[HDFS-16598] Fix DataNode FsDatasetImpl lock issue without GS checks.

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: datanode
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• External issue ID: HDFS-16534
• Assignee: ZanderXu Assign to me
• Reporter: ZanderXu
• Created: 28/May/22 01:23
• Updated: 12/Feb/24 06:42
• Resolved: 14/Jun/22 13:50

Description

org.apache.hadoop.hdfs.testPipelineRecoveryOnRestartFailure failed with the stack like:

java.io.IOException: All datanodes [DatanodeInfoWithStorage[127.0.0.1:57448,DS-1b5f7e33-a2bf-4edc-9122-a74c995a99f5,DISK]] are bad. Aborting...
	at org.apache.hadoop.hdfs.DataStreamer.handleBadDatanode(DataStreamer.java:1667)
	at org.apache.hadoop.hdfs.DataStreamer.setupPipelineInternal(DataStreamer.java:1601)
	at org.apache.hadoop.hdfs.DataStreamer.setupPipelineForAppendOrRecovery(DataStreamer.java:1587)
	at org.apache.hadoop.hdfs.DataStreamer.processDatanodeOrExternalError(DataStreamer.java:1371)
	at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:674)

After tracing the root cause, this bug was introduced by HDFS-16534. Because the block GS of client may be smaller than DN when pipeline recovery failed.

Issue Links

• links to: GitHub Pull Request #4366