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https://issues.apache.org/jira/browse/FLINK-26315?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dawid Wysakowicz updated FLINK-26315:
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Component/s: (was: Runtime / Task)
> Stream job which have multily region would not recover when connection with
> zookeeper/hbase lost.
> -------------------------------------------------------------------------------------------------
>
> Key: FLINK-26315
> URL: https://issues.apache.org/jira/browse/FLINK-26315
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Affects Versions: 1.12.0
> Reporter: Janick Wu
> Priority: Critical
>
> Our platfrom use failure-rate (failure-rate-interval:
> 5min,max-failures-per-interval: 6) as default restart-strategy. And
> failover-strategy is region level.
> Let's asume a job with concurrency of 10, all the edges in stream graph is
> FORWARD, then the region count is equal to job parallelism. If more than 5
> Task failed caused by connection lost between Taskmanager and external System
> such as zookeeper、hbase, failure rate will exceeded immediately. So our job
> will never recover from such situition(very common when use zookeeper for ha).
> h2. possible solution：
> Imporve failure-rate strategy: record last task failure cause and timestamp,.
> If the task failure cause occur multiple times in a short period of time, it
> will ingore the rest.
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