Hi everyone,

I know this is the common mistake to not specify the class adress while
trying to run a jar, however,
although I specified, I am still getting the ClassNotFound exception.

What may be the reason for it? I have been struggling for this problem more
than a 2 days.
I just wrote different MapReduce application for some anlaysis. I got this
problem.

To check, is there something wrong with my system, i tried to run WordCount
example.
When I just run hadoop-examples wordcount, it is working fine.

But when I add just "package org.myorg;" command at the beginning, it
doesnot work.

Here is what I have done so far
*************************************************************************
1. I just copied wordcount code from the apaches own examples source code
and I just changed package decleration as "package org.myorg;"
**************************************************************************
2. Then I tried to run that command:
 *************************************************************************
"hadoop jar wordcount_19_02.jar org.myorg.WordCount
/home/hadoop/project/hadoop-data/NetFlow 19_02_wordcount.output"
*************************************************************************
3. I got following error:
**************************************************************************
[hadoop@ADUAE042-LAP-V project]$ hadoop jar wordcount_19_02.jar
org.myorg.WordCount /home/hadoop/project/hadoop-data/NetFlow
19_02_wordcount.output
Warning: $HADOOP_HOME is deprecated.

Exception in thread "main" java.lang.ClassNotFoundException:
org.myorg.WordCount
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:266)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:149)

**************************************************************************
4. This is the content of my .jar file:
****************************************************
[hadoop@ADUAE042-LAP-V project]$ jar tf wordcount_19_02.jar
META-INF/
META-INF/MANIFEST.MF
wordcount_classes/
wordcount_classes/org/
wordcount_classes/org/myorg/
wordcount_classes/org/myorg/WordCount.class
wordcount_classes/org/myorg/WordCount$TokenizerMapper.class
wordcount_classes/org/myorg/WordCount$IntSumReducer.class
**********************************************************
5. This is the 'ls' output of my working directory:
**********************************************************
[hadoop@ADUAE042-LAP-V project]$ ls
flowclasses_18_02  flowclasses_18_02.jar  hadoop-1.0.4  hadoop-1.0.4.tar.gz
 hadoop-data  MapReduce.java  sample  wordcount_19_02.jar
 wordcount_classes  WordCountClasses  WordCount.java
*************************************************************
So as you see, package decleration is fine but I am really helpless, I
googled but they are all saying samething you should specify the package
hierarchy of your main class. I did know it already I am specifying but
doesn't work.

I would be much obliged to anyone helped me

Regards,

Your point (4) explains the problem. The jar packed structure should
look like the below, and not how it is presently (one extra top level
dir is present):

META-INF/
META-INF/MANIFEST.MF
org/
org/myorg/
org/myorg/WordCount.class
org/myorg/WordCount$TokenizerMapper.class
org/myorg/WordCount$IntSumReducer.class

