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https://issues.apache.org/jira/browse/FLINK-6742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16062973#comment-16062973
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ASF GitHub Bot commented on FLINK-6742:
---------------------------------------
GitHub user zentol opened a pull request:
https://github.com/apache/flink/pull/4185
[FLINK-6742] Add eager checks for parallelism/chain-length change
This is a follow-up to #4083 that adds checks to the savepoint migration
for any change in parallelism or chain length.
Should be merged for 1.3 and 1.4.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zentol/flink 6742_2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4185.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 #4185
----
commit 7f95bc69e4aced1ca1d89c1cbc2067150f5f583b
Author: zentol <ches...@apache.org>
Date: 2017-06-26T11:38:54Z
[FLINK-6742] Add eager checks for parallelism/chain-length change
----
> Improve error message when savepoint migration fails due to task removal
> ------------------------------------------------------------------------
>
> Key: FLINK-6742
> URL: https://issues.apache.org/jira/browse/FLINK-6742
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Affects Versions: 1.3.0
> Reporter: Gyula Fora
> Assignee: Chesnay Schepler
> Priority: Minor
> Labels: flink-rel-1.3.1-blockers
>
> Caused by: java.lang.NullPointerException
> at
> org.apache.flink.runtime.checkpoint.savepoint.SavepointV2.convertToOperatorStateSavepointV2(SavepointV2.java:171)
> at
> org.apache.flink.runtime.checkpoint.savepoint.SavepointLoader.loadAndValidateSavepoint(SavepointLoader.java:75)
> at
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.restoreSavepoint(CheckpointCoordinator.java:1090)
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