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Posted to dev@activemq.apache.org by "Carl Allain (JIRA)" <ji...@apache.org> on 2009/10/09 18:18:52 UTC
[jira] Updated: (AMQ-2446) Client hangs on receive call with
timeout value > 0 when activemq is shutdown (CTRL-C)
[ https://issues.apache.org/activemq/browse/AMQ-2446?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Carl Allain updated AMQ-2446:
-----------------------------
Attachment: AMQ-2446-Test.zip
Contains an Eclipse 3.3 project.
> Client hangs on receive call with timeout value > 0 when activemq is shutdown (CTRL-C)
> --------------------------------------------------------------------------------------
>
> Key: AMQ-2446
> URL: https://issues.apache.org/activemq/browse/AMQ-2446
> Project: ActiveMQ
> Issue Type: Bug
> Affects Versions: 5.2.0
> Environment: Windows XP SP3, ActiveMQ 5.2, prefetchSize=0 (java.naming.provider.url = tcp://localhost:61616?jms.prefetchPolicy.queuePrefetch=0)
> Reporter: Carl Allain
> Attachments: AMQ-2446-Test.zip
>
>
> Start ActiveMQ
> create a message consumer and make a receive(30000) call for example.
> stop ActiveMQ (CTRL-C)
> There is an error reported on the console:
> 2009-10-08 19:23:54,978 [ActiveMQ Transport: tcp://localhost/127.0.0.1:61616] DEBUG org.apache.activemq.ActiveMQConnection - Async exception with no exception listener: java.io.EOFException
> java.io.EOFException
> at java.io.DataInputStream.readInt(DataInputStream.java:358)
> at org.apache.activemq.openwire.OpenWireFormat.unmarshal(OpenWireFormat.java:269)
> at org.apache.activemq.transport.tcp.TcpTransport.readCommand(TcpTransport.java:210)
> at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:202)
> at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:185)
> at java.lang.Thread.run(Thread.java:595)
> 2009-10-08 19:23:54,978 [ActiveMQ Connection Worker: tcp://localhost/127.0.0.1:61616] DEBUG org.apache.activemq.transport.tcp.TcpTransport - Stopping transport tcp://localhost/127.0.0.1:61616
> The thread making the receive call is waiting on a mutex that the ActiveMQ Connection Worker thread that reported that log has (I guess):
> class MessageDispatchChannel
> public MessageDispatch dequeue(long timeout) throws InterruptedException {
> synchronized (mutex) {
> // Wait until the consumer is ready to deliver messages.
> while (timeout != 0 && !closed && (list.isEmpty() || !running)) {
> if (timeout == -1) {
> mutex.wait(); <-----------------------------------------------------------
> } else {
> mutex.wait(timeout);
> break;
> }
> }
> if (closed || !running || list.isEmpty()) {
> return null;
> }
> return list.removeFirst();
> }
> }
> What is also strange to me is that my timeout of 30000 ms is silently converted to an infinite timeout if the preFetchSize == 0 by this code? Why?
> class ActiveMQMessageConsumer
> ...
> MessageDispatch md;
> if (info.getPrefetchSize() == 0) {
> md = dequeue(-1); // We let the broker let us know when we
> // timeout.
> } else {
> md = dequeue(timeout);
> }
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