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https://issues.apache.org/jira/browse/FLINK-6522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16071319#comment-16071319
 ] 

ASF GitHub Bot commented on FLINK-6522:
---------------------------------------

Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4204#discussion_r125164998
  
    --- Diff: 
flink-runtime/src/main/java/org/apache/flink/runtime/zookeeper/filesystem/FileSystemStateStorageHelper.java
 ---
    @@ -77,4 +83,18 @@ public FileSystemStateStorageHelper(Path rootPath, 
String prefix) throws IOExcep
        private Path getNewFilePath() {
                return new Path(rootPath, FileUtils.getRandomFilename(prefix));
        }
    +
    +   @Override
    +   public void closeAndCleanupAllData() {
    +           try {
    +                   fs.delete(rootPath, true);
    --- End diff --
    
    We cannot simply delete the rootPath, because it's 
`HighAvailabilityOptions.HA_STORAGE_PATH`. Thus, we would also delete files 
from other components in this directory (e.g. the `BlobServer`). I think the 
`FileSystemStateStorageHelper` has to create a sub directory for the state to 
store. That directory, we can easily delete.


> Add ZooKeeper cleanup logic to ZooKeeperHaServices
> --------------------------------------------------
>
>                 Key: FLINK-6522
>                 URL: https://issues.apache.org/jira/browse/FLINK-6522
>             Project: Flink
>          Issue Type: Improvement
>          Components: Distributed Coordination
>    Affects Versions: 1.3.0, 1.4.0
>            Reporter: Till Rohrmann
>            Assignee: Fang Yong
>
> The {{ZooKeeperHaServices}} provide a {{CuratorFramework}} client to access 
> ZooKeeper data. Consequently, all data (also for different job) are stored 
> under the same root node. When 
> {{HighAvailabilityServices#closeAndCleanupAllData}} is called, then this data 
> should be cleaned up. This cleanup logic is currently missing.



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