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https://issues.apache.org/jira/browse/FLINK-5290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15732273#comment-15732273
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ASF GitHub Bot commented on FLINK-5290:
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GitHub user StefanRRichter opened a pull request:
https://github.com/apache/flink/pull/2966
[FLINK-5290] Ensure backwards compatibility of the hashes used to gen…
The way in which hashes for JobVertexIds are generated changed between
Flink 1.1 and 1.2 (parallelism was considered for the hash in 1.1). We need to
be backwards compatible to old JobVertexId generation so that we can still
assign state from old savepoints.
This PR introduced backwards compatibility for hashes, by considering
alternative hashes through different ``StreamGraphHasher`` implementations.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/StefanRRichter/flink
job-vertex-hash-backwards-compatibility
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/2966.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 #2966
----
commit dd84dd393be8f4c470b0087841bb4b681f67430b
Author: Stefan Richter <s.rich...@data-artisans.com>
Date: 2016-12-08T13:03:47Z
[FLINK-5290] Ensure backwards compatibility of the hashes used to generate
JobVertexIds
----
> Ensure backwards compatibility of the hashes used to generate JobVertexIds
> --------------------------------------------------------------------------
>
> Key: FLINK-5290
> URL: https://issues.apache.org/jira/browse/FLINK-5290
> Project: Flink
> Issue Type: Sub-task
> Components: State Backends, Checkpointing
> Reporter: Stefan Richter
> Assignee: Stefan Richter
>
> The way in which hashes for JobVertexIds are generated changed between Flink
> 1.1 and 1.2 (parallelism was considered for the hash in 1.1). We need to be
> backwards compatible to old JobVertexId generation so that we can still
> assign state from old savepoints.
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