GemFire 10.0 Release Notes

This is the first Beta release of GemFire version 10, codenamed “Gideon”.

What’s New in GemFire 10.0

GemFire contains a number of new features and improvements, including:

GemFire also includes functionalities that are implemented as separately-downloadable extensions, including:

Secure Peer-to-Peer Communication

In version 10, all message traffic between GemFire servers uses TCP sockets for better security, performance and maintainability. In earlier versions, the UDP protocol and the JGroups library were used for some communications between cluster members, primarily for membership operations such as join/leave requests and heartbeats. Beginning with version 10, all member-to-member communications use TCP/IP. The JGroups library is distributed with GemFire version 10 to support upgrades from earlier versions.

WAN Delta Replication

In version 10, WAN replication supports sending delta updates between distributed systems to improve the network speed and efficiency.

Improved JSON Support

The JsonDocumentFactory API replaces the JSONFormatter API. The JSONFormatter API has been deprecated in GemFire v10.

The JsonDocumentFactory API allows you to convert a JSON String into a binary form that can be stored in a GemFire region. GemFire accesses each field in the binary form without needing to re-parse JSON or deserialize the binary form. For information about using the JsonDocumentFactory API, see Adding JSON Documents to the GemFire Cache.

GemFire Search

VMware GemFire Search replaces Apache Lucene® in GemFire version 10.

GemFire Search is a search engine that provides indexing and searching capabilities when used with VMware GemFire. GemFire Search is built using the widely-used Java full-text search engine Apache Lucene®. GemFire Search uses the Lucene name in syntax and APIs.

For more information about GemFire Search, see the VMware GemFire Search product documentation.

Classloader Isolation

GemFire deploys JAR files using a classloader isolation model. JAR files are loaded into their own classloaders which are isolated from the rest of the system and from each other. Deployments are able to access classes from other deployed JAR files and from the system, but will look inside their own classloaders first before looking externally.

Classloader isolation is the default setting and is recommended for all new implementations. Chained classloading was the GemFire version 9 default, and is provided in support of legacy applications. Classloader isolation can be disabled using the flag –disable-classloader-isolation=true when starting members through Gfsh using the start command.

JDK Support

GemFire v10 is certified for use with JDK 8, JDK 11 and JDK 17. Starting with version 10.0, JDK 11 is the preferred JDK version. See Java Support for details.

New Environment Variable: GEMFIRE_HOME

In GemFire version 10, the environment variable GEMFIRE_HOME replaces the GEODE_HOME variable. GEODE_HOME has been deprecated.


General support includes security vulnerability resolutions and critical bug fixes in all supported minor versions, while other maintenance is applied only to the latest supported minor release.

Obtaining and Installing Security Updates

New versions of GemFire often include important security fixes, so VMware recommends you keep up to date with the latest releases.

For details about any security fixes in a particular release, see the Notable Vulnerabilities page.

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