Arvid Heise created FLINK-14480:
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Summary: Sort out exception supression during snapshotting for
non-running tasks.
Key: FLINK-14480
URL: https://issues.apache.org/jira/browse/FLINK-14480
Project: Flink
Issue Type: Bug
Components: Runtime / Checkpointing
Affects Versions: 1.10.0
Reporter: Arvid Heise
Following-up on Flink-14370.
As [~becket_qin] wrote: "The cause [of Flink-14370] was that when all the
records are processed before a snapshot was taken, the records that could not
be sent out trigger the snapshot to fail. That snapshot failure will not cause
the job to exit. However, all the records in the KafkaProducer are already
expired after the snapshot failure. So when the producer closes, there will be
no more exception thrown. Thus the job finished successfully.
It looks that the expected behavior from connector is to report exception in
{{close()}} method as long as there was a record that could not be sent. On the
other hand, exception thrown from {{CheckpointedFunction.snapshotState()}}
might be ignored. Not sure if this is reasonable, but this expectation is not
super clear from the connector implementation's perspective.
In terms of immediate fix, [~arvid.he...@gmail.com] proposes to always throw
exception as long as there has been a record sending failure. I agree that is
the right fix per current expected behavior on the connectors."
[~kkl0u], [~pnowojski] any other idea on how to resolve it?
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