kanaka kumar avvaru created HDFS-8029:
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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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