[jira] [Commented] (FLINK-2929) Recovery of jobs on cluster restarts

["Aljoscha Krettek (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-2929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14976712#comment-14976712 ] 

Aljoscha Krettek commented on FLINK-2929:
-----------------------------------------

I think we have to fix it, yes. I'm not sure which should be the default behavior though. I gravitate towards making recovery of old jobs the default. But I see how it could be confusing...

> Recovery of jobs on cluster restarts
> ------------------------------------
>
>                 Key: FLINK-2929
>                 URL: https://issues.apache.org/jira/browse/FLINK-2929
>             Project: Flink
>          Issue Type: Improvement
>    Affects Versions: 0.10
>            Reporter: Ufuk Celebi
>
> Recovery information is stored in ZooKeeper under a static root like {{/flink}}. In case of a cluster restart without canceling running jobs old jobs will be recovered from ZooKeeper.
> This can be confusing or helpful depending on the use case.
> I suspect that the confusing case will be more common.
> We can change the default cluster start up (e.g. new YARN session or new ./start-cluster call) to purge all existing data in ZooKeeper and add a flag to not do this if needed.
> [~trohrmann@apache.org], [~aljoscha], [~StephanEwen] what's your opinion?



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