[jira] [Updated] (ARTEMIS-312) Artemis clients use by default an unbounded global thread pool

["clebert suconic (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARTEMIS-312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

clebert suconic updated ARTEMIS-312:
------------------------------------
    Assignee: Martyn Taylor  (was: Justin Bertram)

> Artemis clients use by default an unbounded global thread pool
> --------------------------------------------------------------
>
>                 Key: ARTEMIS-312
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-312
>             Project: ActiveMQ Artemis
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 1.1.0
>            Reporter: Jeff Mesnil
>            Assignee: Martyn Taylor
>
> While investigating some performance issues, we noticed that Artemis clients (including MDBs) use by default a "global" pool by creating a cached thread pool with 0 core pool size, Integer.MAX_VALUE max size and 60s keep alive.
> This default global pool looks misconfigured. If a Artemis clients has a lot of activity it is actually possible that threads are deleted from the pool and added back.
> Related to this, Artemis defines a threadPoolMaxSize attribute if the client is not using a global pool. But the property does not seem to be well name.
> If the Artemis client is using a "non-global" pool, this property is used to create a newFixedThreadPool. So this property defines the actual size of the pool, not a max size.
> As a comparison, the "global" scheduled thread is instantiating with a 5 core pool size.



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