On Tue, Feb 19, 2013 at 9:29 PM, Fatih Haltas <[EMAIL PROTECTED]> wrote:
> Hi everyone,
>
> I know this is the common mistake to not specify the class adress while
> trying to run a jar, however,
> although I specified, I am still getting the ClassNotFound exception.
>
> What may be the reason for it? I have been struggling for this problem more
> than a 2 days.
> I just wrote different MapReduce application for some anlaysis. I got this
> problem.
>
> To check, is there something wrong with my system, i tried to run WordCount
> example.
> When I just run hadoop-examples wordcount, it is working fine.
>
> But when I add just "package org.myorg;" command at the beginning, it
> doesnot work.
>
> Here is what I have done so far
> *************************************************************************
> 1. I just copied wordcount code from the apaches own examples source code
> and I just changed package decleration as "package org.myorg;"
> **************************************************************************
> 2. Then I tried to run that command:
>  *************************************************************************
> "hadoop jar wordcount_19_02.jar org.myorg.WordCount
> /home/hadoop/project/hadoop-data/NetFlow 19_02_wordcount.output"
> *************************************************************************
> 3. I got following error:
> **************************************************************************
> [hadoop@ADUAE042-LAP-V project]$ hadoop jar wordcount_19_02.jar
> org.myorg.WordCount /home/hadoop/project/hadoop-data/NetFlow
> 19_02_wordcount.output
> Warning: $HADOOP_HOME is deprecated.
>
> Exception in thread "main" java.lang.ClassNotFoundException:
> org.myorg.WordCount
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
>         at java.lang.Class.forName0(Native Method)
>         at java.lang.Class.forName(Class.java:266)
>         at org.apache.hadoop.util.RunJar.main(RunJar.java:149)
>
> **************************************************************************
> 4. This is the content of my .jar file:
> ****************************************************
> [hadoop@ADUAE042-LAP-V project]$ jar tf wordcount_19_02.jar
> META-INF/
> META-INF/MANIFEST.MF
> wordcount_classes/
> wordcount_classes/org/
> wordcount_classes/org/myorg/
> wordcount_classes/org/myorg/WordCount.class
> wordcount_classes/org/myorg/WordCount$TokenizerMapper.class
> wordcount_classes/org/myorg/WordCount$IntSumReducer.class
> **********************************************************
> 5. This is the 'ls' output of my working directory:
> **********************************************************
> [hadoop@ADUAE042-LAP-V project]$ ls
> flowclasses_18_02  flowclasses_18_02.jar  hadoop-1.0.4  hadoop-1.0.4.tar.gz
> hadoop-data  MapReduce.java  sample  wordcount_19_02.jar  wordcount_classes
> WordCountClasses  WordCount.java
> *************************************************************
> So as you see, package decleration is fine but I am really helpless, I
> googled but they are all saying samething you should specify the package
> hierarchy of your main class. I did know it already I am specifying but
> doesn't work.
>
> I would be much obliged to anyone helped me
>
> Regards,

--
Harsh J

Thank you very much Harsh,

Now, as I promised earlier I am much obliged to you.

But, now I solved that problem by just changing the directories then again
creating a jar file of org. but I am getting this error:

1.) What I got
------------------------------------------------------------------------------
[hadoop@ADUAE042-LAP-V flowclasses_18_02]$ hadoop jar flow19028pm.jar
org.myorg.MapReduce /home/hadoop/project/hadoop-data/NetFlow 19_02.out
Warning: $HADOOP_HOME is deprecated.

Exception in thread "main" java.lang.UnsupportedClassVersionError:
org/myorg/MapReduce : Unsupported major.minor version 51.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
        at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
        at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:266)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:149)

2.) How I create my jar
-------------------------------------------------------------------------------------
[hadoop@ADUAE042-LAP-V flowclasses_18_02]$ jar cvf flow19028pm.jar org
added manifest
adding: org/(in = 0) (out= 0)(stored 0%)
adding: org/myorg/(in = 0) (out= 0)(stored 0%)
adding: org/myorg/MapReduce$FlowPortReducer.class(in = 1661) (out690)(deflated 58%)
adding: org/myorg/MapReduce.class(in = 1587) (out= 903)(deflated 43%)
adding: org/myorg/MapReduce$FlowPortMapper.class(in = 1874) (out823)(deflated 56%)

3.) Content of my jar file
---------------------------------------------------------------------------------------
[hadoop@ADUAE042-LAP-V flowclasses_18_02]$ jar tf flow19028pm.jar
META-INF/
META-INF/MANIFEST.MF
org/
org/myorg/
org/myorg/MapReduce$FlowPortReducer.class
org/myorg/MapReduce.class
org/myorg/MapReduce$FlowPortMapper.class
-----------------------------------------------------------------------------------------
Thank you very much.
On Tue, Feb 19, 2013 at 8:20 PM, Harsh J <[EMAIL PROTECTED]> wrote:

