[HDFS-6951] Correctly persist raw namespace xattrs to edit log and fsimage

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 2.6.0
• Component/s: encryption
• Assignee: Charles Lamb
• Reporter: Stephen Chu
• Created: 27/Aug/14 01:45
• Updated: 12/May/16 18:12
• Resolved: 09/Sep/14 00:05

Description

Currently, when users save namespace and restart the NameNode, pre-existing encryption zones will be wiped out.

I could reproduce this on a pseudo-distributed cluster:

• Create an encryption zone
• List encryption zones and verify the newly created zone is present
• Save the namespace
• Kill and restart the NameNode
• List the encryption zones and you'll find the encryption zone is missing

I've attached a test case for TestEncryptionZones that reproduces this as well. Removing the saveNamespace call will get the test to pass.