[HDFS-14480] Shut down DataNode gracefully when responding to stop-dfs.sh/stop-dfs.cmd

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: datanode
• Assignee: Feilong He
• Reporter: Feilong He
• Created: 08/May/19 06:44
• Updated: 16/Nov/21 06:50
• Resolved: 16/Nov/21 06:50

Description

Currently, DataNode has #shutdown method to tackle something before shutdown. But its shutdown hook does't call this method. In HDFS-14401 for HDFS persistent memory cache optimization, we added clean cache logic in DN's #shutdown method. And we expect DN will clean up cache during shut down by stop-dfs.sh/stop-dfs.cmd, which depends on this Jira's patch.