[HDFS-4916] DataTransfer may mask the IOException during block transfering

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Implemented
• Affects Version/s: 2.0.4-alpha, 2.0.5-alpha
• Component/s: datanode
• Labels: BB2015-05-TBR
• Assignee: Lisheng Sun
• Reporter: Zesheng Wu
• Created: 19/Jun/13 01:28
• Updated: 10/Sep/19 16:01
• Resolved: 10/Sep/19 16:01

Description

When a new datanode is added to the pipeline, the client will trigger the block transfer process. In the current implementation, the src datanode calls the run() method of the DataTransfer to transfer the block, this method will mask the IOExceptions during the transfering, and will make the client not realize the failure during the transferring, as a result the client will mistake the failing transferring as successful one.