[
https://issues.apache.org/jira/browse/FLINK-32362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17733451#comment-17733451
]
Cai Liuyang commented on FLINK-32362:
-------------------------------------
[~fanrui] I compare the two ways, in common case if one task is unready, other
subtask may be also unready with high probability, the inner-catch will print
many useless log(with the same reason), so i chose the outer-catch
> SourceAlignment announceCombinedWatermark period task maybe lost
> ----------------------------------------------------------------
>
> Key: FLINK-32362
> URL: https://issues.apache.org/jira/browse/FLINK-32362
> Project: Flink
> Issue Type: Bug
> Affects Versions: 1.16.0
> Reporter: Cai Liuyang
> Assignee: Cai Liuyang
> Priority: Major
> Labels: pull-request-available
>
> When we use sourcealignment，we also found there is another problem that
> announceCombinedWatermark may throw a exception (like "subtask 25 is not
> ready yet to receive events" , this subtask maybe under failover), which will
> lead the period task not running any more (ThreadPoolExecutor will not
> schedule the period task if it throw a exception)
> I think we should increase the robustness of announceCombinedWatermark
> function to avoid it throw any exception (if send fail, just wait next send)
> (code see
> [https://github.com/apache/flink/blob/master/flink-runtime/src/main/java/org/apache/flink/runtime/source/coordinator/SourceCoordinator.java#L199]
> )
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
