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Posted to dev@qpid.apache.org by "Rob Godfrey (JIRA)" <ji...@apache.org> on 2013/12/09 21:38:07 UTC
[jira] [Resolved] (QPID-5385) Create/Close session in a loop
causing connection to be closed and connection.close to hang after that
[ https://issues.apache.org/jira/browse/QPID-5385?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rob Godfrey resolved QPID-5385.
-------------------------------
Resolution: Fixed
Fix Version/s: 0.27
Assignee: Rob Godfrey
> Create/Close session in a loop causing connection to be closed and connection.close to hang after that
> ------------------------------------------------------------------------------------------------------
>
> Key: QPID-5385
> URL: https://issues.apache.org/jira/browse/QPID-5385
> Project: Qpid
> Issue Type: Bug
> Components: Java Client
> Affects Versions: 0.24
> Reporter: Xin Chen
> Assignee: Rob Godfrey
> Fix For: 0.27
>
> Attachments: QPID-5385.patch
>
>
> sample test code:
> factory = ConnectionFactoryImpl.createFromURL(connectionUri);
> connection = factory.createConnection();
> connection.start();
> for (int i = 0; i < 10; i++)
> {
> session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
> session.close();
> }
> session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
> Destination destination = session.createQueue("q1");
> MessageProducer producer = session.createProducer(destination);
> session.close();
> connection.close();
> Issues observed:
> 1. ConnectionClosedException is thrown from connection.createSession(...)
> 2. SenderCreationException is thrown from session.createProcuder(...)
> 2. the last connection.close() can hang
> Root cause:
> connection.createSession(...) -> send a begin frame
> session.close() -> send an end frame and session is removed from connection's local session collection
> When the peer sends back a begin frame, no session can be found using begin.remote-channel so the connection is closed. This causes session/producer creation to fail.
> If the peer also sends another frame (e.g. flow), it generates a NullPointerException in ConnectionEndpoint.receiveFlow() because session is null. This exception is unhandled and the thread dies. Connection.close() hangs with the following stack:
> "main" prio=10 tid=0x00007f738400a000 nid=0x1508 in Object.wait() [0x00007f738cd20000]
> java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> - waiting on <0x00000007d7ba3ac8> (a org.apache.qpid.amqp_1_0.transport.ConnectionEndpoint)
> at java.lang.Object.wait(Object.java:503)
> at org.apache.qpid.amqp_1_0.client.Connection.close(Connection.java:430)
> - locked <0x00000007d7ba3ac8> (a org.apache.qpid.amqp_1_0.transport.ConnectionEndpoint)
> at org.apache.qpid.amqp_1_0.jms.impl.ConnectionImpl.close(ConnectionImpl.java:385)
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