CODEWITHSUNDEEP
hadoopmapreduce
Uselesssss
Uselesssss

Reputation: 2133

Hadoop map-Reduce program not runing

I'm new to Hadoop MapReduce. When I'm trying to run my MapReduce code using the following command:

vishal@XXXX bin/hadoop jar /user/vishal/WordCount com.WordCount.java /user/vishal/file01 /user/vishal/output.

It displays the following output:

   Exception in thread "main" java.io.IOException: Error opening job jar: /user/vishal/WordCount.jar     
    at org.apache.hadoop.util.RunJar.main(RunJar.java:130)          
    Caused by: java.util.zip.ZipException: error in opening zip file    
    at java.util.zip.ZipFile.open(Native Method)     
    at java.util.zip.ZipFile.<init>(ZipFile.java:131)    
    at java.util.jar.JarFile.<init>(JarFile.java:150)    
    at java.util.jar.JarFile.<init>(JarFile.java:87)    
    at org.apache.hadoop.util.RunJar.main(RunJar.java:128)

How can I fix this error?

Upvotes: 1

Views: 802

Answers (1)

HXCaine
HXCaine

Reputation: 4258

Your command is asking Hadoop to run a JAR but is specifying a directory instead.

You have also added '.java' to the class name, which is not required. (This is assuming you have written the package name, com.WordCount, correctly).

First build the jar in /user/vishal/WordCount.jar (ensure this is a local directory, not HDFS) then run the command without the '.java' at the end of the class name. Also, you put a dot at the end of the command in your question, I hope that isn't there in the real command.

bin/hadoop jar /user/vishal/WordCount.jar com.WordCount /user/vishal/file01 /user/vishal/output

See the Hadoop tutorial's 'Usage' section for more.

Upvotes: 1

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