Description
TestResourceTrackerService is failing in trunk sometimes with the following error:
testDecommissionWithIncludeHosts(org.apache.hadoop.yarn.server.resourcemanager.TestResourceTrackerService) Time elapsed: 0.876 sec <<< ERROR!
java.lang.NullPointerException
at org.apache.hadoop.yarn.server.resourcemanager.ClusterMetrics.getNumDecommisionedNMs(ClusterMetrics.java:78)
at org.apache.hadoop.yarn.server.resourcemanager.TestResourceTrackerService.testDecommissionWithIncludeHosts(TestResourceTrackerService.java:70)