[jboss-user] [JBoss Messaging] - Re: JBM clients hangs when creating connections/sessions

Daniel Dumitrescu [http://community.jboss.org/people/danezu] created the discussion "Re: JBM clients hangs when creating connections/sessions" To view the discussion, visit: http://community.jboss.org/message/645664#645664 -------------------------------------------------------------- Hi again After getting again the same situation a, I made a thread dump on the server side to see what is happening, and there were two types of blocked threads: - the JBM's get message count: "RMI TCP Connection(1910)-172.19.60.78" daemon prio=10 tid=0x00007f83f3aa3800 nid=0x1c12 waiting for monitor entry [0x0000000061f66000..0x0000000061f68b20]    java.lang.Thread.State: BLOCKED (on object monitor)         at org.jboss.messaging.core.impl.ChannelSupport.getMessageCount(ChannelSupport.java:480)         - waiting to lock <0x00007f840e9f3048> (a java.lang.Object)         at org.jboss.messaging.core.impl.PagingChannelSupport.getMessageCount(PagingChannelSupport.java:148) - the XA commits made from the remote client: WorkManager(2)-33444" daemon prio=10 tid=0x00007f83e85eb800 nid=0x1aa5 waiting for monitor entry [0x000000005f23a000..0x000000005f23bca0]    java.lang.Thread.State: BLOCKED (on object monitor)         at org.jboss.messaging.core.impl.ChannelSupport$InMemoryCallback.afterCommit(ChannelSupport.java:1025)         - waiting to lock <0x00007f840e9f3048> (a java.lang.Object)         at org.jboss.messaging.core.impl.tx.Transaction.commit(Transaction.java:228)         - locked <0x00007f84383f5cd0> (a org.jboss.messaging.core.impl.tx.Transaction)         at org.jboss.jms.server.endpoint.ServerConnectionEndpoint.sendTransaction(ServerConnectionEndpoint.java:517) All of the threads seems to be waiting for the same object lock:  <0x00007f840e9f3048> The blocking threads (like almost 400 of them) lead to unresponsive JMS queue. It seems that the getMessageCount and afterCommit are waiting for a lock that tryies to synch the situation inside JBM's table with the memory refs. Doesn anyone knows where I can find this lock, i.e. the concrete type? The following classes seems to use it: ServerConnectionEndpoint, org.jboss.messaging.core.impl.tx.Transaction, org.jboss.messaging.core.impl.ChannelSupport (->PagingChannelSupport -> MessagingQueue) Regards, -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/645664#645664] Start a new discussion in JBoss Messaging at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]