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Posted to issues@flink.apache.org by "Stephan Ewen (JIRA)" <ji...@apache.org> on 2016/09/27 15:20:20 UTC

[jira] [Closed] (FLINK-4696) Limit the number of Akka Dispatcher Threads in LocalMiniCluster

     [ https://issues.apache.org/jira/browse/FLINK-4696?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephan Ewen closed FLINK-4696.
-------------------------------

> Limit the number of Akka Dispatcher Threads in LocalMiniCluster
> ---------------------------------------------------------------
>
>                 Key: FLINK-4696
>                 URL: https://issues.apache.org/jira/browse/FLINK-4696
>             Project: Flink
>          Issue Type: Bug
>          Components: Distributed Coordination
>    Affects Versions: 1.2.0
>            Reporter: Stephan Ewen
>            Assignee: Stephan Ewen
>             Fix For: 1.2.0
>
>
> By default, akka spawns 2x or 3x the number of cores in threads.
> For the LocalFlinkMiniCluster, running on Travis (often 64 cores), with separate actor systems for jobmanager and multiple taskmanagers, this frequetly means >600 akka threads. Flink uses about 4 actors.
> This simply eats unnecessary resources. I suggest to have at most 4 threads per actor system in test setups.



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