Tomcat on production server, PermGen and redeploys

java tomcat out-of-memory permgen redeploy
Piotr Gwiazda picture Piotr Gwiazda · Aug 19, 2010 · Viewed 8k times · Source

It looks like 

 MemoryError: PermGen space
 java.lang.OutOfMemoryError: PermGen space

is a common problem. You can Increase the size of your perm space, but after 100 or 200 redeploys it will be full. Tracking ClassLoader memory leaks is nearly impossible.

What are your methods for Tomcat (or another simple servlet container - Jetty?) on production server? Is server restart after each deploy a solution?

Do you use one Tomcat for many applications ?

Maybe I should use many Jetty servers on different ports (or an embedded Jetty) and do undeploy/restart/deploy each time ?

Answer

Adam Butler picture Adam Butler · Aug 20, 2010

I gave up on using the tomcat manager and now always shutdown tomcat to redeploy.

We run two tomcats on the same server and use apache webserver with mod_proxy_ajp so users can access both apps via the same port 80. This is nice also because the users see the apache Service Unavailable page when the tomcat is down.

Related questions

How to deploy a war file in Tomcat 7

I have copied the sample.war file into the webapps directory of Tomcat, and I can access localhost:8080. Now how will Tomcat deploy it, I mean do I need to open it in browser? How can I access the application?

Read More
Several ports (8005, 8080, 8009) required by Tomcat Server at localhost are already in use

I'm getting the following error when I try to run a simple JSP program on Tomcat in Eclipse. Several ports (8005, 8080, 8009) required by Tomcat v6.0 Server at localhost are already in use. The server may already be running in another process, …

Read More
Tomcat 404 error: The origin server did not find a current representation for the target resource or is not willing to disclose that one exists

I was following the tutorial on o7planning and got stuck at step 6: http://o7planning.org/en/10169/java-servlet-tutorial It's just a simple project that show HelloWorld but for some reason I keep getting 404 error. Detail: However the Tomcat welcome …

Read More