Backend WLS or EM application seems to be down

Backend WLS or EM application seems to be down 

  1. Stop OMS

-bash-3.2$ ./stopOMS.sh
Oracle Enterprise Manager Cloud Control 12c Release 2
Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.
Stopping WebTier...
WebTier Successfully Stopped
Stopping Oracle Management Server...
Oracle Management Server Successfully Stopped
AdminServer Successfully Stopped
Oracle Management Server is Down
Oracle Enterprise Manager Cloud Control 12c Release 2
Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.
Stopping agent ..... stopped.

2. Validate all OMS processes are down

-bash-3.2$  ps -ef | grep EMGC_OMS1
orcloud  16481 14974  0 21:05 pts/0    00:00:00 grep EMGC_OMS1
-bash-3.2$ ps -ef | grep oms
orcloud  16496 14974  0 21:06 pts/0    00:00:00 grep oms
-bash-3.2$ ps -ef | grep EMGC_ADMINSERVER
orcloud  16547 14974  0 21:06 pts/0    00:00:00 grep EMGC_ADMINSERVER

3. Delete every lok file

-bash-3.2$ cd gc_inst/user_projects/domains/GCDomain/
-bash-3.2$ find . -name "*.lok"
./config/config.lok
./edit.lok

4. Start OMS

-bash-3.2$ ./startOMS.sh
Oracle Enterprise Manager Cloud Control 12c Release 2
Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.
Starting Oracle Management Server...