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Date: Wed, 5 Apr 2017 08:00:53 +0000 (UTC)
From: "Stas Levin (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (BEAM-1777) If PipelineEnforcement throws an
 exception after Pipeline.run() fails, it overwrites the original failure
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archived-at: Wed, 05 Apr 2017 08:00:58 -0000


    [ https://issues.apache.org/jira/browse/BEAM-1777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15956479#comment-15956479 ] 

Stas Levin commented on BEAM-1777:
----------------------------------

[~tgroh] Since I was unable to come up with a proper test for this, would you mind confirming it resolves the use-case you encountered?

> If PipelineEnforcement throws an exception after Pipeline.run() fails, it overwrites the original failure
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: BEAM-1777
>                 URL: https://issues.apache.org/jira/browse/BEAM-1777
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-java-core
>            Reporter: Thomas Groh
>            Assignee: Stas Levin
>
> The exception is thrown out of the finally block after the original exception was already thrown, and is not properly suppressed.
> If the Pipeline throws an exception in construction (including validation failures), this can cause {{AbandonedNodeEnforcement}} to attempt to traverse a {{Pipeline}} which is invalid, which throws another exception. That exception is improperly propagated instead of the original failure, which complicates debugging.
> An example is using an unkeyed input PCollection to a Stateful ParDo. The validation will fail, but the error message will suggest that a node has incompletely specified outputs (which is a consequence rather than a cause of having an invalid transform).


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