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https://issues.apache.org/jira/browse/HBASE-20169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16408170#comment-16408170
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stack commented on HBASE-20169:
-------------------------------
So, TestAMMetrics has dropped from top list of flakies but still fails
occasionally in the bottom list of GCE runs AND it is failing with the NPE. My
patch is in place for this run
http://104.198.223.121:8080/job/HBASE-Flaky-Tests-branch2.0/1375/testReport/junit/org.apache.hadoop.hbase.master/TestAssignmentManagerMetrics/org_apache_hadoop_hbase_master_TestAssignmentManagerMetrics/
It prints out my debug:
2018-03-21 01:02:14,277 INFO [Time-limited test]
master.TestAssignmentManagerMetrics(101): AFTER
org.apache.hadoop.hbase.HBaseTestingUtility@22710ac7 <= IS THIS NULL?
Then it does this about the next line...
java.lang.NullPointerException
at
org.apache.hadoop.hbase.master.TestAssignmentManagerMetrics.after(TestAssignmentManagerMetrics.java:102)
102 TEST_UTIL.shutdownMiniCluster();
So, more to do here.
> NPE when calling HBTU.shutdownMiniCluster (TestAssignmentManagerMetrics is
> flakey)
> ----------------------------------------------------------------------------------
>
> Key: HBASE-20169
> URL: https://issues.apache.org/jira/browse/HBASE-20169
> Project: HBase
> Issue Type: Bug
> Components: test
> Reporter: Duo Zhang
> Assignee: stack
> Priority: Critical
> Fix For: 2.0.0
>
> Attachments: HBASE-20169.branch-2.001.patch,
> HBASE-20169.branch-2.002.patch, HBASE-20169.branch-2.003.patch,
> HBASE-20169.branch-2.004.patch, HBASE-20169.branch-2.005.patch
>
>
> 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/
> {noformat}
> 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)
> {noformat}
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