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https://issues.apache.org/jira/browse/FLINK-6719?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16449754#comment-16449754
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ASF GitHub Bot commented on FLINK-6719:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/5887#discussion_r183710783
--- Diff: docs/dev/stream/operators/process_function.md ---
@@ -271,9 +271,9 @@ override def onTimer(timestamp: Long, ctx:
OnTimerContext, out: Collector[OUT]):
</div>
</div>
-## Optimizations
+## Timers
-### Timer Coalescing
+### Optimizations - Timer Coalescing
Every timer registered at the `TimerService` via
`registerEventTimeTimer()` or
--- End diff --
Also it would be great if you could find a good spot to add a note that
calls to `processElement()` and `onTimer()` are always synchronized, i.e.,
users do not have to worry about concurrent modification of state.
> Add details about fault-tolerance of timers to ProcessFunction docs
> -------------------------------------------------------------------
>
> Key: FLINK-6719
> URL: https://issues.apache.org/jira/browse/FLINK-6719
> Project: Flink
> Issue Type: Improvement
> Components: DataStream API, Documentation
> Affects Versions: 1.5.0
> Reporter: Tzu-Li (Gordon) Tai
> Assignee: Bowen Li
> Priority: Major
> Fix For: 1.6.0, 1.5.1
>
>
> The fault-tolerance of timers is a frequently asked questions on the mailing
> lists. We should add details about the topic in the {{ProcessFunction}} docs.
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