[jira] [Created] (FLINK-5260) Add docs about how to react to cancellation

[Shang Yuanchun (Jira)]

Ufuk Celebi created FLINK-5260:
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             Summary: Add docs about how to react to cancellation
                 Key: FLINK-5260
                 URL: https://issues.apache.org/jira/browse/FLINK-5260
             Project: Flink
          Issue Type: Improvement
          Components: Documentation
            Reporter: Ufuk Celebi


Task cancellation with operators that work against external services can be a source of confusion for users. Since users need to cooperate for this, I would like to see some docs added about how the user can do this (which callbacks are available, how to react to interrupts, etc.)



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