TestYarnConfigurationFields consistently keeps failing

Error Messageclass org.apache.hadoop.yarn.conf.YarnConfiguration has 1 variables missing in yarn-default.xml Entries:   yarn.scheduler.app-placement-allocator.class expected:<0> but was:<1>Stacktracejava.lang.AssertionError: class org.apache.hadoop.yarn.conf.YarnConfiguration has 1 variables missing in yarn-default.xml Entries:   yarn.scheduler.app-placement-allocator.class expected:<0> but was:<1>
	at org.junit.Assert.fail(Assert.java:89)
	at org.junit.Assert.failNotEquals(Assert.java:835)
	at org.junit.Assert.assertEquals(Assert.java:647)
	at org.apache.hadoop.conf.TestConfigurationFieldsBase.testCompareConfigurationClassAgainstXml(TestConfigurationFieldsBase.java:493)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)