[HDFS-15733] Add seqno in log when BlockReceiver receive packet

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: datanode
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Haibin Huang
• Reporter: Haibin Huang
• Created: 17/Dec/20 13:26
• Updated: 11/Feb/24 07:03
• Resolved: 20/Dec/20 09:52

Description

There is a debug log show when BlockReceiver receiving a new packet, however now we can't tell which packet this debug log belongs to, i think it would be better to add a sequence number in the log.

now the debug log like this, missing the seqno of packet 

2020-12-11,16:26:30,518 DEBUG org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving one packet for block BP-XXX:blk_XXX: PacketHeader with packetLen=2559 header data: offsetInBlock: 1