Alexander Fedulov created FLINK-10753:
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Summary: Propagate and log snapshotting exceptions
Key: FLINK-10753
URL: https://issues.apache.org/jira/browse/FLINK-10753
Project: Flink
Issue Type: Bug
Components: State Backends, Checkpointing
Affects Versions: 1.6.2
Reporter: Alexander Fedulov
Attachments: Screen Shot 2018-11-01 at 16.27.01.png
Upon failure, {{AbstractStreamOperator.snapshotState}} rethrows a new exception
with the message "{{Could not complete snapshot {} for operator {}.}}" and the
original exception as the cause.
While handling the error, {{CheckpointCoordinator.discardCheckpoint}} method
logs only this propagated message and not the original cause of the exception.
In addition, {{pendingCheckpoint.abortDeclined()}}, called from the
{{discardCheckpoint,}}
reports the failed checkpoint with a misleading message "{{Checkpoint was
declined (tasks not ready)}}". This message is what will be displayed in the UI
(see attached).
Proposition:
# Log exception at the Task Manager (.snapshotState)
# Log cause, instead of cause.getMessage() at the JobsManager
(.dicardCheckpoint)
# Pass root cause to abortDeclined and propagate a more appropriate message to
the UI.
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