The earlier known issues are grouped as follows.
- The vCenter Upgrade/Migration pre-checks fail with "Unexpected error 87"
The vCenter Server Upgrade/Migration pre-checks fail when the Security Token Service (STS) certificate does not contain a Subject Alternative Name (SAN) field. This situation occurs when you have replaced the vCenter 5.5 Single Sign-On certificate with a custom certificate that has no SAN field, and you attempt to upgrade to vCenter Server 7.0. The upgrade considers the STS certificate invalid and the pre-checks prevent the upgrade process from continuing.
Workaround: Replace the STS certificate with a valid certificate that contains a SAN field then proceed with the vCenter Server 7.0 Upgrade/Migration.
- Problems upgrading to vSphere 7.0 with pre-existing CIM providers
After upgrade, previously installed 32-bit CIM providers stop working because ESXi requires 64-bit CIM providers. Customers may lose management API functions related to CIMPDK, NDDK (native DDK), HEXDK, VAIODK (IO filters), and see errors related to uwglibc dependency.
The syslog reports module missing, "32 bit shared libraries not loaded."
Workaround: There is no workaround. The fix is to download new 64-bit CIM providers from your vendor.
- Installation of 7.0 Update 1 drivers on ESXi 7.0 hosts might fail
You cannot install drivers applicable to ESXi 7.0 Update 1 on hosts that run ESXi 7.0 or 7.0b.
The operation fails with an error, such as:
VMW_bootbank_qedrntv_3.40.4.0-12vmw.701.0.0.xxxxxxx requires vmkapi_2_7_0_0, but the requirement cannot be satisfied within the ImageProfile.
Please refer to the log file for more details.
Workaround: Update the ESXi host to 7.0 Update 1. Retry the driver installation.
- UEFI booting of ESXi hosts might stop with an error during an update to ESXi 7.0 Update 2 from an earlier version of ESXi 7.0
If you attempt to update your environment to 7.0 Update 2 from an earlier version of ESXi 7.0 by using vSphere Lifecycle Manager patch baselines, UEFI booting of ESXi hosts might stop with an error such as:
Loading /boot.cfg
Failed to load crypto64.efi
Fatal error: 15 (Not found)
Workaround: For more information, see VMware knowledge base articles 83063 and 83107 .
- If legacy VIBs are in use on an ESXi host, vSphere Lifecycle Manager cannot extract a desired software specification to seed to a new cluster
With vCenter Server 7.0 Update 2, you can create a new cluster by importing the desired software specification from a single reference host. However, if legacy VIBs are in use on an ESXi host, vSphere Lifecycle Manager cannot extract in the vCenter Server instance where you create the cluster a reference software specification from such a host. In the /var/log/lifecycle.log, you see messages such as:
020-11-11T06:54:03Z lifecycle: 1000082644: HostSeeding:499 ERROR Extract depot failed: Checksum doesn't match. Calculated 5b404e28e83b1387841bb417da93c8c796ef2497c8af0f79583fd54e789d8826, expected: 0947542e30b794c721e21fb595f1851b247711d0619c55489a6a8cae6675e796 2020-11-11T06:54:04Z lifecycle: 1000082644: imagemanagerctl:366 ERROR Extract depot failed. 2020-11-11T06:54:04Z lifecycle: 1000082644: imagemanagerctl:145 ERROR [VibChecksumError]
Workaround: Follow the steps described in VMware knowledge base article 83042.
- You see a short burst of log messages in the syslog.log after every ESXi boot
After updating to ESXi 7.0 Update 2, you might see a short burst of log messages after every ESXi boot.
Such logs do not indicate any issue with ESXi and you can ignore these messages. For example:
2021-01-19T22:44:22Z watchdog-vaai-nasd: '/usr/lib/vmware/nfs/bin/vaai-nasd -f' exited after 0 seconds (quick failure 127) 1
2021-01-19T22:44:22Z watchdog-vaai-nasd: Executing '/usr/lib/vmware/nfs/bin/vaai-nasd -f'
2021-01-19T22:44:22.990Z aainasd[1000051135]: Log for VAAI-NAS Daemon for NFS version=1.0 build=build-00000 option=DEBUG
2021-01-19T22:44:22.990Z vaainasd[1000051135]: DictionaryLoadFile: No entries loaded by dictionary.
2021-01-19T22:44:22.990Z vaainasd[1000051135]: DictionaryLoad: Cannot open file "/usr/lib/vmware/config": No such file or directory.
2021-01-19T22:44:22.990Z vaainasd[1000051135]: DictionaryLoad: Cannot open file "//.vmware/config": No such file or directory.
2021-01-19T22:44:22.990Z vaainasd[1000051135]: DictionaryLoad: Cannot open file "//.vmware/preferences": No such file or directory.
2021-01-19T22:44:22.990Z vaainasd[1000051135]: Switching to VMware syslog extensions
2021-01-19T22:44:22.992Z vaainasd[1000051135]: Loading VAAI-NAS plugin(s).
2021-01-19T22:44:22.992Z vaainasd[1000051135]: DISKLIB-PLUGIN : Not loading plugin /usr/lib/vmware/nas_plugins/lib64: Not a shared library.
Workaround: None
- You see warning messages for missing VIBs in vSphere Quick Boot compatibility check reports
After you upgrade to ESXi 7.0 Update 2, if you check vSphere Quick Boot compatibility of your environment by using the /usr/lib/vmware/loadesx/bin/loadESXCheckCompat.py command, you might see some warning messages for missing VIBs in the shell. For example:
Cannot find VIB(s) ... in the given VIB collection.
Ignoring missing reserved VIB(s) ..., they are removed from reserved VIB IDs.
Such warnings do not indicate a compatibility issue.
Workaround: The missing VIB messages can be safely ignored and do not affect the reporting of vSphere Quick Boot compatibility. The final output line of the loadESXCheckCompat command unambiguously indicates if the host is compatible.
- Auto bootstrapping a cluster that you manage with a vSphere Lifecycle Manager image fails with an error
If you attempt auto bootstrapping a cluster that you manage with a vSphere Lifecycle Manager image to perform a stateful install and overwrite the VMFS partitions, the operation fails with an error. In the support bundle, you see messages such as:
2021-02-11T19:37:43Z Host Profiles[265671 opID=MainThread]: ERROR: EngineModule::ApplyHostConfig. Exception: [Errno 30] Read-only file system
Workaround: Follow vendor guidance to clean the VMFS partition in the target host and retry the operation. Alternatively, use an empty disk. For more information on the disk-partitioning utility on ESXi, see VMware knowledge base article 1036609.
- Upgrades to ESXi 7.x from 6.5.x and 6.7.0 by using ESXCLI might fail due to a space limitation
Upgrades to ESXi 7.x from 6.5.x and 6.7.0 by using the esxcli software profile update or esxcli software profile install ESXCLI commands might fail, because the ESXi bootbank might be less than the size of the image profile. In the ESXi Shell or the PowerCLI shell, you see an error such as:
[InstallationError]
The pending transaction requires 244 MB free space, however the maximum supported size is 239 MB.
Please refer to the log file for more details.
The issue also occurs when you attempt an ESXi host upgrade by using the ESXCLI commands esxcli software vib update or esxcli software vib install.
