[HBASE-23737] [Flakey Tests] TestFavoredNodeTableImport fails 30% of the time

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.3.0, 2.1.9, 2.2.4
• Assignee: Michael Stack
• Reporter: Michael Stack
• Created: 25/Jan/20 01:38
• Updated: 27/Jan/20 23:15
• Resolved: 26/Jan/20 18:47

Description

Spent time on TestFavoredNodeTableImport. It fails w/ an NPE when we go to get favorednodes for one of the regions. It is sporadic. Fails for me locally too about 30% of the time.

I tried to study where we are going wrong. The balancer is disabled when we start the cluster up again on FN balancer... but this don't seem to be the problem.

Looks like laggard Regions taking their time to open means they don't show in the global list of favored nodes when the checking runs. Adding a wait till no RIT seems to stabilize the test.