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From xeonmailinglist <xeonmailingl...@gmail.com>
Subject Re: Pass lib jars when invoking an hadoop program
Date Tue, 03 Feb 2015 18:00:17 GMT
Got it. Here's the solution:

```
vagrant@hadoop-coc-1:~/Programs/hadoop$ export 
HADOOP_CLASSPATH=share/hadoop/tools/lib/hadoop-distcp-2.6.0.jar; hadoop 
jar wordcount.jar -libjars 
$HADOOP_HOME/share/hadoop/tools/lib/hadoop-distcp-2.6.0.jar /input1 
/outputmp /output1
```

On 03-02-2015 14:58, xeonmailinglist wrote:
>
> Hi,
>
> I am trying to run |distcp| using a java class, but I get the error of 
> class not found |DistCpOptions|. I have used the argument |-libjars 
> ./share/hadoop/tools/lib/hadoop-distcp-2.6.0.jar| to pass the jar 
> file, but it seems that is not right. How I pass the lib properly?
>
> Output:
>
> |vagrant@hadoop-coc-1:~/Programs/hadoop$ hadoop jar wordcount.jar  -libjars ./share/hadoop/tools/lib/hadoop-distcp-2.6.0.jar
/input1 /outputmp /output1
> Configuration: core-default.xml, core-site.xml, mapred-default.xml, mapred-site.xml,
yarn-default.xml, yarn-site.xml, hdfs-default.xml, hdfs-site.xml
> -libjars
> ./share/hadoop/tools/lib/hadoop-distcp-2.6.0.jar
> /input1
> /outputmp
> /output1
> Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/tools/DistCpOptions
>      at org.apache.hadoop.mapred.examples.WordCount.main(WordCount.java:101)
>      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.util.RunJar.run(RunJar.java:221)
>      at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
> Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.tools.DistCpOptions
>      at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
>      at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
>      at java.security.AccessController.doPrivileged(Native Method)
>      at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
>      at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
>      at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
> |
>
> My class:
>
> |public static void main(String[] args) throws Exception {
>          Configuration conf = new Configuration();
>
>          String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
>          if (otherArgs.length < 2) {
>              System.err.println("Usage: wordcount <in> [<in>...] <out>");
>              System.exit(2);
>          }
>
>          System.out.println(conf.toString());
>          for (int i = 0; i < args.length; i++) {
>              System.out.println(args[i]);
>          }
>
>          // distcp
>          String proto = "webhdfs://";
>          String src = "hadoop-coc-1/input1";
>          String dest = "hadoop-coc-2/input1";
>          List<Path> lsrc = new ArrayList<Path>();
>          lsrc.add(new Path(src));
>          DistCpOptions options = new DistCpOptions(lsrc, new Path(dest));
>          DistCp distcp = new DistCp(new Configuration(), options);
>          distcp.execute();
>      }
> |
> ‚Äč


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