Workaround: You can perform the upgrade in two steps, by using the esxcli software profile update command to update ESXi hosts to ESXi 6.7 Update 1 or later, and then update to 7.0 Update 1c. Alternatively, you can run an upgrade by using an ISO image and the vSphere Lifecycle Manager.
- You cannot migrate linked clones across vCenter Servers
If you migrate a linked clone across vCenter Servers, operations such as power on and delete might fail for the source virtual machine with an Invalid virtual machine state error.
Workaround: Keep linked clones on the same vCenter Server as the source VM. Alternatively, promote the linked clone to full clone before migration.
- Migration across vCenter Servers of virtual machines with many virtual disks and snapshot levels to a datastore on NVMe over TCP storage might fail
Migration across vCenter Servers of virtual machines with more than 180 virtual disks and 32 snapshot levels to a datastore on NVMe over TCP storage might fail. The ESXi host preemptively fails with an error such as The migration has exceeded the maximum switchover time of 100 second(s).
Workaround: None
- A virtual machine with enabled Virtual Performance Monitoring Counters (VPMC) might fail to migrate between ESXi hosts
If you try to migrate a virtual machine with enabled VPMC by using vSphere vMotion, the operation might fail if the target host is using some of the counters to compute memory or performance statistics. The operation fails with an error such as A performance counter used by the guest is not available on the host CPU.
Workaround: Power off the virtual machine and use cold migration. For more information, see VMware knowledge base article 81191.
- If a live VIB install, upgrade, or remove operation immediately precedes an interactive or scripted upgrade to ESXi 7.0 Update 3 by using the installer ISO, the upgrade fails
When a VIB install, upgrade, or remove operation immediately precedes an interactive or scripted upgrade to ESXi 7.0 Update 3 by using the installer ISO, the ConfigStore might not keep some configurations of the upgrade. As a result, ESXi hosts become inaccessible after the upgrade operation, although the upgrade seems successful. To prevent this issue, the ESXi 7.0 Update 3 installer adds a temporary check to block such scenarios. In the ESXi installer console, you see the following error message: Live VIB installation, upgrade or removal may cause subsequent ESXi upgrade to fail when using the ISO installer.
Workaround: Use an alternative upgrade method to avoid the issue, such as using ESXCLI or the vSphere Lifecycle Manager.
- Smart Card and RSA SecurID authentication might stop working after upgrading to vCenter Server 7.0
If you have configured vCenter Server for either Smart Card or RSA SecurID authentication, see the VMware knowledge base article at https://kb.vmware.com/s/article/78057 before starting the vSphere 7.0 upgrade process. If you do not perform the workaround as described in the KB, you might see the following error messages and Smart Card or RSA SecurID authentication does not work.
"Smart card authentication may stop working. Smart card settings may not be preserved, and smart card authentication may stop working."
or
"RSA SecurID authentication may stop working. RSA SecurID settings may not be preserved, and RSA SecurID authentication may stop working."
Workaround: Before upgrading to vSphere 7.0, see the VMware knowledge base article at https://kb.vmware.com/s/article/78057.
- Upgrading a vCenter Server with an external Platform Services Controller from 6.7u3 to 7.0 fails with VMAFD error
When you upgrade a vCenter Server deployment using an external Platform Services Controller, you converge the Platform Services Controller into a vCenter Server appliance. If the upgrade fails with the error install.vmafd.vmdir_vdcpromo_error_21, the VMAFD firstboot process has failed. The VMAFD firstboot process copies the VMware Directory Service Database (data.mdb) from the source Platform Services Controller and replication partner vCenter Server appliance.
Workaround: Disable TCP Segmentation Offload (TSO) and Generic Segmentation Offload (GSO) on the Ethernet adapter of the source Platform Services Controller or replication partner vCenter Server appliance before upgrading a vCenter Server with an external Platform Services Controller. See Knowledge Base article: https://kb.vmware.com/s/article/74678
- Smart card and RSA SecurID settings may not be preserved during vCenter Server upgrade
Authentication using RSA SecurID will not work after upgrading to vCenter Server 7.0. An error message will alert you to this issue when attempting to login using your RSA SecurID login.
Workaround: Reconfigure the smart card or RSA SecureID.
- Migration of vCenter Server for Windows to vCenter Server appliance 7.0 fails with network error message
Migration of vCenter Server for Windows to vCenter Server appliance 7.0 fails with the error message IP already exists in the network. This prevents the migration process from configuring the network parameters on the new vCenter Server appliance. For more information, examine the log file: /var/log/vmware/upgrade/UpgradeRunner.log
Workaround:
- Verify that all Windows Updates have been completed on the source vCenter Server for Windows instance, or disable automatic Windows Updates until after the migration finishes.
- Retry the migration of vCenter Server for Windows to vCenter Server appliance 7.0.
- When you configure the number of virtual functions for an SR-IOV device by using the max_vfs module parameter, the changes might not take effect
In vSphere 7.0, you can configure the number of virtual functions for an SR-IOV device by using the Virtual Infrastructure Management (VIM) API, for example, through the vSphere Client. The task does not require reboot of the ESXi host. After you use the VIM API configuration, if you try to configure the number of SR-IOV virtual functions by using the max_vfs module parameter, the changes might not take effect because they are overridden by the VIM API configuration.
Workaround: None. To configure the number of virtual functions for an SR-IOV device, use the same method every time. Use the VIM API or use the max_vfs module parameter and reboot the ESXi host.
- Upgraded vCenter Server appliance instance does not retain all the secondary networks (NICs) from the source instance
During a major upgrade, if the source instance of the vCenter Server appliance is configured with multiple secondary networks other than the VCHA NIC, the target vCenter Server instance will not retain secondary networks other than the VCHA NIC. If the source instance is configured with multiple NICs that are part of DVS port groups, the NIC configuration will not be preserved during the upgrade. Configurations for vCenter Server appliance instances that are part of the standard port group will be preserved.
Workaround: None. Manually configure the secondary network in the target vCenter Server appliance instance.
- After upgrading or migrating a vCenter Server with an external Platform Services Controller, users authenticating using Active Directory lose access to the newly upgraded vCenter Server instance
After upgrading or migrating a vCenter Server with an external Platform Services Controller, if the newly upgraded vCenter Server is not joined to an Active Directory domain, users authenticating using Active Directory will lose access to the vCenter Server instance.
Workaround: Verify that the new vCenter Server instance has been joined to an Active Directory domain. See Knowledge Base article: https://kb.vmware.com/s/article/2118543
- Migrating a vCenter Server for Windows with an external Platform Services Controller using an Oracle database fails
If there are non-ASCII strings in the Oracle events and tasks table the migration can fail when exporting events and tasks data. The following error message is provided: UnicodeDecodeError
Workaround: None.
- After an ESXi host upgrade, a Host Profile compliance check shows non-compliant status while host remediation tasks fail
The non-compliant status indicates an inconsistency between the profile and the host.
This inconsistency might occur because ESXi 7.0 does not allow duplicate claim rules, but the profile you use contains duplicate rules. For example, if you attempt to use the Host Profile that you extracted from the host before upgrading ESXi 6.5 or ESXi 6.7 to version 7.0 and the Host Profile contains any duplicate claim rules of system default rules, you might experience the problems.
Workaround:
- Remove any duplicate claim rules of the system default rules from the Host Profile document.
- Check the compliance status.
- Remediate the host.
- If the previous steps do not help, reboot the host.
