I got an error when trying to start Oracle Enterprise Manager Cloud Control 12c. It says AdminServer couldn’t be started:

When I examined the EMGC_ADMINSERVER.out file, I see that “<BEA-141281> <unable to get file lock, will retry …> weblogic.management.ManagementException: Unable to obtain lock” message. As you know, Enterprise Manager Cloud Control uses Weblogic. Weblogic uses “lock” (*.lok) files to prevent a server to run multiple times. I checked if EMGC_ADMINSERVER is running:

and see that it’s not up, so it’s obvious that somehow locks files were not properly cleaned. I shutdown the rest of OMS processes:

then searched for the lock files and removed them

After removing the lock files, I succesfully started OMS including AdminServer.

One Response to “Enterprise Manager 12c: AdminServer Could Not Be Started”

  1. Thank’s very much , very usefull ;-)

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