[HDFS-8290] WebHDFS calls before namesystem initialization can cause NullPointerException.

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: webhdfs
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Assignee: Chris Nauroth
• Reporter: Chris Nauroth
• Created: 29/Apr/15 21:53
• Updated: 30/Aug/16 01:35
• Resolved: 04/May/15 18:39

Description

The NameNode has a brief window of time when the HTTP server has been initialized, but the namesystem has not been initialized. During this window, a WebHDFS call can cause a NullPointerException. We can catch this condition and return a more meaningful error.