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https://issues.apache.org/jira/browse/FLINK-5985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15925786#comment-15925786
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ASF GitHub Bot commented on FLINK-5985:
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GitHub user StefanRRichter opened a pull request:
https://github.com/apache/flink/pull/3543
[FLINK-5985] [Backport for 1.2] Report no task states for stateless tasks
on checkpointing
This PR is a backport of #3523 to Flink 1.2.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/StefanRRichter/flink
FLINK-5985-backport-to-1.2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3543.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 #3543
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commit 0eb568152583a328c8e1342c94dd6dd2068bacbb
Author: Stefan Richter <[email protected]>
Date: 2017-03-14T15:37:02Z
[FLINK-5985] Report no task states for stateless tasks on checkpointing
----
> Flink treats every task as stateful (making topology changes impossible)
> ------------------------------------------------------------------------
>
> Key: FLINK-5985
> URL: https://issues.apache.org/jira/browse/FLINK-5985
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Affects Versions: 1.2.0
> Reporter: Gyula Fora
> Priority: Critical
>
> It seems that Flink treats every Task as stateful so changing the topology
> is not possible without setting uid on every single operator.
> If the topology has an iteration this is virtually impossible (or at least
> gets super hacky)
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