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Posted to issues@flink.apache.org by "Tao Wang (JIRA)" <ji...@apache.org> on 2017/04/11 11:39:41 UTC

[jira] [Assigned] (FLINK-6295) use LoadingCache instead of WeakHashMap to lower latency

     [ https://issues.apache.org/jira/browse/FLINK-6295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tao Wang reassigned FLINK-6295:
-------------------------------

    Assignee: Tao Wang

> use LoadingCache instead of WeakHashMap to lower latency
> --------------------------------------------------------
>
>                 Key: FLINK-6295
>                 URL: https://issues.apache.org/jira/browse/FLINK-6295
>             Project: Flink
>          Issue Type: Bug
>          Components: Webfrontend
>            Reporter: Tao Wang
>            Assignee: Tao Wang
>
> Now in ExecutionGraphHolder, which is used in many handlers, we use a WeakHashMap to cache ExecutionGraph(s), which is only sensitive to garbage collection.
> The latency is too high when JVM do GC rarely, which will make status of jobs or its tasks unmatched with the real ones.
> LoadingCache is a common used cache implementation from guava lib, we can use its time based eviction to lower latency of status update.



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