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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-647) Fault-tolerant sideInputs via Broadcast variables
Date Tue, 10 Jan 2017 17:27:58 GMT

    [ https://issues.apache.org/jira/browse/BEAM-647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15815584#comment-15815584
] 

ASF GitHub Bot commented on BEAM-647:
-------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/beam/pull/1624


> Fault-tolerant sideInputs via Broadcast variables
> -------------------------------------------------
>
>                 Key: BEAM-647
>                 URL: https://issues.apache.org/jira/browse/BEAM-647
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-spark
>            Reporter: Amit Sela
>            Assignee: Kobi Salant
>
> Following https://github.com/apache/incubator-beam/pull/909 which enables checkpointing
to recover from failures, sideInputs (being implemented by broadcast variables) should be
handled in a specific manner as described here: http://spark.apache.org/docs/1.6.2/streaming-programming-guide.html#accumulators-and-broadcast-variables.
> This is a bit more complicated than Aggregators (via Accumulators) as they are implemented
using a single "aggregating"  Accumulator, while a pipeline may contain multiple sideInputs.



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