Any Limit on the Number of connection to JBoss Messaging Ser

[craig2007]

Hi
Just wanted to know is there is any limit in creating connection object(with invocation of start method on the connection object) to JBoss Messaging.
We are using jboss-messaging-1.0.1.GA.

1) I just wrote a program which created a connection object of around 2000.While going thru the log ,i cud able to get some exception.those exceptions did not stop the execution of the program in creating 2000 connection object.I did not do any operation on those connection object.
I just created and invoked start method on it.
Attached the exception seen at client and server side.
do let me know your fruitful reply!!

Exception seen at the client side
=================================

java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:120)
at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:86)
at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206)
at org.jboss.serial.persister.ObjectOutputStreamProxy.writeObjectOverride(ObjectOutputStreamProxy.java:60)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at java.util.HashMap.writeObject(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:120)
at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:86)
at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206)
at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182)
at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90)
at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206)
at org.jboss.serial.io.JBossObjectOutputStream.writeObjectOverride(JBossObjectOutputStream.java:181)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.sendObject(JavaSerializationManager.java:85)
at org.jboss.remoting.marshal.serializable.SerializableMarshaller.write(SerializableMarshaller.java:84)
at org.jboss.jms.server.remoting.JMSWireFormat.write(JMSWireFormat.java:310)
at org.jboss.remoting.transport.socket.MicroSocketClientInvoker.versionedWrite(MicroSocketClientInvoker.java:502)
at org.jboss.remoting.transport.socket.MicroSocketClientInvoker.transport(MicroSocketClientInvoker.java:340)
at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:125)
at org.jboss.remoting.LeasePinger.sendClientPing(LeasePinger.java:97)
at org.jboss.remoting.LeasePinger$LeaseTimerTask.run(LeasePinger.java:216)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
at java.util.HashMap$EntryIterator.next(Unknown Source)
at java.util.HashMap$EntryIterator.next(Unknown Source)
at java.util.HashMap.writeObject(Unknown Source)
... 36 more
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:120)
at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:86)
at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206)
at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithFields(RegularObjectPersister.java:182)
at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:90)
at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206)
at org.jboss.serial.io.JBossObjectOutputStream.writeObjectOverride(JBossObjectOutputStream.java:181)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.sendObject(JavaSerializationManager.java:85)
at org.jboss.remoting.marshal.serializable.SerializableMarshaller.write(SerializableMarshaller.java:84)
at org.jboss.jms.server.remoting.JMSWireFormat.write(JMSWireFormat.java:310)
at org.jboss.remoting.transport.socket.MicroSocketClientInvoker.versionedWrite(MicroSocketClientInvoker.java:502)
at org.jboss.remoting.transport.socket.MicroSocketClientInvoker.transport(MicroSocketClientInvoker.java:340)
at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:125)
at org.jboss.remoting.LeasePinger.sendClientPing(LeasePinger.java:97)
at org.jboss.remoting.LeasePinger$LeaseTimerTask.run(LeasePinger.java:216)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
Caused by: java.io.IOException
at org.jboss.serial.persister.RegularObjectPersister.writeSlotWithMethod(RegularObjectPersister.java:129)
at org.jboss.serial.persister.RegularObjectPersister.defaultWrite(RegularObjectPersister.java:86)
at org.jboss.serial.persister.RegularObjectPersister.writeData(RegularObjectPersister.java:62)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:276)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectOutput.writeObject(DataContainer.java:206)
at org.jboss.serial.persister.ObjectOutputStreamProxy.writeObjectOverride(ObjectOutputStreamProxy.java:60)