- Error message displays in the vCenter Server Management Interface
After installing or upgrading to vCenter Server 7.0, when you navigate to the Update panel within the vCenter Server Management Interface, the error message "Check the URL and try again" displays. The error message does not prevent you from using the functions within the Update panel, and you can view, stage, and install any available updates.
Workaround: None.
- VMFS datastores are not mounted automatically after disk hot remove and hot insert on HPE Gen10 servers with SmartPQI controllers
When SATA disks on HPE Gen10 servers with SmartPQI controllers without expanders are hot removed and hot inserted back to a different disk bay of the same machine, or when multiple disks are hot removed and hot inserted back in a different order, sometimes a new local name is assigned to the disk. The VMFS datastore on that disk appears as a snapshot and will not be mounted back automatically because the device name has changed.
Workaround: None. SmartPQI controller does not support unordered hot remove and hot insert operations.
- ESXi might terminate I/O to NVMeOF devices due to errors on all active paths
Occasionally, all active paths to NVMeOF device register I/O errors due to link issues or controller state. If the status of one of the paths changes to Dead, the High Performance Plug-in (HPP) might not select another path if it shows high volume of errors. As a result, the I/O fails.
Workaround: Disable the configuration option /Misc/HppManageDegradedPaths to unblock the I/O.
- VOMA check on NVMe based VMFS datastores fails with error
VOMA check is not supported for NVMe based VMFS datastores and will fail with the error:
ERROR: Failed to reserve device. Function not implemented
Example:
# voma -m vmfs -f check -d /vmfs/devices/disks/: <partition#>
Running VMFS Checker version 2.1 in check mode
Initializing LVM metadata, Basic Checks will be done
Checking for filesystem activity
Performing filesystem liveness check..|Scanning for VMFS-6 host activity (4096 bytes/HB, 1024 HBs).
ERROR: Failed to reserve device. Function not implemented
Aborting VMFS volume check
VOMA failed to check device : General Error
Workaround: None. If you need to analyse VMFS metadata, collect it using the -l option, and pass to VMware customer support. The command for collecting the dump is:
voma -l -f dump -d /vmfs/devices/disks/:<partition#>
- Using the VM reconfigure API to attach an encrypted First Class Disk to an encrypted virtual machine might fail with error
If an FCD and a VM are encrypted with different crypto keys, your attempts to attach the encrypted FCD to the encrypted VM using the VM reconfigure API might fail with the error message:
Cannot decrypt disk because key or password is incorrect.
Workaround: Use the attachDisk API rather than the VM reconfigure API to attach an encrypted FCD to an encrypted VM.
- ESXi host might get in non responding state if a non-head extent of its spanned VMFS datastore enters the Permanent Device Loss (PDL) state
This problem does not occur when a non-head extent of the spanned VMFS datastore fails along with the head extent. In this case, the entire datastore becomes inaccessible and no longer allows I/Os.
In contrast, when only a non-head extent fails, but the head extent remains accessible, the datastore heartbeat appears to be normal. And the I/Os between the host and the datastore continue. However, any I/Os that depend on the failed non-head extent start failing as well. Other I/O transactions might accumulate while waiting for the failing I/Os to resolve, and cause the host to enter the non responding state.
Workaround: Fix the PDL condition of the non-head extent to resolve this issue.
- Virtual NVMe Controller is the default disk controller for Windows 10 guest operating systems
The Virtual NVMe Controller is the default disk controller for the following guest operating systems when using Hardware Version 15 or later:
Windows 10
Windows Server 2016
Windows Server 2019
Some features might not be available when using a Virtual NVMe Controller. For more information, see https://kb.vmware.com/s/article/2147714
Note: Some clients use the previous default of LSI Logic SAS. This includes ESXi host client and PowerCLI.
Workaround: If you need features not available on Virtual NVMe, switch to VMware Paravirtual SCSI (PVSCSI) or LSI Logic SAS. For information on using VMware Paravirtual SCSI (PVSCSI), see https://kb.vmware.com/s/article/1010398
- After an ESXi host upgrade to vSphere 7.0, presence of duplicate core claim rules might cause unexpected behavior
Claim rules determine which multipathing plugin, such as NMP, HPP, and so on, owns paths to a particular storage device. ESXi 7.0 does not support duplicate claim rules. However, the ESXi 7.0 host does not alert you if you add duplicate rules to the existing claim rules inherited through an upgrade from a legacy release. As a result of using duplicate rules, storage devices might be claimed by unintended plugins, which can cause unexpected outcome.
Workaround: Do not use duplicate core claim rules. Before adding a new claim rule, delete any existing matching claim rule.
- A CNS query with the compliance status filter set might take unusually long time to complete
The CNS QueryVolume API enables you to obtain information about the CNS volumes, such as volume health and compliance status. When you check the compliance status of individual volumes, the results are obtained quickly. However, when you invoke the CNS QueryVolume API to check the compliance status of multiple volumes, several tens or hundreds, the query might perform slowly.
Workaround: Avoid using bulk queries. When you need to get compliance status, query one volume at a time or limit the number of volumes in the query API to 20 or fewer. While using the query, avoid running other CNS operations to get the best performance.
- A VMFS datastore backed by an NVMe over Fabrics namespace or device might become permanently inaccessible after recovering from an APD or PDL failure
If a VMFS datastore on an ESXi host is backed by an NVMe over Fabrics namespace or device, in case of an all paths down (APD) or permanent device loss (PDL) failure, the datastore might be inaccessible even after recovery. You cannot access the datastore from either the ESXi host or the vCenter Server system.
Workaround: To recover from this state, perform a rescan on a host or cluster level. For more information, see Perform Storage Rescan.
- Deleted CNS volumes might temporarily appear as existing in the CNS UI
After you delete an FCD disk that backs a CNS volume, the volume might still show up as existing in the CNS UI. However, your attempts to delete the volume fail. You might see an error message similar to the following:
The object or item referred to could not be found.
Workaround: The next full synchronization will resolve the inconsistency and correctly update the CNS UI.
- Attempts to attach multiple CNS volumes to the same pod might occasionally fail with an error
When you attach multiple volumes to the same pod simultaneously, the attach operation might occasionally choose the same controller slot. As a result, only one of the operations succeeds, while other volume mounts fail.
Workaround: After Kubernetes retries the failed operation, the operation succeeds if a controller slot is available on the node VM.
- Under certain circumstances, while a CNS operation fails, the task status appears as successful in the vSphere Client
This might occur when, for example, you use an incompliant storage policy to create a CNS volume. The operation fails, while the vSphere Client shows the task status as successful.
Workaround: The successful task status in the vSphere Client does not guarantee that the CNS operation succeeded. To make sure the operation succeeded, verify its results.
- Unsuccessful delete operation for a CNS persistent volume might leave the volume undeleted on the vSphere datastore
This issue might occur when the CNS Delete API attempts to delete a persistent volume that is still attached to a pod. For example, when you delete the Kubernetes namespace where the pod runs. As a result, the volume gets cleared from CNS and the CNS query operation does not return the volume. However, the volume continues to reside on the datastore and cannot be deleted through the repeated CNS Delete API operations.
Workaround: None.
- Reduced throughput in networking performance on Intel 82599/X540/X550 NICs
The new queue-pair feature added to ixgben driver to improve networking performance on Intel 82599EB/X540/X550 series NICs might reduce throughput under some workloads in vSphere 7.0 as compared to vSphere 6.7.
