[HDFS-3548] NamenodeFsck.copyBlock fails to create a Block Reader

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.23.1, 2.0.0-alpha
• Fix Version/s: 2.0.2-alpha
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Colin McCabe
• Reporter: Todd Lipcon
• Created: 20/Jun/12 17:59
• Updated: 11/Oct/12 17:46
• Resolved: 08/Jul/12 19:47

Description

NamenodeFsck.copyBlock creates a Socket using new Socket(), and thus that socket doesn't have an associated Channel. Then, it fails to create a BlockReader since RemoteBlockReader2 needs a socket channel.
(thanks to Hiroshi Yokoi for reporting)