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via Spring JIRA by Ilayaperumal Gopinathan, 2 years ago
Server IPC version 9 cannot communicate with client version 4
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Server IPC version 9 cannot communicate with client version 4*
org.apache.hadoop.ipc.RemoteException: Server IPC version 9 cannot communicate with client version 4	at org.apache.hadoop.ipc.Client.call(Client.java:1113)	at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)	at com.sun.proxy.$Proxy8.getProtocolVersion(Unknown Source)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:601)	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:85)	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:62)	at com.sun.proxy.$Proxy8.getProtocolVersion(Unknown Source)	at org.apache.hadoop.ipc.RPC.checkVersion(RPC.java:422)	at org.apache.hadoop.hdfs.DFSClient.createNamenode(DFSClient.java:183)	at org.apache.hadoop.hdfs.DFSClient.(DFSClient.java:281)	at org.apache.hadoop.hdfs.DFSClient.(DFSClient.java:245)	at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:100)	at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1446)	at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:67)	at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1464)	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:263)	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:124)	at org.springframework.xd.test.hadoop.HadoopFileSystemTestSupport.obtainResource(HadoopFileSystemTestSupport.java:49)	at org.springframework.xd.test.AbstractExternalResourceTestSupport.apply(AbstractExternalResourceTestSupport.java:58)	at org.junit.rules.RunRules.applyAll(RunRules.java:26)	at org.junit.rules.RunRules.(RunRules.java:15)	at org.junit.runners.BlockJUnit4ClassRunner.withTestRules(BlockJUnit4ClassRunner.java:379)	at org.junit.runners.BlockJUnit4ClassRunner.withRules(BlockJUnit4ClassRunner.java:340)	at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:256)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)