> Your point (4) explains the problem. The jar packed structure should
> look like the below, and not how it is presently (one extra top level
> dir is present):
>
> META-INF/
> META-INF/MANIFEST.MF
> org/
> org/myorg/
> org/myorg/WordCount.class
> org/myorg/WordCount$TokenizerMapper.class
> org/myorg/WordCount$IntSumReducer.class
>
> On Tue, Feb 19, 2013 at 9:29 PM, Fatih Haltas <[EMAIL PROTECTED]>
> wrote:
> > Hi everyone,
> >
> > I know this is the common mistake to not specify the class adress while
> > trying to run a jar, however,
> > although I specified, I am still getting the ClassNotFound exception.
> >
> > What may be the reason for it? I have been struggling for this problem
> more
> > than a 2 days.
> > I just wrote different MapReduce application for some anlaysis. I got
> this
> > problem.
> >
> > To check, is there something wrong with my system, i tried to run
> WordCount
> > example.
> > When I just run hadoop-examples wordcount, it is working fine.
> >
> > But when I add just "package org.myorg;" command at the beginning, it
> > doesnot work.
> >
> > Here is what I have done so far
> > *************************************************************************
> > 1. I just copied wordcount code from the apaches own examples source code
> > and I just changed package decleration as "package org.myorg;"
> >
> **************************************************************************
> > 2. Then I tried to run that command:
> >
>  *************************************************************************

Hi,

The new error usually happens if you compile using Java 7 and try to
run via Java 6 (for example). That is, an incompatibility in the
runtimes for the binary artifact produced.

On Tue, Feb 19, 2013 at 10:09 PM, Fatih Haltas <[EMAIL PROTECTED]> wrote:
> Thank you very much Harsh,
>
> Now, as I promised earlier I am much obliged to you.
>
> But, now I solved that problem by just changing the directories then again
> creating a jar file of org. but I am getting this error:
>
> 1.) What I got
> ------------------------------------------------------------------------------
> [hadoop@ADUAE042-LAP-V flowclasses_18_02]$ hadoop jar flow19028pm.jar
> org.myorg.MapReduce /home/hadoop/project/hadoop-data/NetFlow 19_02.out
> Warning: $HADOOP_HOME is deprecated.
>
> Exception in thread "main" java.lang.UnsupportedClassVersionError:
> org/myorg/MapReduce : Unsupported major.minor version 51.0
>         at java.lang.ClassLoader.defineClass1(Native Method)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
>         at
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
>         at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
>         at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
>         at java.lang.Class.forName0(Native Method)
>         at java.lang.Class.forName(Class.java:266)
>         at org.apache.hadoop.util.RunJar.main(RunJar.java:149)
>
> 2.) How I create my jar
> -------------------------------------------------------------------------------------
> [hadoop@ADUAE042-LAP-V flowclasses_18_02]$ jar cvf flow19028pm.jar org
> added manifest
> adding: org/(in = 0) (out= 0)(stored 0%)
> adding: org/myorg/(in = 0) (out= 0)(stored 0%)
> adding: org/myorg/MapReduce$FlowPortReducer.class(in = 1661) (out> 690)(deflated 58%)
> adding: org/myorg/MapReduce.class(in = 1587) (out= 903)(deflated 43%)
> adding: org/myorg/MapReduce$FlowPortMapper.class(in = 1874) (out> 823)(deflated 56%)
>
> 3.) Content of my jar file
> ---------------------------------------------------------------------------------------
> [hadoop@ADUAE042-LAP-V flowclasses_18_02]$ jar tf flow19028pm.jar
> META-INF/
> META-INF/MANIFEST.MF
> org/
> org/myorg/
> org/myorg/MapReduce$FlowPortReducer.class
> org/myorg/MapReduce.class
> org/myorg/MapReduce$FlowPortMapper.class
> -----------------------------------------------------------------------------------------
>
>
> Thank you very much.
>
>
> On Tue, Feb 19, 2013 at 8:20 PM, Harsh J <[EMAIL PROTECTED]> wrote:
>>
>> Your point (4) explains the problem. The jar packed structure should
>> look like the below, and not how it is presently (one extra top level
>> dir is present):
>>
>> META-INF/
>> META-INF/MANIFEST.MF
>> org/
>> org/myorg/
>> org/myorg/WordCount.class
>> org/myorg/WordCount$TokenizerMapper.class
>> org/myorg/WordCount$IntSumReducer.class
>>
>> On Tue, Feb 19, 2013 at 9:29 PM, Fatih Haltas <[EMAIL PROTECTED]>
>> wrote:
>> > Hi everyone,
>> >
>> > I know this is the common mistake to not specify the class adress while
>> > trying to run a jar, however,
>> > although I specified, I am still getting the ClassNotFound exception.
>> >
>> > What may be the reason for it? I have been struggling for this problem
>> > more
>> > than a 2 days.
>> > I just wrote different MapReduce application for some anlaysis. I got
>> > this
>> > problem.
>> >
>> > To check, is there something wrong with my system, i tried to run
>> > WordCount
>> > example.
>> > When I just run hadoop-examples wordcount, it is working fine.
>> >
>> > But when I add just "package org.myorg;" command at the beginning, it
>> > doesnot work.

