Description
The following stack trace is being generated
========
org.apache.hadoop.metrics2.MetricsException: Metrics source JvmMetrics already exists!
at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.newSourceName(DefaultMetricsSystem.java:126)
at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.sourceName(DefaultMetricsSystem.java:107)
at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:216)
at org.apache.hadoop.metrics2.source.JvmMetrics.create(JvmMetrics.java:80)
at org.apache.hadoop.mapreduce.v2.app.metrics.MRAppMetrics.create(MRAppMetrics.java:58)
at org.apache.hadoop.mapreduce.v2.app.metrics.MRAppMetrics.create(MRAppMetrics.java:54)
at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.<init>(MRAppMaster.java:186)
at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.<init>(MRAppMaster.java:170)
at org.apache.hadoop.mapreduce.v2.app.MRApp.<init>(MRApp.java:160)
at org.apache.hadoop.mapreduce.v2.app.TestRMContainerAllocator$1.<init>(TestRMContainerAllocator.java:372)
at org.apache.hadoop.mapreduce.v2.app.TestRMContainerAllocator.testReportedAppProgress(TestRMContainerAllocator.java:371)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
========
This test fails when git trunk is reset to - commit 6689d99b38c7c562e8cae484207ad30ad7b56eb5
but passes when git trunk is reset to - commit f429fdaf78a02211c4faee54b1ee92822edc5741