Workaround: To achieve the same networking performance as vSphere 6.7, you can disable the queue-pair with a module parameter. To disable the queue-pair, run the command:
# esxcli system module parameters set -p "QPair=0,0,0,0..." -m ixgben
After running the command, reboot.
- One or more I/O devices do not generate interrupts when the AMD IOMMU is in use
If the I/O devices on your ESXi host provide more than a total of 512 distinct interrupt sources, some sources are erroneously assigned an interrupt-remapping table entry (IRTE) index in the AMD IOMMU that is greater than the maximum value. Interrupts from such a source are lost, so the corresponding I/O device behaves as if interrupts are disabled.
Workaround: Use the ESXCLI command esxcli system settings kernel set -s iovDisableIR -v true to disable the AMD IOMMU interrupt remapper. Reboot the ESXi host so that the command takes effect.
- When you set auto-negotiation on a network adapter, the device might fail
In some environments, if you set link speed to auto-negotiation for network adapters by using the command esxcli network nic set -a -n vmmicx, the devices might fail and reboot does not recover connectivity. The issue is specific to a combination of some Intel X710/X722 network adapters, a SFP+ module and a physical switch, where auto-negotiate speed/duplex scenario is not supported.
Workaround: Make sure you use an Intel-branded SFP+ module. Alternatively, use a Direct Attach Copper (DAC) cable.
- Solarflare x2542 and x2541 network adapters configured in 1x100G port mode achieve throughput of up to 70Gbps in a vSphere environment
vSphere 7.0 Update 2 supports Solarflare x2542 and x2541 network adapters configured in 1x100G port mode. However, you might see a hardware limitation in the devices that causes the actual throughput to be up to some 70Gbps in a vSphere environment.
Workaround: None
- VLAN traffic might fail after a NIC reset
A NIC with PCI device ID 8086:1537 might stop to send and receive VLAN tagged packets after a reset, for example, with a command vsish -e set /net/pNics/vmnic0/reset 1.
Workaround: Avoid resetting the NIC. If you already face the issue, use the following commands to restore the VLAN capability, for example at vmnic0:
# esxcli network nic software set --tagging=1 -n vmnic0
# esxcli network nic software set --tagging=0 -n vmnic0
- Any change in the NetQueue balancer settings causes NetQueue to be disabled after an ESXi host reboot
Any change in the NetQueue balancer settings by using the command esxcli/localcli network nic queue loadbalancer set -n <nicname> --<lb_setting> causes NetQueue, which is enabled by default, to be disabled after an ESXi host reboot.
Workaround: After a change in the NetQueue balancer settings and host reboot, use the command configstorecli config current get -c esx -g network -k nics to retrieve ConfigStore data to verify whether the /esx/network/nics/net_queue/load_balancer/enable is working as expected.
After you run the command, you see output similar to:
{
"mac": "02:00:0e:6d:14:3e",
"name": "vmnic1",
"net_queue": {
"load_balancer": {
"dynamic_pool": true,
"enable": true
}
},
"virtual_mac": "00:50:56:5a:21:11"
}
If the output is not as expected, for example "load_balancer": "enable": false", run the following command:
esxcli/localcli network nic queue loadbalancer state set -n <nicname> -e true
- Paravirtual RDMA (PVRDMA) network adapters do not support NSX networking policies
If you configure an NSX distributed virtual port for use in PVRDMA traffic, the RDMA protocol traffic over the PVRDMA network adapters does not comply with the NSX network policies.
Workaround: Do not configure NSX distributed virtual ports for use in PVRDMA traffic.
- Rollback from converged vSphere Distributed Switch (VDS) to NSX-T VDS is not supported in vSphere 7.0 Update 3
Rollback from converged VDS that supports both vSphere 7 traffic and NSX-T 3 traffic on the same VDS to one N-VDS for NSX-T traffic is not supported in vSphere 7.0 Update 3.
Workaround: None
- If you do not set the nmlx5 network driver module parameter, network connectivity or ESXi hosts might fail
If you do not set the supported_num_ports module parameter for the nmlx5_core driver on an ESXi host with multiple network adapters of versions Mellanox ConnectX-4, Mellanox ConnectX-5 and Mellanox ConnectX-6, the driver might not allocate sufficient memory for operating all the NIC ports for the host. As a result, you might experience network loss or ESXi host failure with purple diagnostic screen, or both.
Workaround: Set the supported_num_ports module parameter value in the nmlx5_core network driver equal to the total number of Mellanox ConnectX-4, Mellanox ConnectX-5 and Mellanox ConnectX-6 network adapter ports on the ESXi host.
- High throughput virtual machines may experience degradation in network performance when Network I/O Control (NetIOC) is enabled
Virtual machines requiring high network throughput can experience throughput degradation when upgrading from vSphere 6.7 to vSphere 7.0 with NetIOC enabled.
Workaround: Adjust the ethernetx.ctxPerDev setting to enable multiple worlds.
- IPv6 traffic fails to pass through VMkernel ports using IPsec
When you migrate VMkernel ports from one port group to another, IPv6 traffic does not pass through VMkernel ports using IPsec.
Workaround: Remove the IPsec security association (SA) from the affected server, and then reapply the SA. To learn how to set and remove an IPsec SA, see the vSphere Security documentation.
- Higher ESX network performance with a portion of CPU usage increase
ESX network performance may increase with a portion of CPU usage.
Workaround: Remove and add the network interface with only 1 rx dispatch queue. For example:
esxcli network ip interface remove --interface-name=vmk1
esxcli network ip interface add --interface-name=vmk1 --num-rxqueue=1
- VM might lose Ethernet traffic after hot-add, hot-remove or storage vMotion
A VM might stop receiving Ethernet traffic after a hot-add, hot-remove or storage vMotion. This issue affects VMs where the uplink of the VNIC has SR-IOV enabled. PVRDMA virtual NIC exhibits this issue when the uplink of the virtual network is a Mellanox RDMA capable NIC and RDMA namespaces are configured.
Workaround: You can hot-remove and hot-add the affected Ethernet NICs of the VM to restore traffic. On Linux guest operating systems, restarting the network might also resolve the issue. If these workarounds have no effect, you can reboot the VM to restore network connectivity.
- Change of IP address for a VCSA deployed with static IP address requires that you create the DNS records in advance
With the introduction of the DDNS, the DNS record update only works for VCSA deployed with DHCP configured networking. While changing the IP address of the vCenter server via VAMI, the following error is displayed:
The specified IP address does not resolve to the specified hostname.
Workaround: There are two possible workarounds.
- Create an additional DNS entry with the same FQDN and desired IP address. Log in to the VAMI and follow the steps to change the IP address.
- Log in to the VCSA using ssh. Execute the following script:
./opt/vmware/share/vami/vami_config_net
Use option 6 to change the IP adddress of eth0. Once changed, execute the following script:
./opt/likewise/bin/lw-update-dns
Restart all the services on the VCSA to update the IP information on the DNS server.
- It may take several seconds for the NSX Distributed Virtual Port Group (NSX DVPG) to be removed after deleting the corresponding logical switch in NSX Manager.