Harsh J

Thank you all very much

19 Şubat 2013 Salı tarihinde Harsh J adlı kullanıcı şöyle yazdı:

> Oops. I just noticed Hemanth has been answering on a dupe thread as
> well. Lets drop this thread and carry on there :)
>
> On Tue, Feb 19, 2013 at 11:14 PM, Harsh J <[EMAIL PROTECTED]> wrote:
> > Hi,
> >
> > The new error usually happens if you compile using Java 7 and try to
> > run via Java 6 (for example). That is, an incompatibility in the
> > runtimes for the binary artifact produced.
> >
> > On Tue, Feb 19, 2013 at 10:09 PM, Fatih Haltas <[EMAIL PROTECTED]>
> wrote:
> >> Thank you very much Harsh,
> >>
> >> Now, as I promised earlier I am much obliged to you.
> >>
> >> But, now I solved that problem by just changing the directories then
> again
> >> creating a jar file of org. but I am getting this error:
> >>
> >> 1.) What I got
> >>
> ------------------------------------------------------------------------------
> >> [hadoop@ADUAE042-LAP-V flowclasses_18_02]$ hadoop jar flow19028pm.jar
> >> org.myorg.MapReduce /home/hadoop/project/hadoop-data/NetFlow 19_02.out
> >> Warning: $HADOOP_HOME is deprecated.
> >>
> >> Exception in thread "main" java.lang.UnsupportedClassVersionError:
> >> org/myorg/MapReduce : Unsupported major.minor version 51.0
> >>         at java.lang.ClassLoader.defineClass1(Native Method)
> >>         at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
> >>         at
> >> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
> >>         at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
> >>         at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
> >>         at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
> >>         at java.security.AccessController.doPrivileged(Native Method)
> >>         at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
> >>         at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
> >>         at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
> >>         at java.lang.Class.forName0(Native Method)
> >>         at java.lang.Class.forName(Class.java:266)
> >>         at org.apache.hadoop.util.RunJar.main(RunJar.java:149)
> >>
> >> 2.) How I create my jar
> >>
> -------------------------------------------------------------------------------------
> >> [hadoop@ADUAE042-LAP-V flowclasses_18_02]$ jar cvf flow19028pm.jar org
> >> added manifest
> >> adding: org/(in = 0) (out= 0)(stored 0%)
> >> adding: org/myorg/(in = 0) (out= 0)(stored 0%)
> >> adding: org/myorg/MapReduce$FlowPortReducer.class(in = 1661) (out> >> 690)(deflated 58%)
> >> adding: org/myorg/MapReduce.class(in = 1587) (out= 903)(deflated 43%)
> >> adding: org/myorg/MapReduce$FlowPortMapper.class(in = 1874) (out> >> 823)(deflated 56%)
> >>
> >> 3.) Content of my jar file
> >>
> ---------------------------------------------------------------------------------------
> >> [hadoop@ADUAE042-LAP-V flowclasses_18_02]$ jar tf flow19028pm.jar
> >> META-INF/
> >> META-INF/MANIFEST.MF
> >> org/
> >> org/myorg/
> >> org/myorg/MapReduce$FlowPortReducer.class
> >> org/myorg/MapReduce.class
> >> org/myorg/MapReduce$FlowPortMapper.class
> >>
> -----------------------------------------------------------------------------------------
> >>
> >>
> >> Thank you very much.
> >>
> >>
> >> On Tue, Feb 19, 2013 at 8:20 PM, Harsh J <[EMAIL PROTECTED]> wrote:
> >>>
> >>> Your point (4) explains the problem. The jar packed structure should
> >>> look like the below, and not how it is presently (one extra top level
> >>> dir is present):
> >>>
> >>> META-INF/
> >>> META-INF/MANIFEST.MF
> >>> org/
> >>> org/myorg/
> >>> org/myorg/WordCount.class
> >>> org/myorg/WordCount$TokenizerMapper.class
> >>> org/myorg/WordCount$IntSumReducer.clas--
> Harsh J
>

