[HBASE-22424] Interactions in RSGroup test classes will cause TestRSGroupsAdmin2.testMoveServersAndTables and TestRSGroupsBalance.testGroupBalance flaky

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.3.0
• Component/s: rsgroup
• Assignee: Xiaolin Ha
• Reporter: Xiaolin Ha
• Created: 15/May/19 08:47
• Updated: 17/May/19 19:59
• Resolved: 17/May/19 01:18

Description

When running rsgroup test class folder to run all the UTs together, TestRSGroupsAdmin2.testMoveServersAndTables and TestRSGroupsBalance.testGroupBalance will flaky.
Because TestRSGroupsAdmin1, TestRSGroupsAdmin2 and TestRSGroupsBalance are all extends TestRSGroupsBase, which has a static variable INIT, controlling the initialize of 'master 'group and the number of rs in 'default' rsgroup.

Output errors of TestRSGroupsBalance.testGroupBalance is shown in HBASE-22420, and TestRSGroupsAdmin2.testMoveServersAndTables will encounter NPE in ```rsGroupAdmin.getRSGroupInfo("master").containsServer(server.getAddress())``` because `master` group has not been added.

Issue Links

• links to: Review Board (master)