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https://issues.apache.org/jira/browse/FLINK-14156?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex updated FLINK-14156:
-------------------------
Description:
With FLINK-12481, the timer triggers are executed by the mailbox thread and
passed to the mailbox with the maximum priority.
In case of operators that use {{mailbox.yield()}} (introduced in FLINK-13248),
current approach may execute timer triggers that belong to an upstream
operator. Such timer trigger, may potentially call
{{processElement|Watermark()}} which eventually would come back to the current
operator. This situation may be similar to FLINK-13063.
To avoid this, the proposal is to set mailbox letters priorities of timer
triggers with the priority of the operator that the trigger belongs to.
was:
With FLINK-12841, the timer triggers are executed by the mailbox thread and
passed to the mailbox with the maximum priority.
In case of operators that use {{mailbox.yield()}} (introduced in FLINK-13248),
current approach may execute timer triggers that belong to an upstream
operator. Such timer trigger, may potentially call
{{processElement|Watermark()}} which eventually would come back to the current
operator. This situation may be similar to FLINK-13063.
To avoid this, the proposal is to set mailbox letters priorities of timer
triggers with the priority of the operator that the trigger belongs to.
> Execute/run processing timer triggers taking into account operator level
> mailbox loops
> --------------------------------------------------------------------------------------
>
> Key: FLINK-14156
> URL: https://issues.apache.org/jira/browse/FLINK-14156
> Project: Flink
> Issue Type: Sub-task
> Reporter: Alex
> Priority: Major
>
> With FLINK-12481, the timer triggers are executed by the mailbox thread and
> passed to the mailbox with the maximum priority.
> In case of operators that use {{mailbox.yield()}} (introduced in
> FLINK-13248), current approach may execute timer triggers that belong to an
> upstream operator. Such timer trigger, may potentially call
> {{processElement|Watermark()}} which eventually would come back to the
> current operator. This situation may be similar to FLINK-13063.
> To avoid this, the proposal is to set mailbox letters priorities of timer
> triggers with the priority of the operator that the trigger belongs to.
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