[HDFS-15641] DataNode could meet deadlock if invoke refreshNameNode

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 3.2.0
• Fix Version/s: 3.2.2, 3.3.1, 3.4.0, 3.2.3
• Component/s: datanode
• Target Version/s: 3.3.1, 3.4.0, 3.2.3
• Hadoop Flags: Reviewed
• Assignee: Hongbing Wang
• Reporter: Hongbing Wang
• Created: 19/Oct/20 12:28
• Updated: 27/Jan/24 03:06
• Resolved: 26/Oct/20 14:51

Description

DataNode could meet deadlock when invoke `hdfs dfsadmin -refreshNamenodes hostname:50020` to register a new namespace in federation env.

The jstack is shown in jstack.log
The specific process is shown in Figure deadlock.png