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From "Stephan Ewen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1953) Rework Checkpoint Coordinator
Date Wed, 29 Apr 2015 09:56:06 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14519058#comment-14519058
] 

Stephan Ewen commented on FLINK-1953:
-------------------------------------

First part implemented in 7f0ce1428bc32181d6d79ca6f1226b9e2e3d93be

> Rework Checkpoint Coordinator
> -----------------------------
>
>                 Key: FLINK-1953
>                 URL: https://issues.apache.org/jira/browse/FLINK-1953
>             Project: Flink
>          Issue Type: Bug
>          Components: Streaming
>    Affects Versions: 0.9
>            Reporter: Stephan Ewen
>            Assignee: Stephan Ewen
>             Fix For: 0.9
>
>
> The checkpoint coordinator currently contains no tests and is vulnerable to a variety
of situations. In particular, I propose to add:
>  - Better configurability which tasks receive the trigger checkpoint messages, which
tasks need to acknowledge the checkpoint, and which tasks need to receive confirmation messages.
>  - checkpoint timeouts, such that incomplete checkpoints are guaranteed to be cleaned
up after a while, regardless of successful checkpoints
>  - better sanity checking of messages and fields, to properly handle/ignore messages
for old/expired checkpoints, or invalidly routed messages
>  - Better handling of checkpoint attempts at points where the execution has just failed
is is currently being canceled.
>  - Add a good set of tests



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