java.lang.AssertionError: expected null, but was:<javax.management.openmbean.CompositeDataSupport(compositeType=javax.management.openmbean.CompositeType(name=org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo$Bean,items=((itemName=blockPoolId,itemType=javax.management.openmbean.SimpleType(name=java.lang.String)),(itemName=createdRollbackImages,itemType=javax.management.openmbean.SimpleType(name=java.lang.Boolean)),(itemName=finalizeTime,itemType=javax.management.openmbean.SimpleType(name=java.lang.Long)),(itemName=startTime,itemType=javax.management.openmbean.SimpleType(name=java.lang.Long)))),contents={blockPoolId=BP-421661364-67.195.81.153-1452420365057, createdRollbackImages=true, finalizeTime=0, startTime=1452420366966})>

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Solutions on the web

via hadoop-hdfs-dev by Apache Jenkins Server, 1 year ago
=startTime,itemType=javax.management.openmbean.SimpleType(name=java.lang.Long)))),contents={blockPoolId=BP-421661364-67.195.81.153-1452420365057, createdRollbackImages=true, finalizeTime=0, startTime=1452420366966})>
via hadoop-hdfs-dev by Apache Jenkins Server, 1 year ago
expected null, but was:<javax.management.openmbean.CompositeDataSupport(compositeType=javax.management.openmbean.CompositeType(name=org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo$Bean,items=((itemName=blockPoolId,itemType
via hadoop-hdfs-dev by Apache Jenkins Server, 1 year ago
expected null, but was:<javax.management.openmbean.CompositeDataSupport(compositeType=javax.management.openmbean.CompositeType(name=org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo$Bean,items=((itemName=blockPoolId,itemType
via GitHub by egonw
, 1 year ago
expected null, but was:<>
via GitHub by nishantmonu51
, 1 year ago
expected null, but was:<2,2,1461091070509,1461091070509,0,2,0,0,11,0,5 >
via GitHub by pjain1
, 2 years ago
expected null, but was:<10,10,1447436227166,1447436227166,0,0,0,94859180405555201,25,0,10>
java.lang.AssertionError: expected null, but was:<javax.management.openmbean.CompositeDataSupport(compositeType=javax.management.openmbean.CompositeType(name=org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo$Bean,items=((itemName=blockPoolId,itemType=javax.management.openmbean.SimpleType(name=java.lang.String)),(itemName=createdRollbackImages,itemType=javax.management.openmbean.SimpleType(name=java.lang.Boolean)),(itemName=finalizeTime,itemType=javax.management.openmbean.SimpleType(name=java.lang.Long)),(itemName=startTime,itemType=javax.management.openmbean.SimpleType(name=java.lang.Long)))),contents={blockPoolId=BP-421661364-67.195.81.153-1452420365057, createdRollbackImages=true, finalizeTime=0, startTime=1452420366966})>	at org.junit.Assert.fail(Assert.java:88)	at org.junit.Assert.failNotNull(Assert.java:664)	at org.junit.Assert.assertNull(Assert.java:646)	at org.junit.Assert.assertNull(Assert.java:656)	at org.apache.hadoop.hdfs.TestRollingUpgrade.checkMxBeanIsNull(TestRollingUpgrade.java:294)	at org.apache.hadoop.hdfs.TestRollingUpgrade.testRollback(TestRollingUpgrade.java:323)