Arun Mahadevan created STORM-3292:
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Summary: Trident HiveState must flush writers when the batch
commits
Key: STORM-3292
URL: https://issues.apache.org/jira/browse/STORM-3292
Project: Apache Storm
Issue Type: Improvement
Reporter: Arun Mahadevan
For trident the hive writer is flushed only after it hits the batch size.
see -
https://github.com/apache/storm/blob/master/external/storm-hive/src/main/java/org/apache/storm/hive/trident/HiveState.java#L108
Trident HiveState does not flush during the batch commit and it appears to be
an oversight. Without this trident state cannot guarantee at-least once. (E.g.
if the transaction is open but trident moves to the next txid and later fails
the data in the open transaction is lost).
So I think for at-least once, the HiveState must flush all the writers
irrespective of the batch sizes when trident invokes the "commit(txid)" .
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