Can you try this ? Pick a class like WordCount from your package and
execute this command:

javap -classpath <path to your jar> -verbose org.myorg.Wordcount | grep
version.

For e.g. here's what I get for my class:

$ javap -verbose WCMapper | grep version
  minor version: 0
  major version: 50

Please paste the output of this - we can verify what the problem is.

Thanks
Hemanth
On Sat, Feb 23, 2013 at 4:45 PM, Fatih Haltas <[EMAIL PROTECTED]> wrote:

> Hi again,
>
> Thanks for your help but now, I am struggling with the same problem on a
> machine. As the preivous problem, I just decrease the Java version by Java
> 6, but this time I could not solve the problem.
>
> those are outputs that may explain the situation:
>
> ---------------------------------------------------------------------------------------------------------------------------------------------
> 1. I could not run my own code, to check the system I just tried to run
> basic wordcount example without any modification, except package info.
> **************************************************
> COMMAND EXECUTED: hadoop jar my.jar org.myorg.WordCount NetFlow NetFlow.out
> Warning: $HADOOP_HOME is deprecated.
>
> Exception in thread "main" java.lang.UnsupportedClassVersionError:
> org/myorg/WordCount : Unsupported major.minor version 51.0
>         at java.lang.ClassLoader.defineClass1(Native Method)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
>         at
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
>         at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
>         at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
>         at java.lang.Class.forName0(Native Method)
>         at java.lang.Class.forName(Class.java:266)
>         at org.apache.hadoop.util.RunJar.main(RunJar.java:149)
>
> **************************************************************************************
> 2. Java version:
> ********************************
> COMMAND EXECUTED: java -version
> java version "1.6.0_24"
> OpenJDK Runtime Environment (IcedTea6 1.11.6)
> (rhel-1.33.1.11.6.el5_9-x86_64)
> OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
> **********************************
> 3. JAVA_HOME variable:
> **********************************
> COMMAND EXECUTED: echo $JAVA_HOME
> /usr/lib/jvm/jre-1.6.0-openjdk.x86_64
> ********************************************
> 4. HADOOP version:
> *******************************************
> COMMAND EXECUTED: hadoop version
> Warning: $HADOOP_HOME is deprecated.
>
> Hadoop 1.0.4
> Subversion
> https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.0 -r
> 1393290
> Compiled by hortonfo on Wed Oct  3 05:13:58 UTC 2012
> From source with checksum fe2baea87c4c81a2c505767f3f9b71f4
> ********************************************************
>
> Are these still incompatible with eachother? (Hadoop version and java
> version)
>
>
> Thank you very much.
>
>
> On Tue, Feb 19, 2013 at 10:26 PM, Fatih Haltas <[EMAIL PROTECTED]>wrote:
>
>> Thank you all very much
>>
>> 19 Şubat 2013 Salı tarihinde Harsh J adlı kullanıcı şöyle yazdı:
>>
>>> Oops. I just noticed Hemanth has been answering on a dupe thread as
>>> well. Lets drop this thread and carry on there :)
>>>
>>> On Tue, Feb 19, 2013 at 11:14 PM, Harsh J <[EMAIL PROTECTED]> wrote:
>>> > Hi,
>>> >
>>> > The new error usually happens if you compile using Java 7 and try to
>>> > run via Java 6 (for example). That is, an incompatibility in the
>>> > runtimes for the binary artifact produced.
>>> >
>>> > On Tue, Feb 19, 2013 at 10:09 PM, Fatih Haltas <[EMAIL PROTECTED]>
>>> wrote: