Tathagata Das created SPARK-20717:
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Summary: Tweak MapGroupsWithState update function behavior
Key: SPARK-20717
URL: https://issues.apache.org/jira/browse/SPARK-20717
Project: Spark
Issue Type: Sub-task
Components: Structured Streaming
Affects Versions: 2.2.0
Reporter: Tathagata Das
Assignee: Tathagata Das
Timeout and state data are two independent entities and should be settable
independently. Therefore,
- In the same call of the user-defined function, one should be able to set the
timeout before initializing the state.
- Removing the state should not reset timeouts.
However, a limitation of the current implementation is that state cannot be
null while timeout is set by the end of the function call is over. We should
check this lazily.
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