[jira] [Updated] (FLINK-11695) Make sharedStateDir could create sub-directories to avoid MaxDirectoryItemsExceededException

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

     [ https://issues.apache.org/jira/browse/FLINK-11695?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yun Tang updated FLINK-11695:
-----------------------------
    Summary: Make sharedStateDir could create sub-directories to avoid MaxDirectoryItemsExceededException  (was: [checkpoint] Make sharedStateDir could create sub-directories to avoid MaxDirectoryItemsExceededException)

> Make sharedStateDir could create sub-directories to avoid MaxDirectoryItemsExceededException
> --------------------------------------------------------------------------------------------
>
>                 Key: FLINK-11695
>                 URL: https://issues.apache.org/jira/browse/FLINK-11695
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Checkpointing
>            Reporter: Yun Tang
>            Assignee: Yun Tang
>            Priority: Major
>
> We meet this annoying problem many times when the {{sharedStateDir}} in checkpoint path exceeded the directory items limit due to large checkpoint:
> {code:java}
> org.apache.hadoop.hdfs.protocol.FSLimitException$MaxDirectoryItemsExceededException: The directory item limit of xxx is exceeded: limit=1048576 items=1048576 
> {code}
> Currently, our solution is to let {{FsCheckpointStorage}} could create sub-dirs when calling {{resolveCheckpointStorageLocation}}. The default value for the number of sub-dirs is zero, just keep backward compatibility as current situation. The created sub-dirs have the name as integer value of [{{0, num-of-sub-dirs}})



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