Tag: nohup

If you plan on starting your J2EE services manually, and wish to keep them running after you log out, a common method is to use nohup ./command.sh &.

The challenge with the above process, is it will create its own output file nohup.out in the folder that the command was executed in.

Additionally, this nohup.out would be a 2nd I/O operation that would recreate the server.log file for the J2EE service.

To avoid this 2nd I/O operation, review leveraging a redirection of the nohup to /dev/null or determine if this J2EE service can be enabled as a RC/init.d or systemd service.

Example to update the wildfly .profile to allow an “alias” using a bash shell function, to start up the wildfly service; and avoid the creation of the nohup.out file.

echo "Enable alias (or function)  to start and stop wildfly"

#Example of function - Use this to avoid double I/O for nohup process (nohup.out file)
function start_im01 () {
     echo "Starting IM 01 node with nohup process"
     cd /opt/CA/wildfly-idm01/bin/
     pwd
     nohup ./standalone.sh  >/dev/null 2>&1 &
     sleep 1
     /bin/ps -ef | grep wildfly-idm01 | grep -v grep
}
export -f start_im01

function stop_im01 () {
     echo "Stopping IM 01 node"
     echo "This may take 30-120 seconds"
     cd /opt/CA/wildfly-idm01/bin/
     pwd
     ./jboss-cli.sh --connect  --command=":shutdown"
     sleep 5
     /bin/kill -9 `/bin/ps -ef | grep wildfly-idm01 | grep -v grep | awk '{print $2}'` >/dev/null 2>&1
}
export -f stop_im01

You may now start and stop your J2EE Wildfly service with the new “aliases” of start_im01 and stop_im01

You may note that stop_im01 attempts to cleanly stop the Wildfly service via the JBOSS/Wildfly management console port ; and if that fails, we will search and kill the associated java service. If you did “kill” a service, and have startup issues suggest removing the $JBOSS_HOME/standalone/tmp & /data folders before restart.