[jboss-jira] [JBoss JIRA] Updated: (JBMESSAGING-1488) ConcurrentModificationException on SessionFActory

[Clebert Suconic (JIRA)]

     [ https://jira.jboss.org/jira/browse/JBMESSAGING-1488?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Clebert Suconic updated JBMESSAGING-1488:
-----------------------------------------

        Summary: ConcurrentModificationException on SessionFActory  (was: ConcurrentModificationException if MultipleThreads are creating Connections simultaneously)
    Description: 
The following test would throw a ConcurrentModificationException,

It failed on a SessionFactory with backup properties, but I believe it would fail without the Failover set also:

   public void testFactory() throws Exception
   {

     final ClientSessionFactory factory = createFailoverFactory(); // Just a regular factory with Backup configured
     
     for (int i = 0; i < 2; i++)
     {
        ClientSession sessions[] = new ClientSession[10];
        for (int j = 0; j < 10; j++)
        {
           sessions[j] = factory.createSession(false, true, true);
           sessions[j].start();
        }
        
        for (ClientSession session: sessions)
        {
           session.close();
        }
        
     }
      
   }


exception is thrown:


MessagingException[errorCode=0 message=Failed to create session]
	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.createSession(ConnectionManagerImpl.java:335)
	at org.jboss.messaging.core.client.impl.ClientSessionFactoryImpl.createSessionInternal(ClientSessionFactoryImpl.java:846)
	at org.jboss.messaging.core.client.impl.ClientSessionFactoryImpl.createSession(ClientSessionFactoryImpl.java:576)
	at org.jboss.messaging.tests.integration.cluster.failover.PagingFailoverTest$1Consumer.run(PagingFailoverTest.java:330)
Caused by: java.util.ConcurrentModificationException
	at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
	at java.util.LinkedHashMap$ValueIterator.next(LinkedHashMap.java:388)
	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.getConnection(ConnectionManagerImpl.java:809)
	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.getConnectionForCreateSession(ConnectionManagerImpl.java:427)
	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.createSession(ConnectionManagerImpl.java:243)
	... 3 more


  was:
When you have several threads doing this:

Thread
   run
        Session s = factory.createSession(....);
         s.start();


This following exception is thrown:


MessagingException[errorCode=0 message=Failed to create session]
	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.createSession(ConnectionManagerImpl.java:335)
	at org.jboss.messaging.core.client.impl.ClientSessionFactoryImpl.createSessionInternal(ClientSessionFactoryImpl.java:846)
	at org.jboss.messaging.core.client.impl.ClientSessionFactoryImpl.createSession(ClientSessionFactoryImpl.java:576)
	at org.jboss.messaging.tests.integration.cluster.failover.PagingFailoverTest$1Consumer.run(PagingFailoverTest.java:330)
Caused by: java.util.ConcurrentModificationException
	at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
	at java.util.LinkedHashMap$ValueIterator.next(LinkedHashMap.java:388)
	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.getConnection(ConnectionManagerImpl.java:809)
	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.getConnectionForCreateSession(ConnectionManagerImpl.java:427)
	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.createSession(ConnectionManagerImpl.java:243)
	... 3 more




> ConcurrentModificationException on SessionFActory
> -------------------------------------------------
>
>                 Key: JBMESSAGING-1488
>                 URL: https://jira.jboss.org/jira/browse/JBMESSAGING-1488
>             Project: JBoss Messaging
>          Issue Type: Bug
>            Reporter: Clebert Suconic
>            Assignee: Clebert Suconic
>             Fix For: 2.0.0 Beta
>
>
> The following test would throw a ConcurrentModificationException,
> It failed on a SessionFactory with backup properties, but I believe it would fail without the Failover set also:
>    public void testFactory() throws Exception
>    {
>      final ClientSessionFactory factory = createFailoverFactory(); // Just a regular factory with Backup configured
>      
>      for (int i = 0; i < 2; i++)
>      {
>         ClientSession sessions[] = new ClientSession[10];
>         for (int j = 0; j < 10; j++)
>         {
>            sessions[j] = factory.createSession(false, true, true);
>            sessions[j].start();
>         }
>         
>         for (ClientSession session: sessions)
>         {
>            session.close();
>         }
>         
>      }
>       
>    }
> exception is thrown:
> MessagingException[errorCode=0 message=Failed to create session]
> 	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.createSession(ConnectionManagerImpl.java:335)
> 	at org.jboss.messaging.core.client.impl.ClientSessionFactoryImpl.createSessionInternal(ClientSessionFactoryImpl.java:846)
> 	at org.jboss.messaging.core.client.impl.ClientSessionFactoryImpl.createSession(ClientSessionFactoryImpl.java:576)
> 	at org.jboss.messaging.tests.integration.cluster.failover.PagingFailoverTest$1Consumer.run(PagingFailoverTest.java:330)
> Caused by: java.util.ConcurrentModificationException
> 	at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
> 	at java.util.LinkedHashMap$ValueIterator.next(LinkedHashMap.java:388)
> 	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.getConnection(ConnectionManagerImpl.java:809)
> 	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.getConnectionForCreateSession(ConnectionManagerImpl.java:427)
> 	at org.jboss.messaging.core.client.impl.ConnectionManagerImpl.createSession(ConnectionManagerImpl.java:243)
> 	... 3 more

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