Question

How can i auto-restart the runnable jar file in Linux.

I am running jar in linux VPS in a separate screen but it stops after some time due to OUTOFMEMORYERROR Java heap space.

Answer 1

Write a simple launcher which will restart the application once it came down. Something like this:

#!/bin/sh

TEMPFILE=`mktemp`
while true ; do
  echo "`date` Starting application" >> $TEMPFILE
  java -XX:OnOutOfMemoryError="kill -9 %p" -jar application.jar
  sleep 5
done

Just to be sure that the VM comes done correcly, you might want to consider the following around your main loop:

try {
    // main loop
    businessLogic();
} catch (OutOfMemoryError E) {
    System.exit(1);
}

Edit: I’ve personally succesfully used the Java Service Wrapper for restarting a now and then failing apache tomcat which suffered from memory leaks after applications have been redeployed too much. You might want to take a look at it, it’s pretty straight forward.