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From "Till Rohrmann (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-5940) ZooKeeperCompletedCheckpointStore cannot handle broken state handles
Date Wed, 01 Mar 2017 15:43:45 GMT
Till Rohrmann created FLINK-5940:
------------------------------------

             Summary: ZooKeeperCompletedCheckpointStore cannot handle broken state handles
                 Key: FLINK-5940
                 URL: https://issues.apache.org/jira/browse/FLINK-5940
             Project: Flink
          Issue Type: Bug
          Components: State Backends, Checkpointing
    Affects Versions: 1.1.4, 1.2.0, 1.3.0
            Reporter: Till Rohrmann
            Assignee: Till Rohrmann


The {{ZooKeeperCompletedCheckpointStore}} reads a set of {{RetrievableStateHandles}} from
ZooKeeper upon recovery. It then tries to retrieve the {{CompletedCheckpoint}} from the latest
state handle. If the retrieve operation fails, then the whole recovery of completed checkpoints
fails even though the store might have read older state handles from ZooKeeper. 

I propose to harden the behaviour by removing broken state handles and returning the first
successfully retrieved {{CompletedCheckpoint}}.





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