[HDFS-9181] Better handling of exceptions thrown during upgrade shutdown

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Labels: supportability
• Hadoop Flags: Reviewed
• Assignee: Wei-Chiu Chuang
• Reporter: Wei-Chiu Chuang
• Created: 30/Sep/15 21:08
• Updated: 14/Oct/19 15:37
• Resolved: 09/Oct/15 16:35

Description

Previously in HDFS-7533, a bug was fixed by suppressing exceptions during upgrade shutdown. It may be appropriate as a temporary fix, but it would be better if the exception is handled in some other ways.

One way to handle it is by emitting a warning message. There could exist other ways to handle it. This jira is created to discuss how to handle this case better.

Thanks to templedf for bringing this up.

Issue Links

• is related to: HDFS-7533 Datanode sometimes does not shutdown on receiving upgrade shutdown command