I've added hadoop-eclipse-kepler-plugin-2.2.0.jar to the plugin folder, and
map/reduce is shown in open perspective menu, but when i click OK,
nothing happened.
Does anyone have an answer to this question? I have used both java 1.6 and 1.7 with both eclipse luna,kepler and europa with all hadoop plugin .jar files and still no luck.
Would really appreciate if someone had some solid advice to get the mapreduce job to run!
I am facing the same problem when adding Map/Reduce perspective.
I am getting this error: Plug-in org.apache.hadoop.eclipse was unable to load class org.apache.hadoop.eclipse.view.servers.ServerView.
Do you have any suggestion for this??
Excellent tutorial, the best for Hadoop beginners, I am 5 days trying to "swim" between different bugs and configurations when it comes running in the Windows platform. The CMD execution went fine, no errors. The only problem that I have when trying to run it through Eclipse. The error that I get is as follows:
Exception in thread "main" java.lang.NullPointerException
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1010)
at org.apache.hadoop.util.Shell.runCommand(Shell.java:445)
at org.apache.hadoop.util.Shell.run(Shell.java:418)
at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:650)
at org.apache.hadoop.util.Shell.execCommand(Shell.java:739)
at org.apache.hadoop.util.Shell.execCommand(Shell.java:722)
at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:631)
at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:421)
at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:277)
at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:125)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:348)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
at Recepti.main(Recepti.java:30)
This happens when I use jdk 7 for runtime/compilation. When using jdk 6, onether error show up:
java.lang.UnsupportedClassVersionError: Recipe : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Exception in thread "main"
Please suggest what could be the problem, so I can continue further with Hadoop programming.
Do I have to sign up in box for me to be able to download the hadoop-2.3.0.tar.gz file because it is not downloadable and you have not provided another link so far
Hello sir, I have a problem. Iam trying to run a similar mapreduce program. I have followed all your steps for running in windows. It worked perfectly fine untill i gave this command
hadoop jar c:\dcproject\Myprogram.jar JobName /input /out
The job got submitted but the mapping did not start. and the cmd kept on waiting for the mapping to start, which never happened
The dataset I used is a common CSV data set. so i think i do not need any extra jars. Can you please help out as soon as possible?
I also tried running the same Recipe program, and the result was same.. I just followed all the steps from the video.. PLease help out..
Thankyou
Could you pleas help me out in this issue .
Please find error .
hadoop-2.3.0\sbin>hadoop fs -copyFromLocal c:\hwork\recipeitems-latest.json /in
11/23 10:55:08 WARN hdfs.DFSClient: DataStreamer Exception
.apache.hadoop.ipc.RemoteException(java.io.IOException): File /in/recipeitems-latest.json._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1). There are 0 datanode(s) runn
and no node(s) are excluded inthis operation.
at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget(BlockManager.java:1406)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:2596)
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:563)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:407)
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1962)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1958)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1956)
at org.apache.hadoop.ipc.Client.call(Client.java:1406)
at org.apache.hadoop.ipc.Client.call(Client.java:1359)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206)
at $Proxy9.addBlock(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:186)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
at $Proxy9.addBlock(Unknown Source)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:348)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1264)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1112)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:522)
yFromLocal: File /in/recipeitems-latest.json._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1). There are 0 datanode(s) running and no node(s) are excluded inthis opera
n.
hadoop-2.3.0\sbin>
It's Showing datanode is n't running. please follow this commands
1. > jps
datanode
namenode
resource manager
node manager
2. format the hadoop namenode
> hadoop namenode -format
3. you configure the configuration files https://github.com/prabaprakash/Hadoop-2.3-Config[^]
4. You using windows 7/8/10 64 bit with jdk 6
...........
where is
>node manager
>resource manager
services is still missing.
open cmd
> cd c:\hadoop\sbin\
> start-yarn.cmd
> start-dfs.cmd
>jps
datanode
namenode
node manager
resource manager
the four is necessary to run a hadoop mapreduce...............
Hi Praba,
Thanks for your grate article and video... its very helpful for the installation
I too got the same error "Unsupported major.minor version 51.0" while eclipse plugin implementation. i am using java 6.1 (41) is this causing this error ? Any suggestion ?
I have a question regarding the replication of the system.
The replication is set to default which is 3. As I started uploading a file with 4 nodes in the cluster, only 3 nodes where given the replication. Why is that? And shouldn't the replication of the chunks be skipping?
Exception in thread "main"0: No such file or directory
at org.apache.hadoop.io.nativeio.NativeIO$POSIX.chmod(NativeIO.java:232)
at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:627)
at org.apache.hadoop.fs.FilterFileSystem.setPermission(FilterFileSystem.java:468)
at org.apache.hadoop.fs.FileSystem.mkdirs(FileSystem.java:598)
at org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSubmitter.java:179)
at org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSubmitter.java:301)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:389)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Unknown Source)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
at Recipe.main(Recipe.java:85)
main class code:
Java
publicstaticvoid main(String[] args) throws Exception {
Configuration conf = new Configuration();
/* String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
for ( String string : otherArgs) {
System.out.println(string);
}
if (otherArgs.length != 2) {
System.err.println("Usage: recipe <in> <out>");
System.exit(2);
}*/@SuppressWarnings("deprecation")
Job job = new Job(conf, "Recipe");
job.setJarByClass(Recipe.class);
job.setMapperClass(TokenizerMapper.class);
job.setCombinerClass(IntSumReducer.class);
job.setReducerClass(IntSumReducer.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(IntWritable.class);
// FileInputFormat.addInputPath(job, new Path(otherArgs[0]));// FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
FileInputFormat.addInputPath(job, new Path("hdfs://127.0.0.1:9000/user/hadoop/in/"));
FileOutputFormat.setOutputPath(job, new Path("hdfs://127.0.0.1:9000/user/hadoop/out/"));
//System.exit(job.waitForCompletion(true) ? 0 : 1);
job.submit();
}
Paths are fine as hadoop fs -ls /user/hadoop/in returns json file.
Help plz
I am facing the same exception like below . when i run the java program through eclipse
log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" 0: No such file or directory
at org.apache.hadoop.io.nativeio.NativeIO$POSIX.chmod(NativeIO.java:232)
at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:627)
at org.apache.hadoop.fs.FilterFileSystem.setPermission(FilterFileSystem.java:468)
at org.apache.hadoop.fs.FileSystem.mkdirs(FileSystem.java:598)
at org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSubmitter.java:179)
at org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSubmitter.java:301)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:389)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
at Recipe.main(Recipe.java:87)
From commandline, i am able to run the program , and i got the output . But i am getting error while running through eclipse