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https://issues.apache.org/jira/browse/HADOOP-16171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17283016#comment-17283016
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Dhirendra Pandit commented on HADOOP-16171:
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I am also facing the same issue, please do let me know if any workaround is
possible for this problem.
> deploy hadoop3.1.2 and runtime raise a Error, i dont know why
> -------------------------------------------------------------
>
> Key: HADOOP-16171
> URL: https://issues.apache.org/jira/browse/HADOOP-16171
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 3.1.2
> Reporter: mzh
> Priority: Major
>
> public static void main(String[] args) throws IOException {
> FileSystem fileSystem = FileSystem.get(new Configuration());
> fileSystem.copyToLocalFile(new
> Path("hdfs://centos:9000/hadoop3.1.2"), new Path("jarsss"));
> }
> This is very simple demo. but tell me a ClassCastException
>
> Exception in thread "main" java.lang.ClassCastException:
> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$GetFileInfoRequestProto
> cannot be cast to com.google.protobuf.Message
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:225)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116)
> at com.sun.proxy.$Proxy9.getFileInfo(Unknown Source)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:903)
> 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)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:422)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:165)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:157)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:359)
> at com.sun.proxy.$Proxy10.getFileInfo(Unknown Source)
> at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1665)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$29.doCall(DistributedFileSystem.java:1582)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$29.doCall(DistributedFileSystem.java:1579)
> at
> org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1594)
> at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:386)
> at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:337)
> at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:2434)
> at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:2403)
> at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:2379)
> at zhcn.mzh.hadoop.Main.main(Main.java:14)
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