Till Rohrmann created FLINK-5942:
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             Summary: Harden ZooKeeperStateHandleStore to deal with corrupted 
data
                 Key: FLINK-5942
                 URL: https://issues.apache.org/jira/browse/FLINK-5942
             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 {{ZooKeeperStateHandleStore}} cannot handle corrupted Znode data. When 
calling {{ZooKeeperStateHandleStore.getAll}} or {{getAllSortedByName}} and 
reading a node with corrupted data, the whole operation will fail. In such a 
situation, Flink won't be able to recover because it will read over and over 
again the same corrupted Znodes (in the recovery case). Therefore, I propose to 
ignore Znodes whose data cannot be read.



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