BEA-000362 due to "Unable to obtain lock" on AdminServer lock file

Problem:

When starting up the Oracle WebLogic 11g AdminServer, you may get the following error:

<Dec 3, 2010 8:57:32 AM EST> <Critical> <WebLogicServer> <BEA-000362> <Server failed. Reason:

There are 1 nested errors:

weblogic.management.ManagementException: Unable to obtain lock on /u01/app/oracle/middleware/user_projects/domains/soa_domain/servers/AdminServer/tmp/AdminServer.lok. Server may already be running
        at weblogic.management.internal.ServerLocks.getServerLock(ServerLocks.java:159)
        at weblogic.management.internal.ServerLocks.getServerLock(ServerLocks.java:58)
        at weblogic.management.internal.DomainDirectoryService.start(DomainDirectoryService.java:74)
        at weblogic.t3.srvr.ServerServicesManager.startService(ServerServicesManager.java:461)
        at weblogic.t3.srvr.ServerServicesManager.startInStandbyState(ServerServicesManager.java:166)
        at weblogic.t3.srvr.T3Srvr.initializeStandby(T3Srvr.java:802)
        at weblogic.t3.srvr.T3Srvr.startup(T3Srvr.java:489)
        at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:446)
        at weblogic.Server.main(Server.java:67)

>
<Dec 3, 2010 8:57:32 AM EST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to FAILED>
<Dec 3, 2010 8:57:32 AM EST> <Error> <WebLogicServer> <BEA-000383> <A critical service failed. The server will shut itself down>
<Dec 3, 2010 8:57:32 AM EST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to FORCE_SHUTTING_DOWN>

Solution:

1. Shutdown the AdminServer gracefully as follows:

export MW_HOME=/u01/app/oracle/middleware

export DOMAIN_HOME=$MW_HOME/user_projects/domains/soa_domain

$DOMAIN_HOME/bin/stopWebLogic.sh

2. Remove the lock file:

rm /u01/app/oracle/middleware/user_projects/domains/soa_domain/servers/AdminServer/tmp/AdminServer.lok

3. Restart the AdminServer as follows, and you should be okay:

export MW_HOME=/u01/app/oracle/middlware

export DOMAIN_HOME=$MW_HOME/user_projects/domains/soa_domain

cd $DOMAIN_HOME/bin

nohup $DOMAIN_HOME/bin/startWebLogic.sh &

Applicable Versions:

• Oracle WebLogic 11g (11.1.1.x)