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https://issues.apache.org/jira/browse/FLINK-14164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Till Rohrmann reassigned FLINK-14164:
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Assignee: Zhu Zhu
> 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: Sub-task
> Components: Runtime / Coordination, Runtime / Metrics
> Affects Versions: 1.10.0
> Reporter: Zhu Zhu
> Assignee: 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 {{numberOfRestarts}} which also respects
> fine grained recoveries. The metric should be a meter(MeterView) so that
> users can leverage the rate to detect newly happened failures rather than de
> deviation by themselves.
> The MeterView should be added in SchedulerBase to serve both legacy scheduler
> and ng scheduler.
> The underlying counter of the MeterView is determined by the scheduler
> implementations：
> 1. for legacy scheduler, it's the {{ExecutionGraph#numberOfRestartsCounter}}
> which was added in FLINK-14206
> 2. for ng scheduler, it's a new counter added in {{ExecutionFailureHandler}}
> that counts all the task and global failures notified to it.
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