[HDFS-9331] Modify TestNameNodeMXBean#testNameNodeMXBeanInfo() to account for filesystem entirely allocated for DFS use

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.7.1
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: test
• Assignee: Tony Wu
• Reporter: Tony Wu
• Created: 28/Oct/15 21:59
• Updated: 12/May/16 18:11
• Resolved: 04/Nov/15 18:28

Description

TestNameNodeMXBean#testNameNodeMXBeanInfo expects a none-zero nonDFS size. The nonDFS size is defined as:

The space that is not used by HDFS. For instance, once you format a new disk to ext4, certain space is used for "lost-and-found" directory and ext4 metadata.

It will be possible to fully allocate all spaces in a filesystem for DFS use. In which case the nonDFS size will be zero. We can relax the check in the test to account for this case.