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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1968) Make Distributed Cache more robust
Date Mon, 04 May 2015 13:24:06 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14526617#comment-14526617
] 

ASF GitHub Bot commented on FLINK-1968:
---------------------------------------

GitHub user StephanEwen opened a pull request:

    https://github.com/apache/flink/pull/645

    [FLINK-1968] [runtime] Clean up and improve the distributed cache.

     - Gives a proper exception when a non-cached file is accessed
     - Forwards I/O exceptions that happen during file transfer, rather than only returning
null when transfer failed
     - Consistently keeps reference counts and copies only when needed
     - Properly removes all files when shutdown
     - Uses a shutdown hook to remove files when process is killed
    
    Build on top of pull request #643 

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/StephanEwen/incubator-flink fix_distcache

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/645.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #645
    
----
commit 76d63d5b03643d3c6e51a882eb9427e421806342
Author: Stephan Ewen <sewen@apache.org>
Date:   2015-04-30T20:05:27Z

    [streaming] New Source and state checkpointing interfaces that allow operations to interact
with the state checkpointing in a more precise manner.

commit 62e35a3e2322e6b66aba336319e5671d3cfaa2d1
Author: Stephan Ewen <sewen@apache.org>
Date:   2015-05-02T23:15:39Z

    [FLINK-1968] [runtime] Clean up and improve the distributed cache.
    
     - Gives a proper exception when a non-cached file is accessed
     - Forwards I/O exceptions that happen during file transfer, rather than only returning
null when transfer failed
     - Consistently keeps reference counts and copies only when needed
     - Properly removes all files when shutdown
     - Uses a shutdown hook to remove files when process is killed

----


> Make Distributed Cache more robust
> ----------------------------------
>
>                 Key: FLINK-1968
>                 URL: https://issues.apache.org/jira/browse/FLINK-1968
>             Project: Flink
>          Issue Type: Bug
>          Components: Local Runtime
>    Affects Versions: 0.9
>            Reporter: Stephan Ewen
>            Assignee: Stephan Ewen
>             Fix For: 0.9
>
>
> The distributed cache has a variety of issues at the moment.
>  - It does not give a proper exception when a non-cached file is accessed
>  - It swallows I/O exceptions that happen during file transfer and later only returns
null
>  - It keeps inonsistently reference counts and attempts to copy often, resolving this
via file collisions
>  - Files are not properly removes on shutdown
>  - No shutdown hook to remove files when process is killed



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