[HDFS-7167] NPE while running Mover if the given path is for a file

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.6.0
• Component/s: balancer & mover
• Target Version/s: 2.6.0
• Hadoop Flags: Reviewed
• Assignee: Jing Zhao
• Reporter: Prabushankar Chinnasamy
• Created: 29/Sep/14 22:20
• Updated: 02/Mar/15 16:55
• Resolved: 30/Sep/14 18:26

Description

Thanks to prabushankar.c for reporting this issue!

Currently in the new migration tool Mover, we allow users to specify a list of paths for migration. Then in Mover#processNamespace we directly call getFileInfo to retrieve the status of the given path. If the given path is a file, the returned HdfsFileStatus does not contain block location information, this can trigger an NPE.