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From "Kenneth Knowles (JIRA)" <j...@apache.org>
Subject [jira] [Created] (BEAM-1641) Support synchronized processing time in Flink runner
Date Tue, 07 Mar 2017 19:42:37 GMT
Kenneth Knowles created BEAM-1641:
-------------------------------------

             Summary: Support synchronized processing time in Flink runner
                 Key: BEAM-1641
                 URL: https://issues.apache.org/jira/browse/BEAM-1641
             Project: Beam
          Issue Type: Bug
          Components: runner-flink
            Reporter: Kenneth Knowles
            Assignee: Aljoscha Krettek


The "continuation trigger" for a processing time trigger is a synchronized processing time
trigger. Today, this throws an exception in the FlinkRunner.

The supports the following:

 - GBK1
 - GBK2

When GBK1 fires due to processing time past the first element in the pane and that element
arrives at GBK2, it will wait until all the other upstream keys have also processed and emitted
corresponding data.

Sorry for the terseness of explanation - writing quickly so I don't forget.



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