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From xeonmailinglist <xeonmailingl...@gmail.com>
Subject Re: "No FileSystem for scheme: hdfs" when submitting a remote job
Date Tue, 24 Feb 2015 19:23:33 GMT
Yes, this was the problem. But I have another question:

When I am starting a remote job, the job will run in the remote resource 
manager. But how the job that is running remotely will know where are 
the map and reduce functions?




On 24-02-2015 19:03, Xuan Gong wrote:
> Have you added hadoop-hdfs-xxxx.jar into your class path ?
>
> From: xeonmailinglist <xeonmailinglist@gmail.com 
> <mailto:xeonmailinglist@gmail.com>>
> Reply-To: "user@hadoop.apache.org <mailto:user@hadoop.apache.org>" 
> <user@hadoop.apache.org <mailto:user@hadoop.apache.org>>
> Date: Tuesday, February 24, 2015 at 10:57 AM
> To: "user@hadoop.apache.org <mailto:user@hadoop.apache.org>" 
> <user@hadoop.apache.org <mailto:user@hadoop.apache.org>>
> Subject: "No FileSystem for scheme: hdfs" when submitting a remote job
>
> Hi,
>
> I am trying to submit a remote mapreduce job in Yarn with the 
> configuration below, but I get the error |No FileSystem for scheme: 
> hdfs|. The error is so also below. Why this is happening?
>
> |          String host = "192.168.56.100";
>
>             Configuration conf = job.getConfiguration();
>             // this should be like defined in your yarn-site.xml
>             conf.set("yarn.resourcemanager.address", host + ":50001");
>
>              // framework is now "yarn", should be defined like this in mapred-site.xm
>              conf.set("mapreduce.framework.name", "yarn");
>
>              // like defined in hdfs-site.xml
>              conf.set("fs.defaultFS", "hdfs://" + host + ":9000");
>
>              for (Path inputPath : inputPaths)
>                  FileInputFormat.addInputPath(job, new Path(conf.get("fs.defaultFS")
+ "/" + inputPath.toString()));
>
>              FileOutputFormat.setOutputPath(job, new Path(conf.get("fs.defaultFS") +
"/" + tempPath));
>
>              job.waitForCompletion(true);
> |
> |Exception in thread "main" java.io.IOException: No FileSystem for scheme: hdfs
>      at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:2584)
>      at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2591)
>      at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:91)
>      at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2630)
>      at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2612)
>      at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:370)
>      at org.apache.hadoop.fs.Path.getFileSystem(Path.java:296)
>      at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.addInputPath(FileInputFormat.java:518)
>      at org.apache.hadoop.mapred.examples.JobExecution.submit(JobExecution.java:169)
>      at org.apache.hadoop.mapred.examples.WordCount.main(WordCount.java:101)
> |
>
> Thanks,
>
> ‚Äč


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