Restart tomcat automatically when it gets outofmemory error

Question

How can I configure Tomcat to automatically restart when get an out of memory [OOME] error.

As i think

-XX:OnOutOfMemoryError="/yourscripts/tomcat-restart"

But not sure here "yourscripts" stand for what directory?

Answer 1

The value you provide to -XX:OnOutOfMemoryError must be the fully qualified path to an executable (can be executable script). That script must return basically immediately so that the jvm can continue and shutdown. So it needs to attempt to stop and start tomcat in the background. This may result in effectively 2 scripts:

Script 1:

#!/bin/bash
script2.sh &

Script 2:

# stop tomcat
# make sure it is dead (kill "zombie" process if necessary)
# start tomcat

The -XX:OnOutOfMemoryError shoudl point to script 1.