ADMS0005E: The system is unable to generate synchronization request: javax.management.JMRuntimeException: ADMN0022E: Access is denied for the getRepositoryEpoch operation on ConfigRepository MBean because of insufficient or empty credentials.

If you get this error then synchronisation issue is there.Please check node is in sync in WAS console.
The server will not come up if node is not synch .Check for error messages like
Caused by: com.ibm.ejs.EJSException: Could not register with Location Service Daemon, which could only reside in the NodeAgent in SysOut logs.

Restart nodeagent to solve the issue .
The JVM will not come up if nodeagent has issue in registering with local service deamon.