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https://issues.apache.org/jira/browse/AMQ-6156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15134423#comment-15134423
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Ger Lawlor commented on AMQ-6156:
---------------------------------
I've upgraded from 5.11.1 to 5.13.0 on suspicion that the error may have been
because the failover transport parameter documentation only related to latest
version. I also linked to the activemq-all.jar file from the 5.13.0
installation so as to ensure I was working with latest. I see the same outcome
with invalid connect parameters as per URL above.
> ActiveMQConnection threads in parked state during startup
> ---------------------------------------------------------
>
> Key: AMQ-6156
> URL: https://issues.apache.org/jira/browse/AMQ-6156
> Project: ActiveMQ
> Issue Type: Bug
> Components: Connector
> Affects Versions: 5.11.1
> Environment: Linux
> Reporter: Ger Lawlor
>
> I've implemented a JMS producer using
> org.apache.activemq.ActiveMQConnectionFactory API. In the deployment they are
> 10 threads launched and each thread invokes the following sequence of methods
> which wrap around the ActiveMQConnection API.
> connector = new ActiveMQConnect();
> connector.setEndPointURL(primaryURL, secondaryURL, connectorQueryString);
> connector.setCredentials(userName, password);
> connector.initializeConnection();
> connector.setDestinationQueue(queueName);
> connector.addMessageToQueue(message);
> connector.sendMessageToQueue();
> The call to initializeConnection in turn invokes the following code which
> returns the connection
> 1) ActiveMQConnectionFactory connectionFactory = new
> ActiveMQConnectionFactory(m_userName, m_password, m_endPointUrl);
> 2) m_queueConnection = connectionFactory.createConnection();
> 3) m_queueConnection.start();
> However, (and potentially under load), a large % of the threads enter the
> parked state and stay there. The stack trace for these threads is as follows:
> java.lang.Thread.State: WAITING
> at sun.misc.Unsafe.park(Native Method)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:118)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1841)
>
> at
> java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:341)
> at
> org.apache.activemq.transport.FutureResponse.getResult(FutureResponse.java:40)
>
> at
> org.apache.activemq.transport.ResponseCorrelator.request(ResponseCorrelator.java:80)
>
> at
> org.apache.activemq.ActiveMQConnection.syncSendPacket(ActiveMQConnection.java:1195)
>
> at
> org.apache.activemq.ActiveMQConnection.ensureConnectionInfoSent(ActiveMQConnection.java:1289)
>
> at
> org.apache.activemq.ActiveMQConnection.start(ActiveMQConnection.java:456)
> at ActiveMQConnect.initializeConnection(ActiveMQConnect.java:63)
> The JMS producer connects using failover transport to an active/passive or
> primary/failover configuration.
> Is the problem being caused by the failover URL? The documentation seemed to
> indicate that the failover URL can be sent with format:
> failover:(tcp://amq01:61616,tcp://amq02:61616)?queryString....
> Would appreciate any advice so I can resolve this issue.
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