I've been trying to launch Hadoop by typing any command, for example, entering " Hadoop fs -ls" in the terminal and I get this error      WARN ipc.Client: Failed to connect to server: quickstart.cloudera/XXX.XXX.XX.128:8020: try once and fail. java.net.NoRouteToHostException: No route to host at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739) at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206) at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:530) at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:494) at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:648) at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:744) at org.apache.hadoop.ipc.Client$Connection.access$3000(Client.java:396) at org.apache.hadoop.ipc.Client.getConnection(Client.java:1557) at org.apache.hadoop.ipc.Client.call(Client.java:1480) at org.apache.hadoop.ipc.Client.call(Client.java:1441) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:230) at com.sun.proxy.$Proxy16.getFileInfo(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:786) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:260) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:104) at com.sun.proxy.$Proxy17.getFileInfo(Unknown Source) at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:2131) at org.apache.hadoop.hdfs.DistributedFileSystem$20.doCall(DistributedFileSystem.java:1265) at org.apache.hadoop.hdfs.DistributedFileSystem$20.doCall(DistributedFileSystem.java:1261) at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81) at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1261) at org.apache.hadoop.fs.Globber.getFileStatus(Globber.java:64) at org.apache.hadoop.fs.Globber.doGlob(Globber.java:272) at org.apache.hadoop.fs.Globber.glob(Globber.java:151) at org.apache.hadoop.fs.FileSystem.globStatus(FileSystem.java:1715) at org.apache.hadoop.fs.shell.PathData.expandAsGlob(PathData.java:326) at org.apache.hadoop.fs.shell.Command.expandArgument(Command.java:235) at org.apache.hadoop.fs.shell.Command.expandArguments(Command.java:218) at org.apache.hadoop.fs.shell.FsCommand.processRawArguments(FsCommand.java:102) at org.apache.hadoop.fs.shell.Command.run(Command.java:165) at org.apache.hadoop.fs.FsShell.run(FsShell.java:315) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84) at org.apache.hadoop.fs.FsShell.main(FsShell.java:372) ls: No Route to Host from quickstart.cloudera/XXX.XXX.XX.128 to quickstart.cloudera:8020 failed on socket timeout exception: java.net.NoRouteToHostException: No route to host; For more details see: http://wiki.apache.org/hadoop/NoRouteToHost Notice Hadoop was running perfectly after my IP suddenly changed to XXX.XXX.XX.129. this error accrued. I don't know how to make/configure Hadoop launch on the same IP address    Thank you   ... View more

hello, I Want to make a demo which includes kafka, spark and Hbase. For example having files store it in kafka topic, then spark streaming will read and navigate the files from kafka topic and performs some filtering analysis and stores the records into the Hbase. before saving it hbase, first I need to check the resulted record in Hbase whether if it exists or not based on its' date. also I want to ask something else, can I join table from hive with the data files before performing spark analysis from spark. can anyone please provide a step by step guide in java. I am new to hadoop. Thank you ... View more