Oc4j:Oacore Process Does Not Start or WARNING: ApplicationLogManager is not installed, may result in loader leaks

Oc4j:Oacore Process Does Not Start (or)

WARNING: ApplicationLogManager is not installed, may result in loader leaks.Djava.util.logging.manager=oracle.classloader.util.ApplicationLogManager

Solution:

Turned out to be .lock files under $INST_TOP/ora/10.1.3/j2ee/oacore/persistence/oacore_default_group_1.

Once removed the .lock file the services started.

Check for and remove the lock files from the following directories.

$INST_TOP/ora/10.1.3/j2ee/oacore/persistence
$INST_TOP/ora/10.1.3/j2ee/oafm/persistence
$INST_TOP/ora/10.1.3/j2ee/forms/persistence

Restart services.
cd $ADMIN_SCRIPTS_HOME
./adstrtall.sh apps/apps_pw or ./adoacorectl.sh

or

Start one by one.