As the number of logical switches increases, it may take more time for the NSX DVPG in vCenter Server to be removed after deleting the corresponding logical switch in NSX Manager. In an environment with 12000 logical switches, it takes approximately 10 seconds for an NSX DVPG to be deleted from vCenter Server.
Workaround: None.
- Hostd runs out of memory and fails if a large number of NSX Distributed Virtual port groups are created.
In vSphere 7.0, NSX Distributed Virtual port groups consume significantly larger amounts of memory than opaque networks. For this reason, NSX Distributed Virtual port groups can not support the same scale as an opaque network given the same amount of memory.
Workaround:To support the use of NSX Distributed Virtual port groups, increase the amount of memory in your ESXi hosts. If you verify that your system has adequate memory to support your VMs, you can directly increase the memory of hostd using the following command.
localcli --plugin-dir /usr/lib/vmware/esxcli/int/ sched group setmemconfig --group-path host/vim/vmvisor/hostd --units mb --min 2048 --max 2048
Note that this will cause hostd to use memory normally reserved for your environment's VMs. This may have the affect of reducing the number of VMs your ESXi host can support.
- DRS may incorrectly launch vMotion if the network reservation is configured on a VM
If the network reservation is configured on a VM, it is expected that DRS only migrates the VM to a host that meets the specified requirements. In a cluster with NSX transport nodes, if some of the transport nodes join the transport zone by NSX-T Virtual Distributed Switch (N-VDS), and others by vSphere Distributed Switch (VDS) 7.0, DRS may incorrectly launch vMotion. You might encounter this issue when:
- The VM connects to an NSX logical switch configured with a network reservation.
- Some transport nodes join transport zone using N-VDS, and others by VDS 7.0, or, transport nodes join the transport zone through different VDS 7.0 instances.
Workaround: Make all transport nodes join the transport zone by N-VDS or the same VDS 7.0 instance.
- When adding a VMkernel NIC (vmknic) to an NSX portgroup, vCenter Server reports the error "Connecting VMKernel adapter to a NSX Portgroup on a Stateless host is not a supported operation. Please use Distributed Port Group instead."
- For stateless ESXi on Distributed Virtual Switch (DVS), the vmknic on a NSX port group is blocked. You must instead use a Distributed Port Group.
- For stateful ESXi on DVS, vmknic on NSX port group is supported, but vSAN may have an issue if it is using vmknic on a NSX port group.
Workaround: Use a Distributed Port Group on the same DVS.
- Enabling SRIOV from vCenter for QLogic 4x10GE QL41164HFCU CNA might fail
If you navigate to the Edit Settings dialog for physical network adapters and attempt to enable SR-IOV, the operation might fail when using QLogic 4x10GE QL41164HFCU CNA. Attempting to enable SR-IOV might lead to a network outage of the ESXi host.
Workaround: Use the following command on the ESXi host to enable SRIOV:
esxcfg-module
- vCenter Server fails if the hosts in a cluster using Distributed Resource Scheduler (DRS) join NSX-T networking by a different Virtual Distributed Switch (VDS) or combination of NSX-T Virtual Distributed Switch (NVDS) and VDS
In vSphere 7.0, when using NSX-T networking on vSphere VDS with a DRS cluster, if the hosts do not join the NSX transport zone by the same VDS or NVDS, it can cause vCenter Server to fail.
Workaround: Have hosts in a DRS cluster join the NSX transport zone using the same VDS or NVDS.
- You cannot enable NSX-T on a cluster that is already enabled for managing image setup and updates on all hosts collectively
NSX-T is not compatible with the vSphere Lifecycle Manager functionality for image management. When you enable a cluster for image setup and updates on all hosts in the cluster collectively, you cannot enable NSX-T on that cluster. However, you can deploy NSX Edges to this cluster.
Workaround: Move the hosts to a new cluster that you can manage with baselines and enable NSX-T on that new cluster.
- vSphere Lifecycle Manager and vSAN File Services cannot be simultaneously enabled on a vSAN cluster in vSphere 7.0 release
If vSphere Lifecycle Manager is enabled on a cluster, vSAN File Services cannot be enabled on the same cluster and vice versa. In order to enable vSphere Lifecycle Manager on a cluster, which has VSAN File Services enabled already, first disable vSAN File Services and retry the operation. Please note that if you transition to a cluster that is managed by a single image, vSphere Lifecycle Manager cannot be disabled on that cluster.
Workaround: None.
- When a hardware support manager is unavailable, vSphere High Availability (HA) functionality is impacted
If hardware support manager is unavailable for a cluster that you manage with a single image, where a firmware and drivers addon is selected and vSphere HA is enabled, the vSphere HA functionality is impacted. You may experience the following errors.
- Configuring vSphere HA on a cluster fails.
- Cannot complete the configuration of the vSphere HA agent on a host:
Applying HA VIBs on the cluster encountered a failure.
- Remediating vSphere HA fails:
A general system error occurred: Failed to get Effective Component map.
- Disabling vSphere HA fails: Delete Solution task failed.
A general system error occurred: Cannot find hardware support package from depot or hardware support manager.
Workaround:
- If the hardware support manager is temporarily unavailable, perform the following steps.
- Reconnect the hardware support manager to vCenter Server.
- Select a cluster from the Hosts and Cluster menu.
- Select the Configure tab.
- Under Services, click vSphere Availability.
- Re-enable vSphere HA.
- If the hardware support manager is permanently unavailable, perform the following steps.
- Remove the hardware support manager and the hardware support package from the image specification
- Re-enable vSphere HA.
- Select a cluster from the Hosts and Cluster menu.
- Select the Updates tab.
- Click Edit .
- Remove the firmware and drivers addon and click Save.
- Select the Configure tab.
- Under Services, click vSphere Availability.
- Re-enable vSphere HA.
- I/OFilter is not removed from a cluster after a remediation process in vSphere Lifecycle Manager
Removing I/OFilter from a cluster by remediating the cluster in vSphere Lifecycle Manager, fails with the following error message: iofilter XXX already exists. Тhe iofilter remains listed as installed.
Workaround:
- Call IOFilter API
UninstallIoFilter_Task from the vCenter Server managed object (IoFilterManager).
- Remediate the cluster in vSphere Lifecycle Manager.
- Call IOFilter API
ResolveInstallationErrorsOnCluster_Task from the vCenter Server managed object (IoFilterManager) to update the database.
- While remediating a vSphere HA enabled cluster in vSphere Lifecycle Manager, adding hosts causes a vSphere HA error state
Adding one or multiple ESXi hosts during a remediation process of a vSphere HA enabled cluster, results in the following error message: Applying HA VIBs on the cluster encountered a failure.
Workaround: Аfter the cluster remediation operation has finished, perform one of the following tasks.
- Right-click the failed ESXi host and select Reconfigure for vSphere HA.
- Disable and re-enable vSphere HA for the cluster.
- While remediating a vSphere HA enabled cluster in vSphere Lifecycle Manager, disabling and re-enabling vSphere HA causes a vSphere HA error state
Disabling and re-enabling vSphere HA during remediation process of a cluster, may fail the remediation process due to vSphere HA health checks reporting that hosts don't have vSphere HA VIBs installed. You may see the following error message: Setting desired image spec for cluster failed.
Workaround: Аfter the cluster remediation operation has finished, disable and re-enable vSphere HA for the cluster.
