Hadoop example not working after installed

Question

Hi I recently installed hadoop 2.7.2 in a distributed mode, with the namenode being hadoop and datanode being hadoop1 and hadoop2 . When I do yarn jar /usr/local/hadoop/hadoop-2.7.2/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.2.jar pi 2 1000 in bash, it gives me error message like:

Number of Maps  = 2
Samples per Map = 1000
java.io.IOException: Failed on local exception: com.google.protobuf.InvalidProtocolBufferException: Protocol message tag had invalid wire type.; Host Details : local host is: "benji/192.168.1.4"; destination host is: "hadoop":9000; 
    at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:773)
    at org.apache.hadoop.ipc.Client.call(Client.java:1479)
    at org.apache.hadoop.ipc.Client.call(Client.java:1412)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
    at com.sun.proxy.$Proxy9.getFileInfo(Unknown Source)
    at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:771)
    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:191)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
    at com.sun.proxy.$Proxy10.getFileInfo(Unknown Source)
    at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:2108)
    at org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:1305)
    at org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:1301)
    at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
    at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1301)
    at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1424)
    at org.apache.hadoop.examples.QuasiMonteCarlo.estimatePi(QuasiMonteCarlo.java:278)
    at org.apache.hadoop.examples.QuasiMonteCarlo.run(QuasiMonteCarlo.java:354)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.examples.QuasiMonteCarlo.main(QuasiMonteCarlo.java:363)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:71)
    at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144)
    at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)
    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.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: com.google.protobuf.InvalidProtocolBufferException: Protocol message tag had invalid wire type.
    at com.google.protobuf.InvalidProtocolBufferException.invalidWireType(InvalidProtocolBufferException.java:99)
    at com.google.protobuf.UnknownFieldSet$Builder.mergeFieldFrom(UnknownFieldSet.java:498)
    at com.google.protobuf.GeneratedMessage.parseUnknownField(GeneratedMessage.java:193)
    at org.apache.hadoop.ipc.protobuf.RpcHeaderProtos$RpcResponseHeaderProto.<init>(RpcHeaderProtos.java:2207)
    at org.apache.hadoop.ipc.protobuf.RpcHeaderProtos$RpcResponseHeaderProto.<init>(RpcHeaderProtos.java:2165)
    at org.apache.hadoop.ipc.protobuf.RpcHeaderProtos$RpcResponseHeaderProto$1.parsePartialFrom(RpcHeaderProtos.java:2295)
    at org.apache.hadoop.ipc.protobuf.RpcHeaderProtos$RpcResponseHeaderProto$1.parsePartialFrom(RpcHeaderProtos.java:2290)
    at com.google.protobuf.AbstractParser.parsePartialFrom(AbstractParser.java:200)
    at com.google.protobuf.AbstractParser.parsePartialDelimitedFrom(AbstractParser.java:241)
    at com.google.protobuf.AbstractParser.parseDelimitedFrom(AbstractParser.java:253)
    at com.google.protobuf.AbstractParser.parseDelimitedFrom(AbstractParser.java:259)
    at com.google.protobuf.AbstractParser.parseDelimitedFrom(AbstractParser.java:49)
    at org.apache.hadoop.ipc.protobuf.RpcHeaderProtos$RpcResponseHeaderProto.parseDelimitedFrom(RpcHeaderProtos.java:3167)
    at org.apache.hadoop.ipc.Client$Connection.receiveRpcResponse(Client.java:1085)
    at org.apache.hadoop.ipc.Client$Connection.run(Client.java:979)

And if I do hadoop jar /usr/local/hadoop/hadoop-2.7.2/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.2.jar pi 2 1000 , it gives error message like:

Number of Maps  = 2
Samples per Map = 1000
java.io.IOException: Failed on local exception: com.google.protobuf.InvalidProtocolBufferException: Protocol message tag had invalid wire type.; Host Details : local host is: "hadoop/192.168.1.4"; destination host is: "hadoop":9000;
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:773)
... blabla ...

Notice the weird mysterious difference between the two error messages lies in local host name (one is benji/192.168.1.4 and the other is hadoop/192.168.1.4 ). I do start-dfs.sh , and start-yarn.sh before the yarn jar ... , all look well.

I will be very much appreciate if anyone can help to figure out the problem. Here are contents of some configuration files:

• /etc/hosts file ( benji is the non-hadoop account on the master computer):

   192.168.1.4 hadoop benji 192.168.1.5 hadoop1 192.168.1.9 hadoop2 

• /etc/hostname file:

   hadoop 

• ~/.ssh/config file:

   # hadoop1 Host hadoop1 HostName 192.168.1.5 User hadoop1 IdentityFile ~/.ssh/hadoopid # hadoop2 Host hadoop2 HostName 192.168.1.9 User hadoop2 IdentityFile ~/.ssh/hadoopid # hadoop localhost Host localhost HostName localhost User hadoop IdentityFile ~/.ssh/hadoopid # hadoop Host hadoop HostName hadoop User hadoop IdentityFile ~/.ssh/hadoopid 

• core-site.xml file:

   <configuration> <property> <name>hadoop.tmp.dir</name> <value>file:///usr/local/hadoop/hadoopdata/tmp</value> <description>A base for other temporary directories.</description> </property> <property> <name>fs.defaultFS</name> <value>hdfs://hadoop:9000</value> </property> <property> <name>io.file.buffer.size</name> <value>131072</value> </property> </configuration> 

• hdfs-site.xml file:

   <configuration> <property> <name>dfs.namenode.name.dir</name> <value>file:///usr/local/hadoop/hadoopdata/dfs/namenode</value> </property> <property> <name>dfs.datanode.du.reserved</name> <value>21474836480</value> </property> <property> <name>dfs.datanode.data.dir</name> <value>file:///usr/local/hadoop/hadoopdata/dfs/datanode</value> </property> <property> <name>dfs.replication</name> <value>1</value> </property> <property> <name>dfs.namenode.secondary.http-address</name> <value>hadoop:9001</value> </property> <property> <name>dfs.webhdfs.enabled</name> <value>true</value> </property> </configuration> 

Could anyone help on this issue? Thanks!

UPDATE 1

I figured out part of the problem. I did jps and found datanode and namenode was not running. After netstat -an | grep 9000 netstat -an | grep 9000 and lsof -i :9000 I found that another process is listening the port 9000 . The namenode was able to run after I changed fs.defaultFS from hdfs://hadoop:9000 to hdfs://hadoop:9001 in the core-site.xml file, and dfs.namenode.secondary.http-address from hadoop:9001 to hadoop:9002 in hdfs-site.xml . The protocol-buffer error message disappeared after this change. But the datanodes were still not running according to the result of jps .

The datanode log file shows something weird happening:

... blabla ...
2016-05-19 12:27:12,157 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop/192.168.
1.4:9000. Already tried 44 time(s); maxRetries=45
2016-05-19 12:27:32,158 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to se
rver: hadoop/192.168.1.4:9000
... blabla ...
2016-05-19 13:41:55,382 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: RECEIVED SIGNAL 15: SIGTERM
2016-05-19 13:41:55,387 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: 
... blabla ...

I do not understand why the datanode tries to connect to the namenode on port 9000.

Answer 1

您应该在所有从属服务器上安装已配置的Hadoop软件包，仅将namenode中的fs.defaultFS更改为hdfs://hadoop:9001但不会将数据fs.defaultFS尝试连接到hdfs://hadoop:900因为它是在他们的core-site.xml 。