Managed node fails to synchronize (27 of 285 technotes for 2015)

Access is denied for the getRepositoryEpoch operation on ConfigRepository MBean because of insufficient or empty credentials.

In Administrative console:

1. SSL certificate and key management -> Key set groups ->Select Key set group name -> uncheck the box for “Automatically generate keys”
   
   Clear the Automatically generate keys option.
   
2. From the Key set groups -> check key set Group name and hit Generated Keys tab.
   
3. Click OK and Save to save the changes to the master configuration.
   
4. Stop the dmgr
   
5. On dmgr side delete the contents under wstemp, temp and config/temp folder from <profile_root>
   
6. Start the dmgr
   
7. Stop the Node/Server using stopNode/stopServer commands from the <profile_root>/bin of AppServer
   
8. Manually synchronize the node by running syncNode.sh from <profile_root>/bin, since security is enabled then please run following command
   
   syncNode.sh <DMgr_hostName> <SOAP_PORT_of_DMGR> -username <username> -password <password>
   
9. Start the node and server.
   
10. Logon to Dmgr Administrative console and check the Node/Server availability.

Reference: http://www-01.ibm.com/support/docview.wss?uid=swg21405907