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I know that this is not "best practice" but I would like to know if I can auto restart tomcat if my deployed app throws an outofmemory exception
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In other words if an OOME is thrown in an application server (jboss/websphere/..) do I have to restart it? No you don't have to restart. But it is probably wise to, especially if you don't have a good / automated way of checking that the service is running correctly. The JVM will recover just fine.
Apache Tomcat is a Java servlet container, and is run on a Java Virtual Machine, or JVM. Tomcat utilizes the Java servlet specification to execute servlets generated by requests, often with the help of JSP pages, allowing dynamic content to be generated much more efficiently than with a CGI script.
The Tomcat server is run within a Java Virtual Machine (JVM). This JVM that controls the amount of memory available to LabKey Server. LabKey recommends that the Tomcat web application be configured to have a maximum Java Heap size of at least 2GB for a test server, and at least 4GB for a production server.
ExitOnOutOfMemoryError. When you enable this option, the JVM exits on the first occurrence of an out-of-memory error. It can be used if you prefer restarting an instance of the JVM rather than handling out of memory errors. Format.
You can try to use the OnOutOfMemoryError JVM option
-XX:OnOutOfMemoryError="/yourscripts/tomcat-restart" It is also possible to generate the heap dump for later analysis:
-XX:+HeapDumpOnOutOfMemoryError Be careful with combining these two options. If you force killing the process in "tomcat-restart" the heap dump might not be complete.
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