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From "kanaka kumar avvaru (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8029) NPE during disk usage calculation on snapshot directory, after a sub folder is deleted
Date Tue, 31 Mar 2015 14:24:52 GMT
kanaka kumar avvaru created HDFS-8029:
-----------------------------------------

             Summary: NPE during disk usage calculation on snapshot directory, after a sub
folder is deleted
                 Key: HDFS-8029
                 URL: https://issues.apache.org/jira/browse/HDFS-8029
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: kanaka kumar avvaru
            Assignee: kanaka kumar avvaru


ContentSummary computation is causing NullPointerException on snapshot directory if some sub
directory is deleted.
  Following are the steps to reproduce the issue.
  
  1. Create a root directory "/test"
  2. Create sub dir named as  /test/sub1
  3. Create sub dir in sub1 as  /test/sub1/sub2
  4. Create a file at  /test/sub1/file1
  5. Create a file at /test/sub1/sub2/file1
  6. Enable shotshot on sub1 (hadoop dfsadmin -allowSnapshot test/sub1)
  7. Create snapshot1 on /test/sub1
  8. Delete directory /test/sub1/sub2 (recursively)
  9. Create  snapshot2 on /test/sub1
  10. Execute du command on /test (hadoop fs -du  /test/) 
  
  
  Gives NullPointerException in CLI. NameNode logs the exception as
  ... java.lang.NullPointerException	at org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext.getBlockStoragePolicySuite(ContentSummaryComputationContext.java:122)
...
  



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