Hey Kurt, A question like this, of a technical nature on a specific issue, should instead be posted to Stack Overflow. This allows you to contact a much-wider group of potentially-helpful people, including a significant number of Googlers who monitor various sponsored tags there.
As for specific technical help which could help you either solve the issue or make a better post to Stack Overflow, here are some of my thoughts: - Have you investigated the common causes of this kind of issue, and do you have any potential insights in regard to the Java memory structure and PermGen space? - Can you inspect the memory load periodically, for example during the start and end of requests, etc.? - Could you provide more information about your most-likely memory-use patterns, or what kind of work you're doing? - What's causing you to dynamically generate classes like this? - Have you tried merely upgrading instance class? I wish you the best of luck in moving on to build a good Q&A for Stack Overflow, where you will find a significant user-base of people who can help. This forum is meant for more general discussion, not necessarily connected to specific issues. On Sunday, November 15, 2015 at 9:55:32 PM UTC-5, Kurt Hartmann wrote: > > My web module is using automatic scaling with the default F1 server > instance. Yesterday, I noticed a PermGen, Out of Memorry server exception > occurred in production. This concerns me, because my users receive a blank > screen when this error happens as the response to their web request, and it > will cause a lot of confusion. Also, my app is in a pilot phase and there > are just a couple of users and no load, so to receive a permgen, > OutOfMemory server exception means more could be on the way as things ramp > up. > > Is there a way to increase the max PermGen memory allocation on a google > app engine configuration? I've searched and not found anything about > changing the setting on a production app engine server (only development > server, which I've done successfully). If I change the server I'm using to > something with more memory (e.g. F2 server instance), will that help? I'm > assuming that even a higher memory server instance will still use the > default max permGen setting, so I don't think so. > > Thanks for letting me know how to reduce the possiblity of receiving these > OutOfMemory errors in production google app engine servers. > > Here's the stack trace of the error > > http://mydogscores.com/events/viewMyDogScoresCalendar > java.lang.OutOfMemoryError: PermGen space at > sun.misc.Unsafe.defineClass(Native Method) at > sun.reflect.ClassDefiner.defineClass(ClassDefiner.java:63) at > sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:399) > at > sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:396) > at java.security.AccessController.doPrivileged(Native Method) at > sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:395) > > at > sun.reflect.MethodAccessorGenerator.generateMethod(MethodAccessorGenerator.java:77) > > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:46) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > > at java.lang.reflect.Method.invoke(Method.java:606) at > java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017) at > java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2040) at > java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1936) > at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1462) at > java.io.ObjectInputStream.readObject(ObjectInputStream.java:417) at > java.util.HashMap.readObject(HashMap.java:1182) at > sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > > at java.lang.reflect.Method.invoke(Method.java:606) at > java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017) at > java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2040) at > java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1936) > at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1462) at > java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2140) at > java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2064) at > java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1936) > at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1462) at > java.io.ObjectInputStream.readObject(ObjectInputStream.java:417) at > com.google.apphosting.runtime.SessionManagerUtil.deserialize(SessionManagerUtil.java:56) > > at > com.google.apphosting.runtime.MemcacheSessionStore.getSession(MemcacheSessionStore.java:38) > > at > com.google.apphosting.runtime.jetty.SessionManager.loadSession(SessionManager.java:330) > > > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. 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