Exception seen at server side
=============================

19:10:18,503 INFO [Server] JBoss (MX MicroKernel) [4.0.4.GA (build: CVSTag=JBoss_4_0_4_GA date=200605151000)] Started in 33s:299ms
19:12:10,727 ERROR [ServerThread] failed
java.io.IOException
at org.jboss.serial.persister.RegularObjectPersister.readSlotWithMethod(RegularObjectPersister.java:107)
at org.jboss.serial.persister.RegularObjectPersister.defaultRead(RegularObjectPersister.java:269)
at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:241)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:412)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:82)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:643)
at org.jboss.serial.persister.RegularObjectPersister.readSlotWithFields(RegularObjectPersister.java:353)
at org.jboss.serial.persister.RegularObjectPersister.defaultRead(RegularObjectPersister.java:273)
at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:241)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:412)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:82)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:643)
at org.jboss.serial.io.JBossObjectInputStream.readObjectOverride(JBossObjectInputStream.java:163)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:333)
at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.receiveObject(JavaSerializationManager.java:132)
at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:66)
at org.jboss.jms.server.remoting.JMSWireFormat.read(JMSWireFormat.java:422)
at org.jboss.remoting.transport.socket.ServerThread.versionedRead(ServerThread.java:390)
at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:446)
at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:541)
at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:261)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor82.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.serial.persister.RegularObjectPersister.readSlotWithMethod(RegularObjectPersister.java:103)
... 20 more
Caused by: java.io.IOException
at org.jboss.serial.persister.RegularObjectPersister.readSlotWithMethod(RegularObjectPersister.java:107)
at org.jboss.serial.persister.RegularObjectPersister.defaultRead(RegularObjectPersister.java:269)
at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:241)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:412)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:82)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:643)
at org.jboss.serial.persister.ObjectInputStreamProxy.readObjectOverride(ObjectInputStreamProxy.java:68)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:333)
at java.util.HashMap.readObject(HashMap.java:1013)
... 24 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor82.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.serial.persister.RegularObjectPersister.readSlotWithMethod(RegularObjectPersister.java:103)
... 32 more
Caused by: java.io.IOException
at org.jboss.serial.persister.RegularObjectPersister.readSlotWithMethod(RegularObjectPersister.java:107)
at org.jboss.serial.persister.RegularObjectPersister.defaultRead(RegularObjectPersister.java:269)
at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:241)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:412)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:82)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:643)
at org.jboss.serial.persister.RegularObjectPersister.readSlotWithFields(RegularObjectPersister.java:353)
at org.jboss.serial.persister.RegularObjectPersister.defaultRead(RegularObjectPersister.java:273)
at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:241)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:412)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:82)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:643)
at org.jboss.serial.persister.ObjectInputStreamProxy.readObjectOverride(ObjectInputStreamProxy.java:68)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:333)
at java.util.HashMap.readObject(HashMap.java:1013)
... 36 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor82.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.serial.persister.RegularObjectPersister.readSlotWithMethod(RegularObjectPersister.java:103)
... 50 more
Caused by: java.io.EOFException
at java.io.DataInputStream.readByte(DataInputStream.java:243)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readByte(DataContainer.java:716)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:64)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:643)
at org.jboss.serial.persister.ObjectInputStreamProxy.readObjectOverride(ObjectInputStreamProxy.java:68)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:333)
at java.util.HashMap.readObject(HashMap.java:1013)
... 54 more
19:12:16,462 ERROR [SocketServerInvoker] Failed to accept socket connection
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at org.jboss.remoting.transport.socket.ServerThread.createServerSocket(ServerThread.java:202)
at org.jboss.remoting.transport.socket.ServerThread.wakeup(ServerThread.java:243)
at org.jboss.remoting.transport.socket.SocketServerInvoker.processInvocation(SocketServerInvoker.java:535)
at org.jboss.remoting.transport.socket.SocketServerInvoker.run(SocketServerInvoker.java:450)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.IOException: Mismatch version of JBossSerialization signature
at org.jboss.serial.io.JBossObjectInputStream.checkSignature(JBossObjectInputStream.java:113)
at org.jboss.serial.io.JBossObjectInputStream.(JBossObjectInputStream.java:94)
at org.jboss.remoting.serialization.impl.jboss.JBossSerializationManager.createInput(JBossSerializationManager.java:59)
at org.jboss.remoting.transport.socket.ServerSocketWrapper.createInputStream(ServerSocketWrapper.java:56)
at org.jboss.remoting.transport.socket.ClientSocketWrapper.createStreams(ClientSocketWrapper.java:76)
at org.jboss.remoting.transport.socket.ClientSocketWrapper.(ClientSocketWrapper.java:54)
at org.jboss.remoting.transport.socket.ServerSocketWrapper.(ServerSocketWrapper.java:50)
... 9 more

[timfox]

I believe this is a remoting bug that has been found and fixed by Clebert.

Clebert - can you confirm?

[clebert.suconic]

Yes... this is http://jira.jboss.com/jira/browse/JBREM-649


There is a hashMap on Lease...
Lease sends the hashMap to the server side by serialization.

If the map changes while the serialization happens.. I mean... if there is a new client connecting... a ConcurrentModificationException happens breaking the IO.

Remoting added synchronized to some blocks to avoid the concurrency.

This bug would also happen under regular java serialization.

[ovidiu.feodorov]

A fix for this will be available in 1.0.1.SP4, planned to go out some time next week.