[jira] [Commented] (BEAM-1517) Garbage collect user state in Flink Runner

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-1517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15890550#comment-15890550 ] 

ASF GitHub Bot commented on BEAM-1517:
--------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/beam/pull/2127


> Garbage collect user state in Flink Runner
> ------------------------------------------
>
>                 Key: BEAM-1517
>                 URL: https://issues.apache.org/jira/browse/BEAM-1517
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-flink
>    Affects Versions: 0.6.0
>            Reporter: Aljoscha Krettek
>            Assignee: Aljoscha Krettek
>            Priority: Blocker
>             Fix For: 0.6.0
>
>
> User facing state/timers in Beam are bound to the key/window of the data. Right now, the Flink Runner does not clean up user state when the watermark passes the GC horizon for the state associated with a given window.
> Neither {{StateInternals}} nor the Flink state API support discarding state for a whole namespace (which is the window in this case) so we might have to manually set a GC timer for each window/key combination, as is done in the {{ReduceFnRunner}}. For this we have to know all states a user can possibly use, which we can get from the {{DoFn}} signature.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)