[HDFS-14945] Revise PacketResponder's log.

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.1.3
• Fix Version/s: 3.3.0, 3.1.4, 3.2.2
• Component/s: datanode
• Assignee: Xudong Cao
• Reporter: Xudong Cao
• Created: 31/Oct/19 07:14
• Updated: 04/Nov/19 17:56
• Resolved: 04/Nov/19 17:41

Description

For a datanode in a pipeline, when its PacketResponder thread encounters an exception, it prints logs like below:

2019-10-24 09:22:58,212 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: IOException in BlockReceiver.run():

 

But this log is incorrect and misleading, the right print shoud be:

2019-10-24 09:22:58,212 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: IOException in PacketResponder.run():