[jira] [Created] (FLINK-6052) Potential null access in ZooKeeperCompletedCheckpointStore#getLatestCheckpoint()

[Shang Yuanchun (Jira)]

Ted Yu created FLINK-6052:
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             Summary: Potential null access in ZooKeeperCompletedCheckpointStore#getLatestCheckpoint()
                 Key: FLINK-6052
                 URL: https://issues.apache.org/jira/browse/FLINK-6052
             Project: Flink
          Issue Type: Bug
            Reporter: Ted Yu
            Priority: Minor


{code}
        Tuple2<RetrievableStateHandle<CompletedCheckpoint>, String> checkpointStateHandle = checkpointStateHandles.peekLast();

        try {
          return retrieveCompletedCheckpoint(checkpointStateHandle);
        } catch (Exception e) {
          LOG.warn("Could not retrieve latest checkpoint. Removing it from " +
            "the completed checkpoint store.", e);

          try {
            // remove the checkpoint with broken state handle
            removeBrokenStateHandle(checkpointStateHandles.pollLast());
          } catch (Exception removeException) {
{code}
The code should handle the case where peekLast() / pollLast() returns null.



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