Common problems with Tomcat
From Oxxus Wiki
Two of the common problems with Tomcat are "service unavailable" and "out of memory error". An explanation and quick solution for either is offered below.
Should you experience any other issues with Tomcat, submit a ticket to our support team, to help you resolve it.
Log onto your VPS and restart Tomcat.
OutOfMemoryError
Fix application, inspect logs, increase heap size.
