[jboss-remoting-issues] [JBoss JIRA] Created: (JBREM-1169) Bisocket connection won't be closed if pulling out the ethernet cable between client and server. The failure detection code won't close the failure connection, as a result, the subsequent requests will hang after connection account exceeds the threshold

[mingjun jiang (JIRA)]

Bisocket connection won't be closed if pulling out the ethernet cable between client and server. The failure detection code won't close the failure connection, as a result, the subsequent requests will hang after connection account exceeds the threshold
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                 Key: JBREM-1169
                 URL: https://jira.jboss.org/jira/browse/JBREM-1169
             Project: JBoss Remoting
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: detection
    Affects Versions: 2.2.3.SP1
         Environment: OS: Windows Server 2003. JBoss App Server 4.2.3.GA, JBoss Messaging 1.4.5 GA,  JBoss Remoting 2.2.3 SP1
            Reporter: mingjun jiang


We are using JBoss App Server 4.2.3.GA, JBoss Messaging 1.4.5 GA and JBoss Remoting 2.2.3 SP1.  In our application, there are a lot of Message listeners running on the client side, these message listeners will receive messages from queue/topic deployed in JBoss Messaging  


Configuration:

We created our own JMS Connection factory which uses the default remoting connector. As you know, the default remoting connector is configured to use the bisocket transport. We didn't change the default value of the remoting connector

During we run our application, we open the JBoss web console to monitor the value of currentClientPoolSize under "Jboss.remoting" JMX MBean.
 

How to reproduce this issue:

1.        Run 5 message listeners in the client side to receive messages from JBoss Messaging, then we observe the value of currentClientPoolSize is 10

2.        After processing several messages, we manually pull out the ethernet cable. The value of currentClientPoolSize is still 10. 

3.        We run another 5 message listeners in client side, then the value of currentClientPoolSize will become 20

4.        After we do the same operations above several times, the value of currentClientPoolSize will increase continuously. Once the value of currentClientPoolSize is equal to the MaxPoolSize, then the subsequent incoming client requests will hang, and we will encounter the following exception in server side  

       2009-10-20 18:08:09,655 ERROR [org.jboss.remoting.transport.socket.ServerThread] Worker thread initialization failure

java.net.SocketException: Connection reset

      at java.net.SocketInputStream.read(SocketInputStream.java:168)

      at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)

      at java.io.BufferedInputStream.read(BufferedInputStream.java:235)

      at java.io.FilterInputStream.read(FilterInputStream.java:66)

      at org.jboss.remoting.transport.socket.ServerThread.readVersion(ServerThread.java:859)

      at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:545)

      at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:406)

      at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:173)


Conclusion: JBoss Messaging won't close the failure connections if they are caused by manually pulling out ethernet cable. As a result, the value of currentClientPoolSize will increase continuously and finally the new client requests will hang

Note:  If we killed the process of message listener in client side, then the value of currentClientPoolSize will decrease to 0 immediately, it seems that the server could detect the failure connection and perform the corresponding resource releasing.




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