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From "Thomas Weise (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXMALHAR-2419) KafkaSinglePortExactlyOnceOutputOperator fails on recovery
Date Wed, 22 Feb 2017 20:39:44 GMT

    [ https://issues.apache.org/jira/browse/APEXMALHAR-2419?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15879182#comment-15879182
] 

Thomas Weise commented on APEXMALHAR-2419:
------------------------------------------

Completed windows (endWindow) are supposed to be flushed to WAL, irrespective of committed.


> KafkaSinglePortExactlyOnceOutputOperator fails on recovery
> ----------------------------------------------------------
>
>                 Key: APEXMALHAR-2419
>                 URL: https://issues.apache.org/jira/browse/APEXMALHAR-2419
>             Project: Apache Apex Malhar
>          Issue Type: Bug
>            Reporter: Munagala V. Ramanath
>            Assignee: Sandesh
>
> The KafkaSinglePortExactlyOnceOutputOperator fails on recovery with the message: "Violates
Exactly once. Not all the tuples received after operator reset."
> This is because of this check in endWindow():
> {code}
>    if (!partialWindowTuples.isEmpty() && windowId > windowDataManager.getLargestCompletedWindow())
{
>       throw new RuntimeException("Violates Exactly once. Not all the tuples received
after operator reset.");
>     }
> {code}



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