- Checking for recommended images in vSphere Lifecycle Manager has slow performance in large clusters
In large clusters with more than 16 hosts, the recommendation generation task could take more than an hour to finish or may appear to hang. The completion time for the recommendation task depends on the number of devices configured on each host and the number of image candidates from the depot that vSphere Lifecycle Manager needs to process before obtaining a valid image to recommend.
Workaround: None.
- Checking for hardware compatibility in vSphere Lifecycle Manager has slow performance in large clusters
In large clusters with more than 16 hosts, the validation report generation task could take up to 30 minutes to finish or may appear to hang. The completion time depends on the number of devices configured on each host and the number of hosts configured in the cluster.
Workaround: None
- Incomplete error messages in non-English languages are displayed, when remediating a cluster in vSphere Lifecycle Manager
You can encounter incomplete error messages for localized languages in the vCenter Server user interface. The messages are displayed, after a cluster remediation process in vSphere Lifecycle Manager fails. For example, your can observe the following error message.
The error message in English language: Virtual machine 'VMC on DELL EMC -FileServer' that runs on cluster 'Cluster-1' reported an issue which prevents entering maintenance mode: Unable to access the virtual machine configuration: Unable to access file[local-0] VMC on Dell EMC - FileServer/VMC on Dell EMC - FileServer.vmx
The error message in French language: La VM « VMC on DELL EMC -FileServer », située sur le cluster « {Cluster-1} », a signalé un problème empêchant le passage en mode de maintenance : Unable to access the virtual machine configuration: Unable to access file[local-0] VMC on Dell EMC - FileServer/VMC on Dell EMC - FileServer.vmx
Workaround: None.
- Importing an image with no vendor addon, components, or firmware and drivers addon to a cluster which image contains such elements, does not remove the image elements of the existing image
Only the ESXi base image is replaced with the one from the imported image.
Workaround: After the import process finishes, edit the image, and if needed, remove the vendor addon, components, and firmware and drivers addon.
- When you convert a cluster that uses baselines to a cluster that uses a single image, a warning is displayed that vSphere HA VIBs will be removed
Converting a vSphere HA enabled cluster that uses baselines to a cluster that uses a single image, may result a warning message displaying that vmware-fdm component will be removed.
Workaround: This message can be ignored. The conversion process installs the vmware-fdm component.
- If vSphere Update Manager is configured to download patch updates from the Internet through a proxy server, after upgrade to vSphere 7.0 that converts Update Manager to vSphere Lifecycle Manager, downloading patches from VMware patch repository might fail
In earlier releases of vCenter Server you could configure independent proxy settings for vCenter Server and vSphere Update Manager. After an upgrade to vSphere 7.0, vSphere Update Manager service becomes part of the vSphere Lifecycle Manager service. For the vSphere Lifecycle Manager service, the proxy settings are configured from the vCenter Server appliance settings. If you had configured Update Manager to download patch updates from the Internet through a proxy server but the vCenter Server appliance had no proxy setting configuration, after a vCenter Server upgrade to version 7.0, the vSphere Lifecycle Manager fails to connect to the VMware depot and is unable to download patches or updates.
Workaround: Log in to the vCenter Server Appliance Management Interface, https://vcenter-server-appliance-FQDN-or-IP-address:5480, to configure proxy settings for the vCenter Server appliance and enable vSphere Lifecycle Manager to use proxy.
- The VMkernel might shut down virtual machines due to a vCPU timer issue
In rare occasions, the VMkernel might consider a virtual machine unresponsive, because it fails to send properly PCPU heartbeat, and shut the VM down. In the vmkernel.log file, you see messages such as:
2021-05-28T21:39:59.895Z cpu68:1001449770)ALERT: Heartbeat: HandleLockup:827: PCPU 8 didn't have a heartbeat for 5 seconds, timeout is 14, 1 IPIs sent; *may* be locked up.
2021-05-28T21:39:59.895Z cpu8:1001449713)WARNING: World: vm 1001449713: PanicWork:8430: vmm3:VM_NAME:vcpu-3:Received VMkernel NMI IPI, possible CPU lockup while executing HV VT VM
The issue is due to a rare race condition in vCPU timers. Because the race is per-vCPU, larger VMs are more exposed to the issue.
Workaround: Disable PCPU heartbeat by using the command vsish -e set /reliability/heartbeat/status 0.
- When applying a host profile with version 6.5 to a ESXi host with version 7.0, the compliance check fails
Applying a host profile with version 6.5 to a ESXi host with version 7.0, results in Coredump file profile reported as not compliant with the host.
Workaround: There are two possible workarounds.
- When you create a host profile with version 6.5, set an advanced configuration option VMkernel.Boot.autoCreateDumpFile to false on the ESXi host.
- When you apply an existing host profile with version 6.5, add an advanced configuration option VMkernel.Boot.autoCreateDumpFile in the host profile, configure the option to a fixed policy, and set value to false.
- Mellanox ConnectX-4 or ConnectX-5 native ESXi drivers might exhibit minor throughput degradation when Dynamic Receive Side Scaling (DYN_RSS) or Generic RSS (GEN_RSS) feature is turned on
Mellanox ConnectX-4 or ConnectX-5 native ESXi drivers might exhibit less than 5 percent throughput degradation when DYN_RSS and GEN_RSS feature is turned on, which is unlikely to impact normal workloads.
Workaround: You can disable DYN_RSS and GEN_RSS feature with the following commands:
# esxcli system module parameters set -m nmlx5_core -p "DYN_RSS=0 GEN_RSS=0"
# reboot
- RDMA traffic between two VMs on the same host might fail in PVRDMA environment
In a vSphere 7.0 implementation of a PVRDMA environment, VMs pass traffic through the HCA for local communication if an HCA is present. However, loopback of RDMA traffic does not work on qedrntv driver. For instance, RDMA Queue Pairs running on VMs that are configured under same uplink port cannot communicate with each other.
In vSphere 6.7 and earlier, HCA was used for local RDMA traffic if SRQ was enabled. vSphere 7.0 uses HCA loopback with VMs using versions of PVRDMA that have SRQ enabled with a minimum of HW v14 using RoCE v2.
The current version of Marvell FastLinQ adapter firmware does not support loopback traffic between QPs of the same PF or port.
Workaround: Required support is being added in the out-of-box driver certified for vSphere 7.0. If you are using the inbox qedrntv driver, you must use a 3-host configuration and migrate VMs to the third host.
- Unreliable Datagram traffic QP limitations in qedrntv driver
There are limitations with the Marvell FastLinQ qedrntv RoCE driver and Unreliable Datagram (UD) traffic. UD applications involving bulk traffic might fail with qedrntv driver. Additionally, UD QPs can only work with DMA Memory Regions (MR). Physical MRs or FRMR are not supported. Applications attempting to use physical MR or FRMR along with UD QP fail to pass traffic when used with qedrntv driver. Known examples of such test applications are ibv_ud_pingpong and ib_send_bw.
Standard RoCE and RoCEv2 use cases in a VMware ESXi environment such as iSER, NVMe-oF (RoCE) and PVRDMA are not impacted by this issue. Use cases for UD traffic are limited and this issue impacts a small set of applications requiring bulk UD traffic.
Marvell FastLinQ hardware does not support RDMA UD traffic offload. In order to meet the VMware PVRDMA requirement to support GSI QP, a restricted software only implementation of UD QP support was added to the qedrntv driver. The goal of the implementation is to provide support for control path GSI communication and is not a complete implementation of UD QP supporting bulk traffic and advanced features.
