Stephan Ewen created FLINK-2646:
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Summary: Rich functions should provide a method
"closeAfterFailure()"
Key: FLINK-2646
URL: https://issues.apache.org/jira/browse/FLINK-2646
Project: Flink
Issue Type: Improvement
Components: Core
Affects Versions: 0.10
Reporter: Stephan Ewen
Fix For: 0.10
Right now, the {{close()}} method of rich functions is invoked in case of
proper completion, and in case of canceling in case of error (to allow for
cleanup).
In certain cases, the user function needs to know why it is closed, whether the
task completed in a regular fashion, or was canceled/failed.
I suggest to add a method {{closeAfterFailure()}} to the {{RuchFunction}}. By
default, this method calls {{close()}}. The runtime is the changed to call
{{close()}} as part of the regular execution and {{closeAfterFailure()}} in
case of an irregular exit.
Because by default all cases call {{close()}} the change would not be API
breaking.
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