[HBASE-27068] NPE occurs when the active master has not yet been elected

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.5.0, 3.0.0-alpha-3
• Hadoop Flags: Reviewed
• Assignee: Tao Li
• Reporter: Tao Li
• Created: 29/May/22 02:09
• Updated: 01/Jun/22 17:52
• Resolved: 31/May/22 18:51

Description

When the active master has not yet been elected. We access the master web UI, a NPE will be thrown out. Assertion is now added, but assertion in production is disabled by default. We can use `Preconditions` instead.

 

Before the change:

 

After the change:

Issue Links

• links to: GitHub Pull Request #4474