Description
Seeing this on CM tests with frequent master thrashing
2014-10-31 12:01:59,196 ERROR [Timer for 'HBase' metrics system] impl.MetricsSourceAdapter: Error getting metrics from source IPC,sub=IPC java.lang.NullPointerException at org.apache.hadoop.hbase.ipc.FifoRpcScheduler.getGeneralQueueLength(FifoRpcScheduler.java:81) at org.apache.hadoop.hbase.ipc.MetricsHBaseServerWrapperImpl.getGeneralQueueLength(MetricsHBaseServerWrapperImpl.java:43) at org.apache.hadoop.hbase.ipc.MetricsHBaseServerSourceImpl.getMetrics(MetricsHBaseServerSourceImpl.java:117) at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMetrics(MetricsSourceAdapter.java:195) at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.snapshotMetrics(MetricsSystemImpl.java:419) at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.sampleMetrics(MetricsSystemImpl.java:406) at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.onTimerEvent(MetricsSystemImpl.java:382) at org.apache.hadoop.metrics2.impl.MetricsSystemImpl$4.run(MetricsSystemImpl.java:369) at java.util.TimerThread.mainLoop(Timer.java:555) at java.util.TimerThread.run(Timer.java:505)