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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-8125) Support limiting the number of open FileSystem connections
Date Thu, 23 Nov 2017 14:03:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-8125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16264370#comment-16264370
] 

ASF GitHub Bot commented on FLINK-8125:
---------------------------------------

Github user StephanEwen commented on the issue:

    https://github.com/apache/flink/pull/5059
  
    It does not yet remove all checkstyle violation, no. 


> Support limiting the number of open FileSystem connections
> ----------------------------------------------------------
>
>                 Key: FLINK-8125
>                 URL: https://issues.apache.org/jira/browse/FLINK-8125
>             Project: Flink
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Stephan Ewen
>            Assignee: Stephan Ewen
>             Fix For: 1.5.0, 1.4.1
>
>
> We need a way to limit the number of streams that Flink FileSystems concurrently open.
> For example, for very small HDFS clusters with few RPC handlers, a large Flink job trying
to build up many connections during a checkpoint causes failures due to rejected connections.

> I propose to add a file system that can wrap another existing file system The file system
may track the progress of streams and close streams that have been inactive for too long,
to avoid locked streams of taking up the complete pool.



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