These troubleshooting topics provide solutions to problems you might encounter in vCenter Server. Guidelines for TroubleshootingTo troubleshoot your implementation of vSphere, identify the symptoms of the problem, determine which of the components are affected, and test possible solutions. Identifying Symptoms Before you attempt to resolve a problem in your implementation, you must identify precisely how it is failing. Defining the Problem SpaceAfter you identify the symptoms of the problem, determine which components in your setup are affected, which components might be causing the problem, and which components are not involved. Testing Possible SolutionsAfter you know the problem's symptoms and which software or hardware components are most likely involved, you can systematically test solutions until you resolve the problem. Troubleshooting with vCenter Server LogsYou can often obtain valuable troubleshooting information by looking at the logs provided by the various services and agents that your implementation is using. vCenter Server Upgrade Fails When Unable to Stop Tomcat ServiceA vCenter Server upgrade can fail when the installer is unable to stop the Tomcat service. Microsoft SQL Database Set to Unsupported Compatibility Mode Causes vCenter Server Installation or Upgrade to FailvCenter Server installation with a Microsoft SQL database fails when the database is set to compatibility mode with an unsupported version. Parent topic: Troubleshooting Overview