Since UD support is implemented in software, the implementation might not keep up with heavy traffic and packets might be dropped. This can result in failures with bulk UD traffic.
Workaround: Bulk UD QP traffic is not supported with qedrntv driver and there is no workaround at this time. VMware ESXi RDMA (RoCE) use cases like iSER, NVMe, RDMA and PVRDMA are unaffected by this issue.
- Servers equipped with QLogic 578xx NIC might fail when frequently connecting or disconnecting iSCSI LUNs
If you trigger QLogic 578xx NIC iSCSI connection or disconnection frequently in a short time, the server might fail due to an issue with the qfle3 driver. This is caused by a known defect in the device's firmware.
Workaround: None.
- ESXi might fail during driver unload or controller disconnect operation in Broadcom NVMe over FC environment
In Broadcom NVMe over FC environment, ESXi might fail during driver unload or controller disconnect operation and display an error message such as: @BlueScreen: #PF Exception 14 in world 2098707:vmknvmeGener IP 0x4200225021cc addr 0x19
Workaround: None.
- ESXi does not display OEM firmware version number of i350/X550 NICs on some Dell servers
The inbox ixgben driver only recognizes firmware data version or signature for i350/X550 NICs. On some Dell servers the OEM firmware version number is programmed into the OEM package version region, and the inbox ixgben driver does not read this information. Only the 8-digit firmware signature is displayed.
Workaround: To display the OEM firmware version number, install async ixgben driver version 1.7.15 or later.
- X710 or XL710 NICs might fail in ESXi
When you initiate certain destructive operations to X710 or XL710 NICs, such as resetting the NIC or manipulating VMKernel's internal device tree, the NIC hardware might read data from non-packet memory.
Workaround: Do not reset the NIC or manipulate vmkernel internal device state.
- NVMe-oF does not guarantee persistent VMHBA name after system reboot
NVMe-oF is a new feature in vSphere 7.0. If your server has a USB storage installation that uses vmhba30+ and also has NVMe over RDMA configuration, the VMHBA name might change after a system reboot. This is because the VMHBA name assignment for NVMe over RDMA is different from PCIe devices. ESXi does not guarantee persistence.
Workaround: None.
- Backup fails for vCenter database size of 300 GB or greater
If the vCenter database size is 300 GB or greater, the file-based backup will fail with a timeout. The following error message is displayed: Timeout! Failed to complete in 72000 seconds
Workaround: None.
- A restore of vCenter Server 7.0 which is upgraded from vCenter Server 6.x with External Platform Services Controller to vCenter Server 7.0 might fail
When you restore a vCenter Server 7.0 which is upgraded from 6.x with External Platform Services Controller to vCenter Server 7.0, the restore might fail and display the following error: Failed to retrieve appliance storage list
Workaround: During the first stage of the restore process, increase the storage level of the vCenter Server 7.0. For example if the vCenter Server 6.7 External Platform Services Controller setup storage type is small, select storage type large for the restore process.
- Enabled SSL protocols configuration parameter is not configured during a host profile remediation process
Enabled SSL protocols configuration parameter is not configured during a host profile remediation and only the system default protocol tlsv1.2 is enabled. This behavior is observed for a host profile with version 7.0 and earlier in a vCenter Server 7.0 environment.
Workaround: To enable TLSV 1.0 or TLSV 1.1 SSL protocols for SFCB, log in to an ESXi host by using SSH, and run the following ESXCLI command: esxcli system wbem -P <protocol_name>
- Unable to configure Lockdown Mode settings by using Host Profiles
Lockdown Мode cannot be configured by using a security host profile and cannot be applied to multiple ESXi hosts at once. You must manually configure each host.
Workaround: In vCenter Server 7.0, you can configure Lockdown Mode and manage Lockdown Mode exception user list by using a security host profile.
- When a host profile is applied to a cluster, Enhanced vMotion Compatibility (EVC) settings are missing from the ESXi hosts
Some settings in the VMware config file /etc/vmware/config are not managed by Host Profiles and are blocked, when the config file is modified. As a result, when the host profile is applied to a cluster, the EVC settings are lost, which causes loss of EVC functionalities. For example, unmasked CPUs can be exposed to workloads.
Workaround: Reconfigure the relevant EVC baseline on cluster to recover the EVC settings.
- Using a host profile that defines a core dump partition in vCenter Server 7.0 results in an error
In vCenter Server 7.0, configuring and managing a core dump partition in a host profile is not available. Attempting to apply a host profile that defines a core dump partition, results in the following error: No valid coredump partition found.
Workaround: None. In vCenter Server 7.0., Host Profiles supports only file-based core dumps.
- If you run the ESXCLI command to unload the firewall module, the hostd service fails and ESXi hosts lose connectivity
If you automate the firewall configuration in an environment that includes multiple ESXi hosts, and run the ESXCLI command esxcli network firewall unload that destroys filters and unloads the firewall module, the hostd service fails and ESXi hosts lose connectivity.
Workaround: Unloading the firewall module is not recommended at any time. If you must unload the firewall module, use the following steps:
- Stop the hostd service by using the command:
/etc/init.d/hostd stop.
- Unload the firewall module by using the command:
esxcli network firewall unload.
- Perform the required operations.
- Load the firewall module by using the command:
esxcli network firewall load.
- Start the hostd service by using the command:
/etc/init.d/hostd start.
- vSphere Storage vMotion operations might fail in a vSAN environment due to an unauthenticated session of the Network File Copy (NFC) manager
Migrations to a vSAN datastore by using vSphere Storage vMotion of virtual machines that have at least one snapshot and more than one virtual disk with different storage policy might fail. The issue occurs due to an unauthenticated session of the NFC manager because the Simple Object Access Protocol (SOAP) body exceeds the allowed size.
Workaround: First migrate the VM home namespace and just one of the virtual disks. After the operation completes, perform a disk only migration of the remaining 2 disks.
- Changes in the properties and attributes of the devices and storage on an ESXi host might not persist after a reboot
If the device discovery routine during a reboot of an ESXi host times out, the jumpstart plug-in might not receive all configuration changes of the devices and storage from all the registered devices on the host. As a result, the process might restore the properties of some devices or storage to the default values after the reboot.
Workaround: Manually restore the changes in the properties of the affected device or storage.
- If you use a beta build of ESXi 7.0, ESXi hosts might fail with a purple diagnostic screen during some lifecycle operations
If you use a beta build of ESXi 7.0, ESXi hosts might fail with a purple diagnostic screen during some lifecycle operations such as unloading a driver or switching between ENS mode and native driver mode. For example, if you try to change the ENS mode, in the backtrace you see an error message similar to: case ENS::INTERRUPT::NoVM_DeviceStateWithGracefulRemove hit BlueScreen: ASSERT bora/vmkernel/main/dlmalloc.c:2733 This issue is specific for beta builds and does not affect release builds such as ESXi 7.0.
Workaround: Update to ESXi 7.0 GA.
- You cannot create snapshots of virtual machines due to an error that a digest operation has failed
A rare race condition when an All-Paths-Down (APD) state occurs during the update of the Content Based Read Cache (CBRC) digest file might cause inconsistencies in the digest file. As a result, you cannot create virtual machine snapshots. You see an error such as An error occurred while saving the snapshot: A digest operation has failed in the backtrace.
