Jing Zhao created HDFS-4557:
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Summary: Fix FSDirectory#delete when INode#cleanSubtree returns 0
Key: HDFS-4557
URL: https://issues.apache.org/jira/browse/HDFS-4557
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Jing Zhao
Assignee: Jing Zhao
Currently INode#cleanSubtree is used to delete files/directories and collect
corresponding blocks for future deletion. Its return value can be 0 even if
file/dir has been deleted because we save snapshot copies. This breaks the
original logic in FSDirectory#delete since FSDirectory#delete expects a
positive value from a successful deletion. This bug may cause some bad scenario
such as a lease remains in NN while the file has been moved to snapshot.
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