solr stops running periodically

[athir nuaimi]

We have 4 machines running solr. On one of the machines, every 2-3 days solr stops running. By that I mean that the java/tomcat process just disappears. If I look at the catalina logs, I see normal log entries and then nothing. There is no shutdown messages like you would normally see if you sent a SIGTERM to the process.

Obviously this is a problem. I''m new to solr/java so if there are more diagnostic things I can do I'd appreciate any tips/advice.

thanks in advance
Athir