[jboss-user] [JBossCache] - AsyncCacheLoader crashes

[Thibaut Bodart]

Hi...

We are currently facing the following problem in production.

We use a TreeCache combined with a SleepyCat cache loader. The Cache loader is writing asynchronously the data to SleepyCat.

After a while, it seems that the AsyncCacheLoader thread dies after the following, which seems to be a serialization issue:

Exception in thread "AsyncCacheLoader-1" java.lang.StackOverflowError 
       at java.io.ObjectStreamClass.getClassDataLayout(ObjectStreamClass.java:1052) 
       at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1321) 
       at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) 
       at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) 
       at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369) 
       at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341) 
       at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) 
       at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) 
       at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291) 
       at java.util.ArrayList.writeObject(ArrayList.java:570) 
       at sun.reflect.GeneratedMethodAccessor32.invoke(Unknown Source) 
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
       at java.lang.reflect.Method.invoke(Method.java:585) 
       at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890) 
       at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333) 
       at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) 
       at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) 
       at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369) 
       at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341) 
       at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) 
       at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) 
       at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291) 
       at java.util.ArrayList.writeObject(ArrayList.java:570) 
       at sun.reflect.GeneratedMethodAccessor32.invoke(Unknown Source) 
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
       at java.lang.reflect.Method.invoke(Method.java:585) 
       at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890) 
       at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333) 
       at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) 
       at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) 
       at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369) 
       at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341) 
       at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) 
       at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) 
       at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369) 
       at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341) 
       at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284) 
       at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073) 
       at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291) 
       at java.util.ArrayList.writeObject(ArrayList.java:570) 
.... 


A few minutes after the crash of the thread, the application hangs since the queue is full and all the threads are blocked on the following:
EDU.oswego.cs.dl.util.concurrent.BoundedLinkedQueue.put(Unknown Source)        org.jboss.cache.loader.AsyncCacheLoader.enqueue(AsyncCacheLoader.java:326) 
       org.jboss.cache.loader.AsyncCacheLoader.put(AsyncCacheLoader.java:211)


Did anybody face a similar issue ? We can not explain this serialization issue that crashes that cache loader thread.

Thanks a lot for your support,

Thibaut 

View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3983455#3983455

Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3983455