Unable to start Admin server in apps R12.2

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There could be several reasons for not starting the admin server. Here I will explain some simple sanity check if the admin server is not starting.

Verify If any admin server process running/not. If anyting is running kill it and start the admin server

Before restarting the Admin Server, it’s important to ensure no existing process is running that might be causing a conflict. You can check this by running the following command:

ps -ef |grep -i adminserver

If you find an active Admin Server process, kill it and then attempt to start the Admin Server again.

Verify the adminserver log file

cd $EBS_DOMAIN_HOME/servers/AdminServer/log/adminserver.log
cd $EBS_DOMAIN_HOME/servers/AdminServer/log/adminserver.out

Verify if any recent changes in config.xml file 

cd $EBS_DOMAIN_HOME/config/config.xml


Recently below is a sample error encountered in my environment.


Log file Error :

weblogic.store.PersistentStoreFatalException: [Store:280105]The persistent file store "WLS_DIAGNOSTICS" cannot open file WLS_DIAGNOSTICS000000.DAT.

Solution:

Force shutdown and try to start

Go to DOMAIN_HOME/servers/<SERVERNAME>/data/ldap/ldapfiles and remove the EmbeddedLDAP.lok lock file

Delete the *.dat file under DOMAIN_HOME/servers/<SERVERNAME>/data /store/default and DOMAIN_HOME/servers/<SERVERNAME>/data /store/diagnostics/

Remove the contents under DOMAIN_HOME/servers/<SERVERNAME>/ tmp and DOMAIN_HOME/servers/<SERVERNAME>/ cache

Now start the server

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