[jira] [Commented] (FLINK-14164) Add a metric to show failover count regarding fine grained recovery

["Jiayi Liao (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-14164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16935589#comment-16935589 ] 

Jiayi Liao commented on FLINK-14164:
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+1 for this issue.
[~zhuzh] Currently I'm collecting and adding metrics from the whole flink job, including the more fine grained metrics. I can work on this.
By the way, just to double check the definition,

numberOfFailures and numberOfRestarts both mean task count, right?

> Add a metric to show failover count regarding fine grained recovery
> -------------------------------------------------------------------
>
>                 Key: FLINK-14164
>                 URL: https://issues.apache.org/jira/browse/FLINK-14164
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Coordination, Runtime / Metrics
>    Affects Versions: 1.9.0, 1.10.0
>            Reporter: Zhu Zhu
>            Priority: Major
>             Fix For: 1.10.0
>
>
> Previously Flink uses restart all strategy to recover jobs from failures. And the metric "fullRestart" is used to show the count of failovers.
> However, with fine grained recovery introduced in 1.9.0, the "fullRestart" metric only reveals how many times the entire graph has been restarted, not including the number of fine grained failure recoveries.
> As many users want to build their job alerting based on failovers, I'd propose to add such a new metric {{numberOfFailures}}/{{numberOfRestarts}} which also respects fine grained recoveries.



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