Till Rohrmann created FLINK-5940:
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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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