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Posted to dev@flink.apache.org by "Stephan Ewen (JIRA)" <ji...@apache.org> on 2015/05/21 12:46:59 UTC

[jira] [Created] (FLINK-2067) Chained streaming operators should not throw chained exceptions

Stephan Ewen created FLINK-2067:
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             Summary: Chained streaming operators should not throw chained exceptions
                 Key: FLINK-2067
                 URL: https://issues.apache.org/jira/browse/FLINK-2067
             Project: Flink
          Issue Type: Bug
          Components: Streaming
            Reporter: Stephan Ewen


The exceptions that come from chained operators have an non-intuitive chaining structure, that makes the stack traces harder to understand.

For every chained task, there is a "Failed to forward record" exception, before the actual exception comes as a cause.

In the Batch API, we use a special "ExceptionInChainedStubException" that is recognized and un-nested to make chained operator exceptions surface as root exceptions. 

We should do the same for the streaming API.





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