[HDFS-4801] lsSnapshottableDir throws IllegalArgumentException when root is made snapshottable

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: Snapshot (HDFS-2802)
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Jing Zhao
• Reporter: Ramya Sunil
• Created: 06/May/13 17:32
• Updated: 07/May/13 13:13
• Resolved: 06/May/13 22:49

Description

$ hadoop dfsadmin -allowSnapshot /
Allowing snaphot on / succeeded

$ hadoop lsSnapshottableDir
Exception in thread "main" java.lang.IllegalArgumentException: Can not create a Path from an empty string
at org.apache.hadoop.fs.Path.checkPathArg(Path.java:82)
at org.apache.hadoop.fs.Path.<init>(Path.java:90)
at org.apache.hadoop.fs.Path.<init>(Path.java:45)
at org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus.getFullPath(SnapshottableDirectoryStatus.java:125)
at org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus.print(SnapshottableDirectoryStatus.java:166)
at org.apache.hadoop.hdfs.tools.snapshot.LsSnapshottableDir.main(LsSnapshottableDir.java:55)

Whereas,
$ hadoop dfsadmin -disallowSnapshot /
Disallowing snaphot on / succeeded

$ hadoop lsSnapshottableDir

$