This is a "For what it is worth" message, since I think that your JVM upgrade was more to the point of solving the problem.
But, the permanent generation issue: First, reference Yoav's email response to somebody last month: http://marc.theaimsgroup.com/?l=tomcat-user&m=107590242329345&w=2 Every time a context is restarted, there is a possibility that there will be some classloader objects that the JVM doesn't think it can dispose of. These are stored in the "permanent generation" memory. The perm gen is a small pool of memory just for this purpose - objects that will never be garbage collected. But, if the permanent gen fills up from these constant reloads you can get an OutOfMemoryException even though the old and new generation memory pools are not full. I think there was something about the memory not being able to go away because it was loaded by a classloader that was loading items to be shared by all web applications, so in other words from jar files in shared\lib or common\lib Once again, that doesn't seem to be your problem, especially if you are not reloading the context repeatedly. >>> [EMAIL PROTECTED] 3/25/04 6:07:28 PM >>> I'd say the activity is moderate. Some 6-10 users would be using our web application during that time. The machine is better than a development machine but not as good as production one. Jeff, can you explain more about the -- JVM's "permanent generation". Thanks. - SPS ----- Original Message ----- From: "Jeff Tulley" <[EMAIL PROTECTED]> Date: Thursday, March 25, 2004 7:59 pm Subject: Re: Tomcat Hangs > What kind of activity is going on with this server during those two > hours? Heavy, moderate, light load? Is it a development box or > production? > > I ask the last question, since some have seen a problelm with repeated > redeploys of a web application, where the JVM's "permanent generation" > memory is running out even though the rest of the memory pools are > nowhere near full. > > Jeff Tulley ([EMAIL PROTECTED]) > (801)861-5322 > Novell, Inc., The Leading Provider of Net Business Solutions > http://www.novell.com > > >>> [EMAIL PROTECTED] 3/25/04 5:50:42 PM >>> > We have Tomcat 4.1.27 running in conjunction with Apache 1.3.x. > We're > using AJP13 connector. The machine that we're using has got over > 2GB of > > Memory and good processor speed. Tomcat has been allocated 1 GB of max > > memory. > > The issue is: For every two hours or so Tomcat hangs. That means, > Tomcat don't crash but simply don't accept any more connections. While Jeff Tulley ([EMAIL PROTECTED]) (801)861-5322 Novell, Inc., The Leading Provider of Net Business Solutions http://www.novell.com --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
