[HBASE-20169] NPE when calling HBTU.shutdownMiniCluster (TestAssignmentManagerMetrics is flakey)

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.0.1
• Component/s: test
• Hadoop Flags: Reviewed
• Assignee: Chia-Ping Tsai
• Reporter: Duo Zhang
• Created: 10/Mar/18 01:00
• Updated: 01/Aug/18 06:23
• Resolved: 02/May/18 23:15

Description

This usually happens when some master or rs has already been down before we calling shutdownMiniCluster.

See

https://builds.apache.org/job/HBASE-Flaky-Tests/27223/testReport/junit/org.apache.hadoop.hbase.master/TestAssignmentManagerMetrics/org_apache_hadoop_hbase_master_TestAssignmentManagerMetrics/

and also

http://104.198.223.121:8080/job/HBASE-Flaky-Tests/34873/testReport/junit/org.apache.hadoop.hbase.master/TestRestartCluster/testRetainAssignmentOnRestart/

java.lang.NullPointerException
	at org.apache.hadoop.hbase.master.TestAssignmentManagerMetrics.after(TestAssignmentManagerMetrics.java:100)

java.lang.NullPointerException
	at org.apache.hadoop.hbase.master.TestRestartCluster.testRetainAssignmentOnRestart(TestRestartCluster.java:156)

Issue Links

• relates to: HBASE-19598 Fix TestAssignmentManagerMetrics flaky test
• links to: Review Board (branch-2)
• links to: Review Board (branch-2.0)
• links to: Review Board (master)