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

    https://github.com/apache/storm/pull/2005#discussion_r106342906
  
    --- Diff: 
storm-core/src/jvm/org/apache/storm/blobstore/LocalFsBlobStore.java ---
    @@ -231,6 +231,18 @@ public void deleteBlob(String key, Subject who) throws 
AuthorizationException, K
         }
     
         @Override
    +    public void clearRemovedBlob(String key) throws AuthorizationException 
{
    +        validateKey(key);
    +        // not pulling recent change and checking ACL
    --- End diff --
    
    @arunmahadevan 
    Yes I was thinking about that way but over-thought about false-positive 
(when ZK is down, throwing Exception, etc). KeyNotFoundException clearly states 
that ZK is accessible and key is not exist so no false-positive. Thanks I'll 
address this.


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