Wei-Chiu Chuang created HADOOP-17875:
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             Summary: [KMS] FileNotFoundException due to inability to access 
zookeeper znode
                 Key: HADOOP-17875
                 URL: https://issues.apache.org/jira/browse/HADOOP-17875
             Project: Hadoop Common
          Issue Type: Bug
          Components: kms
            Reporter: Wei-Chiu Chuang


A mysterious FileNotFoundException was thrown by KMS client. The KMS server did 
not log anything related to it. After extensive investigation it was realized 
it could be caused by either of the two Zookeeper errors:

(1) unable to access the znode /zkdtsm due to Zookeeper ACL or other problems.
(2) if there's a runtime dependency mismatch. In in case, our RangerKMS (where 
the HadoopKMS runtime is embedded), threw a NoSuchMethodError during curator 
initialization (the RangerKMS used an incompatible curator-recipes version at 
runtime). Curator was not initialized successfully and therefore unable to 
access the znode.

In any case, it would be great to surface up the zookeeper issue to make 
troubleshooting easier.



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