[HDFS-6798] Add test case for incorrect data node condition during balancing

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.1
• Fix Version/s: 2.6.0
• Component/s: balancer & mover
• Target Version/s: 2.6.0
• Hadoop Flags: Reviewed
• Assignee: Benoy Antony
• Reporter: Benoy Antony
• Created: 31/Jul/14 21:43
• Updated: 01/Dec/14 03:08
• Resolved: 01/Aug/14 07:13

Description

The Balancer makes a check to see if a block's location is a known data node. But the variable it uses to check is wrong. This issue was fixed in HDFS-6364.
There was no way to easily unit test it at that time. Since HDFS-6441 enables one to simulate this case, it was decided to add the unit test once HDFS-6441 is resolved.

Issue Links

• depends upon: HDFS-6364 Incorrect check for unknown datanode in Balancer
• depends upon: HDFS-6441 Add ability to exclude/include specific datanodes while balancing