Workaround: Power cycle the virtual machines to trigger a recompute of the CBRC hashes and clear the inconsistencies in the digest file.
- If you upgrade your ESXi hosts to version 7.0 Update 3, but your vCenter Server is of an earlier version, Trusted Platform Module (TPM) attestation of the ESXi hosts fails
If you upgrade your ESXi hosts to version 7.0 Update 3, but your vCenter Server is of an earlier version, and you enable TPM, ESXi hosts fail to pass attestation. In the vSphere Client, you see the warning Host TPM attestation alarm. The Elliptic Curve Digital Signature Algorithm (ECDSA) introduced with ESXi 7.0 Update 3 causes the issue when vCenter Server is not of version 7.0 Update 3.
Workaround: Upgrade your vCenter Server to 7.0 Update 3 or acknowledge the alarm.
- You see warnings in the boot loader screen about TPM asset tags
If a TPM-enabled ESXi host has no asset tag set on, you might see idle warning messages in the boot loader screen such as:
Failed to determine TPM asset tag size: Buffer too small
Failed to measure asset tag into TPM: Buffer too small
Workaround: Ignore the warnings or set an asset tag by using the command $ esxcli hardware tpm tag set -d
- The sensord daemon fails to report ESXi host hardware status
A logic error in the IPMI SDR validation might cause sensord to fail to identify a source for power supply information. As a result, when you run the command vsish -e get /power/hostStats, you might not see any output.
Workaround: None
- If an ESXi host fails with a purple diagnostic screen, the netdump service might stop working
In rare cases, if an ESXi host fails with a purple diagnostic screen, the netdump service might fail with an error such as NetDump FAILED: Couldn't attach to dump server at IP x.x.x.x.
Workaround: Configure the VMkernel core dump to use local storage.
- You see frequent VMware Fault Domain Manager (FDM) core dumps on multiple ESXi hosts
In some environments, the number of datastores might exceed the FDM file descriptor limit. As a result, you see frequent core dumps on multiple ESXi hosts indicating FDM failure.
Workaround: Increase the FDM file descriptor limit to 2048. You can use the setting das.config.fdm.maxFds from the vSphere HA advanced options in the vSphere Client. For more information, see Set Advanced Options.
- Virtual machines on a vSAN cluster with enabled NSX-T and a converged vSphere Distributed Switch (CVDS) in a VLAN transport zone cannot power on after a power off
If a secondary site is 95% disk full and VMs are powered off before simulating a secondary site failure, during recovery some of the virtual machines fail to power on. As a result, virtual machines become unresponsive. The issue occurs regardless if site recovery includes adding disks or ESXi hosts or CPU capacity.
Workaround: Select the virtual machines that do not power on and change the network to VM Network from Edit Settings on the VM context menu.
- If you modify the netq_rss_ens parameter of the nmlx5_core driver, ESXi hosts might fail with a purple diagnostic screen
If you try to enable the netq_rss_ens parameter when you configure an enhanced data path on the nmlx5_core driver, ESXi hosts might fail with a purple diagnostic screen. The netq_rss_ens parameter, which enables NetQ RSS, is disabled by default with a value of 0.
Workaround: Keep the default value for the netq_rss_ens module parameter in the nmlx5_core driver.
- Upgrade to ESXi 7.0 Update 3 might fail due to changed name of the inbox i40enu network driver
Starting with vSphere 7.0 Update 3, the inbox i40enu network driver for ESXi changes name back to i40en. The i40en driver was renamed to i40enu in vSphere 7.0 Update 2, but the name change impacted some upgrade paths. For example, rollup upgrade of ESXi hosts that you manage with baselines and baseline groups from 7.0 Update 2 or 7.0 Update 2a to 7.0 Update 3 fails. In most cases, the i40enu driver upgrades to ESXi 7.0 Update 3 without any additional steps. However, if the driver upgrade fails, you cannot update ESXi hosts that you manage with baselines and baseline groups. You also cannot use host seeding or a vSphere Lifecycle Manager single image to manage the ESXi hosts. If you have already made changes related to the i40enu driver and devices in your system, before upgrading to ESXi 7.0 Update 3, you must uninstall the i40enu VIB or Component on ESXi, or first upgrade ESXi to ESXi 7.0 Update 2c.
Workaround: For more information, see VMware knowledge base article 85982.
- The Windows guest OS of a virtual machine configured with a virtual NVDIMM of size less than 16MB might fail while initializing a new disk
If you configure a Windows virtual machine with a NVDIMM of size less than 16MB, when you try to initialize a new disk, you might see either the guest OS failing with a blue diagnostic screen or an error message in a pop-up window in the Disk Management screen. The blue diagnostic screen issue occurs in Windows 10, Windows Server 2022, and Windows 11 v21H2 guest operating systems.
Workaround: Increase the size of the virtual NVDIMM to 16MB or larger.
- If you use a vSphere Distributed Switch (VDS) of version earlier than 6.6 and change the LAG hash algorithm, ESXi hosts might fail with a purple diagnostic screen
If you use a VDS of version earlier than 6.6 on a vSphere 7.0 Update 1 or later system, and you change the LAG hash algorithm, for example from L3 to L2 hashes, ESXi hosts might fail with a purple diagnostic screen.
Workaround: Upgrade VDS to version 6.6 or later.
- HTTP requests from certain libraries to vSphere might be rejected
The HTTP reverse proxy in vSphere 7.0 enforces stricter standard compliance than in previous releases. This might expose pre-existing problems in some third-party libraries used by applications for SOAP calls to vSphere.
If you develop vSphere applications that use such libraries or include applications that rely on such libraries in your vSphere stack, you might experience connection issues when these libraries send HTTP requests to VMOMI. For example, HTTP requests issued from vijava libraries can take the following form:
POST /sdk HTTP/1.1
SOAPAction
Content-Type: text/xml; charset=utf-8
User-Agent: Java/1.8.0_221
The syntax in this example violates an HTTP protocol header field requirement that mandates a colon after SOAPAction. Hence, the request is rejected in flight.
Workaround: Developers leveraging noncompliant libraries in their applications can consider using a library that follows HTTP standards instead. For example, developers who use the vijava library can consider using the latest version of the yavijava library instead.
- You might see a dump file when using Broadcom driver lsi_msgpt3, lsi_msgpt35 and lsi_mr3
When using the lsi_msgpt3, lsi_msgpt35 and lsi_mr3 controllers, there is a potential risk to see dump file lsuv2-lsi-drivers-plugin-util-zdump. There is an issue when exiting the storelib used in this plugin utility. There is no impact on ESXi operations, you can ignore the dump file.
Workaround: You can safely ignore this message. You can remove the lsuv2-lsi-drivers-plugin with the following command:
esxcli software vib remove -n lsuv2-lsiv2-drivers-plugin
- You might see reboot is not required after configuring SR-IOV of a PCI device in vCenter, but device configurations made by third party extensions might be lost and require reboot to be re-applied.
In ESXi 7.0, SR-IOV configuration is applied without a reboot and the device driver is reloaded. ESXi hosts might have third party extensions perform device configurations that need to run after the device driver is loaded during boot. A reboot is required for those third party extensions to re-apply the device configuration.
Workaround: You must reboot after configuring SR-IOV to apply third party device configurations.
