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Posted to dev@flink.apache.org by "Stefan Richter (JIRA)" <ji...@apache.org> on 2016/12/14 13:15:58 UTC

[jira] [Created] (FLINK-5337) Introduce backwards compatible state to task assignment

Stefan Richter created FLINK-5337:
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             Summary: Introduce backwards compatible state to task assignment
                 Key: FLINK-5337
                 URL: https://issues.apache.org/jira/browse/FLINK-5337
             Project: Flink
          Issue Type: Sub-task
            Reporter: Stefan Richter


Flink assigns state to tasks through either a) user defined uids or b) uids generated through hashing certain properties of the StreamingJobGraph.

While method a) is backwards compatible, it can be tedious for the user. Method b) easily breaks w.r.t. backwards compatibility under any changes to graph generation, e.g. when removing chaining.

We should think about a backwards compatible way assigning state to tasks, that hopefully works without explicit uid assignment by the user.



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