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https://issues.apache.org/jira/browse/FLINK-20762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17254936#comment-17254936
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Liu commented on FLINK-20762:
-----------------------------

[~yunta] Thank you for your information. I have read the FLINK-15012. It is the 
same problem with this ticket. I will keep watch FLINK-15012.

> Remove unused checkpointStorage path after job finished
> -------------------------------------------------------
>
>                 Key: FLINK-20762
>                 URL: https://issues.apache.org/jira/browse/FLINK-20762
>             Project: Flink
>          Issue Type: Improvement
>            Reporter: Liu
>            Priority: Minor
>
>     Current checkpoint structure is as following:
> {code:java}
> /user-defined-checkpoint-dir 
>     | 
>     + --shared/ 
>     + --taskowned/ 
>     + --chk-00001/ 
>     + --chk-00002/...
> {code}
>     After cancelling job, the checkpointStorage will not be removed.  For 
> some cases, the dictionary can not be removed. For example, external 
> checkpoint is retained or taskowned is used. 
>     If all the sub-dictionaries are empty, maybe the checkpointStorage can be 
> removed. Otherwise, there will be lots of unused dictionaries with time going 
> on. I wonder whether this is a problem. If so, I would like to fix it. Thank 
> you.



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