viirya commented on pull request #2481:
URL: https://github.com/apache/hadoop/pull/2481#issuecomment-731645339


   This looks unrelated...
   ```
   [ERROR] Tests run: 15, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 
110.802 s <<< FAILURE! - in org.apache.hadoop.hdfs.TestRollingUpgrade
   [ERROR] testRollback(org.apache.hadoop.hdfs.TestRollingUpgrade)  Time 
elapsed: 68.247 s  <<< ERROR!
   java.net.BindException: Problem binding to [localhost:42009] 
java.net.BindException: Address already in use; For more details see:  
http://wiki.apache.org/hadoop/BindException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:908)
        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:809)
        at org.apache.hadoop.ipc.Server.bind(Server.java:640)
        at org.apache.hadoop.ipc.Server$Listener.<init>(Server.java:1225)
        at org.apache.hadoop.ipc.Server.<init>(Server.java:3118)
        at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:1055)
        at 
org.apache.hadoop.ipc.ProtobufRpcEngine2$Server.<init>(ProtobufRpcEngine2.java:435)
        at 
org.apache.hadoop.ipc.ProtobufRpcEngine2.getServer(ProtobufRpcEngine2.java:350)
        at org.apache.hadoop.ipc.RPC$Builder.build(RPC.java:853)
        at 
org.apache.hadoop.hdfs.server.datanode.DataNode.initIpcServer(DataNode.java:1031)
        at 
org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:1452)
        at 
org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:513)
        at 
org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:2868)
        at 
org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:2774)
        at 
org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:2818)
        at 
org.apache.hadoop.hdfs.MiniDFSCluster.restartDataNode(MiniDFSCluster.java:2516)
        at 
org.apache.hadoop.hdfs.TestRollingUpgrade.rollbackRollingUpgrade(TestRollingUpgrade.java:386)
   ```


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