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https://issues.apache.org/jira/browse/FLINK-13588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16907109#comment-16907109
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John Lonergan commented on FLINK-13588:
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Hi yes that's how we"fixed" it because it limits the change to a one liner.
> StreamTask.handleAsyncException throws away the exception cause
> ---------------------------------------------------------------
>
> Key: FLINK-13588
> URL: https://issues.apache.org/jira/browse/FLINK-13588
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Task
> Affects Versions: 1.8.1
> Reporter: John Lonergan
> Priority: Major
>
> Code below throws the reason 'message' away making it hard to diagnose why a
> split has failed for instance.
>
> {code:java}
> https://github.com/apache/flink/blob/master/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/StreamTask.java#L909
> @Override
> public void handleAsyncException(String message, Throwable exception) {
> if (isRunning) {
> // only fail if the task is still running
> getEnvironment().failExternally(exception);
> }
> }{code}
>
> Need to pass the message through so that we see it in logs please.
>
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