Jing Zhao created HDFS-5476:
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Summary: Snapshot: clean the blocks/files/directories under a
renamed file/directory while deletion
Key: HDFS-5476
URL: https://issues.apache.org/jira/browse/HDFS-5476
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.2.0
Reporter: Jing Zhao
Assignee: Jing Zhao
Currently DstReference#destroyAndCollectBlocks may fail to clean the subtree
under the DstReference node for file/directory/snapshot deletion.
Use case 1:
# rename under-construction file with 0-sized blocks after snapshot.
# delete the renamed directory.
We need to make sure we delete the 0-sized block.
Use case 2:
# create snapshot s0 for /
# create a new file under /foo/bar/
# rename foo --> foo2
# create snapshot s1
# delete bar and foo2
# delete snapshot s1
We need to make sure we delete the file under /foo/bar since it is not included
in snapshot s0.
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