I switched to Google App Engine Java SDK 1.7.3 recently. Since then, I am running out of PermGen space every time I am submitting DeferredTasks into the task queue.
- This does not happen when the app is deployed to App Engine. It only happens locally. But it is blocking my local testing and failing integration tests.
It is happening on MacOSX 10.7.5 with Java 6
$ java -version java version "1.6.0_37" Java(TM) SE Runtime Environment (build 1.6.0_37-b06-434-11M3909) Java HotSpot(TM) 64-Bit Server VM (build 20.12-b01-434, mixed mode)And this is part of stacktrace I am seeing when the problem occurs.
INFO: Successfully processed ../target/projectName/WEB-INF/queue.xml Nov 1, 2012 3:04:00 PM com.google.appengine.api.taskqueue.dev.LocalTaskQueue init INFO: LocalTaskQueue is initialized Nov 1, 2012 3:04:01 PM org.quartz.simpl.SimpleThreadPool initialize INFO: Job execution threads will use class loader of thread: 1255545583@qtp-1458850232-0 Nov 1, 2012 3:04:02 PM org.quartz.core.QuartzScheduler <init> INFO: Quartz Scheduler v.UNKNOWN.UNKNOWN.UNKNOWN created. Nov 1, 2012 3:04:02 PM org.quartz.simpl.RAMJobStore initialize INFO: RAMJobStore initialized. Nov 1, 2012 3:04:02 PM org.quartz.impl.StdSchedulerFactory instantiate INFO: Quartz scheduler 'DefaultQuartzScheduler' initialized from default resource file in Quartz package: 'quartz.properties' Nov 1, 2012 3:04:02 PM org.quartz.impl.StdSchedulerFactory instantiate INFO: Quartz scheduler version: UNKNOWN.UNKNOWN.UNKNOWN Nov 1, 2012 3:04:02 PM org.quartz.core.QuartzScheduler start INFO: Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started. Nov 1, 2012 3:04:02 PM com.google.appengine.api.taskqueue.dev.LocalTaskQueue start_ INFO: Local task queue initialized with base url http://localhost:8083 Exception in thread "DefaultQuartzScheduler_Worker-9" java.lang.OutOfMemoryError: PermGen space at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at com.google.appengine.tools.development.DevAppServerClassLoader.loadClass(DevAppServerClassLoader.java:92) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at com.google.appengine.api.urlfetch.URLFetchServicePb$URLFetchRequest.newBuilder(URLFetchServicePb.java:1902) at com.google.appengine.api.taskqueue.dev.UrlFetchJob.newFetchRequest(UrlFetchJob.java:152) at com.google.appengine.api.taskqueue.dev.UrlFetchJob.execute(UrlFetchJob.java:83) at org.quartz.core.JobRunShell.run(JobRunShell.java:203) at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520) Exception in thread "1255545583@qtp-1458850232-0" java.lang.OutOfMemoryError: PermGen space Exception in thread "Timer-6" java.lang.OutOfMemoryError: PermGen space Exception in thread "Timer-4" java.lang.OutOfMemoryError: PermGen space Exception in thread "Timer-2" java.lang.OutOfMemoryError: PermGen space Exception in thread "Timer-8" java.lang.OutOfMemoryError: PermGen space
See below for the code that triggers the issue. The DeferredTask has a memcache reference to get data from memcache and potentially remove it. The task is running with a delay of 10 seconds.
class Foo {
private void enqueueTask() {
queue.add(TaskOptions.Builder.withPayload(new Task()).countdownMillis(10 * 1000));
}
private static class Task implements DeferredTask {
private static final MemcacheService memcache = MemcacheServiceFactory.getMemcacheService();
private static final Logger log = Logger.getLogger(Task.class.getName());
@Override
public void run() {
final String key = ...;
if (memcache.contains(key)) {
final Object value = memcache.get(key);
if (some condition depending on value) {
memcache.delete(key);
memcache.increment(some other field, -1l);
}
} else {
log.warning("error message");
}
}
}
}
Can somebody else reproduce this? Thanks!
Update: I created issue 8377 for this on the GAE's Google Code page.
