[jira] [Commented] (FLINK-17714) Support custom RestartBackoffTimeStrategy

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

    [ https://issues.apache.org/jira/browse/FLINK-17714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17169695#comment-17169695 ] 

Zhu Zhu commented on FLINK-17714:
---------------------------------

One way in my mind is allow users to configure the factory class name in flink conf and load it with user classloader.

The plugin mechanism might be a bit too complex for users to operator for a lightweight custom `RestartBackoffTimeStrategy`.
IIRC, the plugin mechanism requires the plugin jar to be put in {{/plugin}} folder. (Correct me if I'm wrong here.)

Besides that, a custom `RestartBackoffTimeStrategy` may rely on users' job code (e.g. to recognize a specific error). However, job users may not be able to add job specific plugins to flink client folder, in the case that the flink client is shared for multiple users and controlled by a separate infra team.

> Support custom RestartBackoffTimeStrategy
> -----------------------------------------
>
>                 Key: FLINK-17714
>                 URL: https://issues.apache.org/jira/browse/FLINK-17714
>             Project: Flink
>          Issue Type: Wish
>          Components: Runtime / Coordination
>            Reporter: Zhu Zhu
>            Priority: Major
>
> There are cases that users need to customize RestartBackoffTimeStrategy to better control job recovery. 
> One example is that users want a job to restart only on certain errors and fail on others. See this ML [disscusion|https://lists.apache.org/thread.html/rde685552a83d0d146cf83560df1bc6f33d3dd569f69ae7bbcc4ae508%40%3Cuser.flink.apache.org%3E].



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