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Hadoop, mail # user - problem while running wordcount on lion x


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Jignesh Patel 2011-10-06, 00:13
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Brock Noland 2011-10-06, 00:16
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Jignesh Patel 2011-10-06, 00:31
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Re: problem while running wordcount on lion x
Brock Noland 2011-10-06, 00:35
Hi,

Answers, inline.

On Wed, Oct 5, 2011 at 7:31 PM, Jignesh Patel <[EMAIL PROTECTED]> wrote:

>  have used eclipse to export the file and then got following error
>
> hadoop-user$ bin/hadoop jar
> wordcountsmp/wordcount.jarorg.apache.hadoop.examples.WordCount input output
>
>
> Exception in thread "main" java.io.IOException: Error opening job jar:
> wordcountsmp/wordcount.jarorg.apache.hadoop.examples.WordCount
>        at org.apache.hadoop.util.RunJar.main(RunJar.java:90)
> 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:127)
>        at java.util.jar.JarFile.<init>(JarFile.java:135)
>        at java.util.jar.JarFile.<init>(JarFile.java:72)
>        at org.apache.hadoop.util.RunJar.main(RunJar.java:88)
>
>
OK, the problem above is that you are missing a space, it should be:

hadoop-user$ bin/hadoop jar wordcountsmp/wordcount.jar
org.apache.hadoop.examples.WordCount input output

with a space between the jar and the class name.
> I tried following
> java -jar xf wordcountsmp/wordcount.jar
>

That's not how you extract a jar. It should be:

jar tf wordcountsmp/wordcount.jar

to get a listing of the jar and:

jar xf wordcountsmp/wordcount.jar

To extract it.
> and got the error
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> Unable to access jar file xf
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> my jar file size is 5kb. I am feeling somehow eclipse export in macOS is
> not creating appropriate jar.
>
>
>
>
> On Oct 5, 2011, at 8:16 PM, Brock Noland wrote:
>
> > Hi,
> >
> > On Wed, Oct 5, 2011 at 7:13 PM, Jignesh Patel <[EMAIL PROTECTED]>
> wrote:
> >>
> >>
> >> I also found another problem if I directly export from eclipse as a jar
> >> file then while trying javac -jar or hadoop -jar doesn't recognize that
> jar.
> >> However same jar works well with windows.
> >
> >
> >
> > Can you please share the error message? Note, the structure of the hadoop
> > command is:
> >
> > hadoop jar file.jar class.name
> >
> > Note, no - in front of jar like `java -jar'
> >
> > Brock
>
>
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Jignesh Patel 2011-10-06, 02:22
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Jignesh Patel 2011-10-06, 14:20