6 Replies Latest reply on Dec 3, 2003 11:05 AM by gmccreath

    JBossMQ Hanging

    Ivan O. Parra Novice

      We were recently testing how solid or stand alone product communicates with JMS. We did this by turning on/off our product both normally and brutally(ie. don't allow to clean up, just STOP NOW!).

      What we found was interesting. Everytime we killed a JMSClient, we would recieve a stack trace like this:

      16:41:55,674 WARN [OILServerILService] Connection failure (1).
      java.net.SocketException: Connection reset by peer: JVM_recv in socket input stream read
      at java.net.SocketInputStream.socketRead(Native Method)
      at java.net.SocketInputStream.read(SocketInputStream.java:85)
      at java.io.BufferedInputStream.fill(BufferedInputStream.java:181)
      at java.io.BufferedInputStream.read(BufferedInputStream.java:199)
      at java.io.ObjectInputStream.peekCode(ObjectInputStream.java:1545)
      at java.io.ObjectInputStream.refill(ObjectInputStream.java:1679)
      at java.io.ObjectInputStream.read(ObjectInputStream.java:1655)
      at java.io.ObjectInputStream.readByte(ObjectInputStream.java:1901)
      at org.jboss.mq.il.oil.OILServerILService$Client.run(OILServerILService.java:205)
      at java.lang.Thread.run(Thread.java:479)
      16:41:55,674 WARN [OILServerILService] Connection failure (1).

      After doing this similar process a few times, the JMS Server acquires these characteristic:

      1) It is able to accept new JMS messages
      2) It does NOT process those messages to their MDB.

      Needless to say, the Queues start to grow.

      Attached are thread traces that show a dead lock scenario. It appears that a Message Pusher is waiting to read from a socket. At the same time, another thread (that which has a lock on the DestinationManager) is trying to close the socket.

      All other Workers who need access to the DestinationManager then have to wait for these threads to finish.(Which never happens).

      Attachment has a better explanation.



      If you close your JMS Connection correctly, this case apears to be avoided. BUT any of your JMS clients fails to close correctly, this process may hang JMS.