[
https://issues.apache.org/jira/browse/AMQ-3885?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dejan Bosanac reassigned AMQ-3885:
----------------------------------
Assignee: Dejan Bosanac
> ActiveMQ java client doesn't scale to thousands of queues
> ---------------------------------------------------------
>
> Key: AMQ-3885
> URL: https://issues.apache.org/jira/browse/AMQ-3885
> Project: ActiveMQ
> Issue Type: Bug
> Components: Connector
> Affects Versions: 5.6.0
> Environment: core i7 laptop running win7 64bit with 8gb of ram
> Reporter: Matan Zruya
> Assignee: Dejan Bosanac
> Labels: ActiveMQConnection, TaskRunnerFactory, client, java
>
> The ActiveMQ broker scales to tens of thousands of queues easily when using
> -Dorg.apache.activemq.UseDedicatedTaskRunner=false (false by default).
> A problem actually arises in the java client side, when a client is listening
> to X queues using 1 connection and Y sessions per queue, using a JMS message
> listener, X * Y threads will be created, when X * Y is not bounded,
> This is because each ActiveMQConnection object holds a TaskRunnerFactory
> which in turn has a ThreadPoolExecutor, the max pool size of the executor is
> defined to be Integer.MAX_VALUE, with the combination of a SynchronousQueue
> it creates as many threads as it pleases.
> the behavior of the executor is dependent on min pool size, core pool size,
> queue impl and rejection policy
> a few options to handle this :
> 1. the default rejection policy throws an exception which is not handled,
> ThreadPoolExecutor.CallerRunsPolicy sounds better then the default
> 2. Change the queue impl to LinkedBlockingQueue and change the core pool size
> to a bounded value
> 3. Provide the means to supply an external executor to be shared in the app
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
