Santhosh G Nayak created HADOOP-14361:
-----------------------------------------

             Summary: Azure: NativeAzureFileSystem.getDelegationToken() call 
fails sometimes when invoked concurrently
                 Key: HADOOP-14361
                 URL: https://issues.apache.org/jira/browse/HADOOP-14361
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs/azure
    Affects Versions: 2.9.0
            Reporter: Santhosh G Nayak
            Assignee: Santhosh G Nayak


Sometimes {{NativeAzureFileSystem.getDelegationToken()}} method fails with 
below exception when invoked concurrently,
{code}Caused by: 
org.apache.hadoop.security.authentication.client.AuthenticationException: 
Authentication failed, URL: 
http://delegationtokenmanger/?op=GETDELEGATIONTOKEN&renewer=rm%2Fhostname%40realm,
 status: 401, message: Authentication required
        at 
org.apache.hadoop.security.authentication.client.AuthenticatedURL.extractToken(AuthenticatedURL.java:278)
        at 
org.apache.hadoop.security.authentication.client.KerberosAuthenticator.authenticate(KerberosAuthenticator.java:195)
        at 
org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.authenticate(DelegationTokenAuthenticator.java:132)
        at 
org.apache.hadoop.security.authentication.client.AuthenticatedURL.openConnection(AuthenticatedURL.java:216)
        at 
org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.doDelegationTokenOperation(DelegationTokenAuthenticator.java:298)
        at 
org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.getDelegationToken(DelegationTokenAuthenticator.java:170)
        at 
org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticatedURL.getDelegationToken(DelegationTokenAuthenticatedURL.java:371)
        at 
org.apache.hadoop.fs.azure.NativeAzureFileSystem$2.run(NativeAzureFileSystem.java:2993)
        at 
org.apache.hadoop.fs.azure.NativeAzureFileSystem$2.run(NativeAzureFileSystem.java:2990)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at 
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1866)
        ... 29 more
{code}



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