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Posted to common-user@hadoop.apache.org by Li Li <fa...@gmail.com> on 2012/09/10 12:26:49 UTC

NoSuchMethodException when using old mapred apis

hi all,
    I am trying an example from an tutorial for version 0.19 by using
hadoop 1.0.3.
    and it compiles but fail when running in pseudo distributed mode.
    I found a question in stackoverflow
http://stackoverflow.com/questions/11961517/new-to-hadoop-mapreduce-getting-a-nosuchmethodexception-on-mapred-reducer-init
    if I don't use older version, I can't run older codes?
    if that's true, why don't remove these apis and leave them there?

Re: NoSuchMethodException when using old mapred apis

Posted by Li Li <fa...@gmail.com>.

thanks.

On Mon, Sep 10, 2012 at 7:35 PM, Harsh J <ha...@cloudera.com> wrote:
> P.s. Please see my reply on the stackoverflow link you'd sent, if you
> are hitting the same problem.
>
> On Mon, Sep 10, 2012 at 4:53 PM, Harsh J <ha...@cloudera.com> wrote:
>> Hi,
>>
>> Your failure seems to be in the task-side. I suspect a mix of libraries.
>>
>> What version of Hadoop are you *deploying* across all nodes?
>>
>> On Mon, Sep 10, 2012 at 3:56 PM, Li Li <fa...@gmail.com> wrote:
>>> hi all,
>>>     I am trying an example from an tutorial for version 0.19 by using
>>> hadoop 1.0.3.
>>
>> Why do that when 1.0.3 has its own examples and tutorials at
>> http://hadoop.apache.org/common/docs/stable/?
>>
>>>     and it compiles but fail when running in pseudo distributed mode.
>>
>> I packaged your code from the below link and am able to run it just
>> fine on 1.0.3. and a bunch of other versions I have on my machine.
>>
>> Could you share your specific error please?
>>
>>>     I found a question in stackoverflow
>>> http://stackoverflow.com/questions/11961517/new-to-hadoop-mapreduce-getting-a-nosuchmethodexception-on-mapred-reducer-init
>>>     if I don't use older version, I can't run older codes?
>>
>> The answer there is bogus. There is no such issue that makes you not
>> use mapred.* API over mapreduce.*. The problem was something else that
>> should've taken some more debugging to find out, but the asker now
>> believes it was the use of the stable API.
>>
>> --
>> Harsh J
>
>
>
> --
> Harsh J

Re: NoSuchMethodException when using old mapred apis

Posted by Li Li <fa...@gmail.com>.

thanks.

On Mon, Sep 10, 2012 at 7:35 PM, Harsh J <ha...@cloudera.com> wrote:
> P.s. Please see my reply on the stackoverflow link you'd sent, if you
> are hitting the same problem.
>
> On Mon, Sep 10, 2012 at 4:53 PM, Harsh J <ha...@cloudera.com> wrote:
>> Hi,
>>
>> Your failure seems to be in the task-side. I suspect a mix of libraries.
>>
>> What version of Hadoop are you *deploying* across all nodes?
>>
>> On Mon, Sep 10, 2012 at 3:56 PM, Li Li <fa...@gmail.com> wrote:
>>> hi all,
>>>     I am trying an example from an tutorial for version 0.19 by using
>>> hadoop 1.0.3.
>>
>> Why do that when 1.0.3 has its own examples and tutorials at
>> http://hadoop.apache.org/common/docs/stable/?
>>
>>>     and it compiles but fail when running in pseudo distributed mode.
>>
>> I packaged your code from the below link and am able to run it just
>> fine on 1.0.3. and a bunch of other versions I have on my machine.
>>
>> Could you share your specific error please?
>>
>>>     I found a question in stackoverflow
>>> http://stackoverflow.com/questions/11961517/new-to-hadoop-mapreduce-getting-a-nosuchmethodexception-on-mapred-reducer-init
>>>     if I don't use older version, I can't run older codes?
>>
>> The answer there is bogus. There is no such issue that makes you not
>> use mapred.* API over mapreduce.*. The problem was something else that
>> should've taken some more debugging to find out, but the asker now
>> believes it was the use of the stable API.
>>
>> --
>> Harsh J
>
>
>
> --
> Harsh J

Re: NoSuchMethodException when using old mapred apis

Posted by Li Li <fa...@gmail.com>.

thanks.

On Mon, Sep 10, 2012 at 7:35 PM, Harsh J <ha...@cloudera.com> wrote:
> P.s. Please see my reply on the stackoverflow link you'd sent, if you
> are hitting the same problem.
>
> On Mon, Sep 10, 2012 at 4:53 PM, Harsh J <ha...@cloudera.com> wrote:
>> Hi,
>>
>> Your failure seems to be in the task-side. I suspect a mix of libraries.
>>
>> What version of Hadoop are you *deploying* across all nodes?
>>
>> On Mon, Sep 10, 2012 at 3:56 PM, Li Li <fa...@gmail.com> wrote:
>>> hi all,
>>>     I am trying an example from an tutorial for version 0.19 by using
>>> hadoop 1.0.3.
>>
>> Why do that when 1.0.3 has its own examples and tutorials at
>> http://hadoop.apache.org/common/docs/stable/?
>>
>>>     and it compiles but fail when running in pseudo distributed mode.
>>
>> I packaged your code from the below link and am able to run it just
>> fine on 1.0.3. and a bunch of other versions I have on my machine.
>>
>> Could you share your specific error please?
>>
>>>     I found a question in stackoverflow
>>> http://stackoverflow.com/questions/11961517/new-to-hadoop-mapreduce-getting-a-nosuchmethodexception-on-mapred-reducer-init
>>>     if I don't use older version, I can't run older codes?
>>
>> The answer there is bogus. There is no such issue that makes you not
>> use mapred.* API over mapreduce.*. The problem was something else that
>> should've taken some more debugging to find out, but the asker now
>> believes it was the use of the stable API.
>>
>> --
>> Harsh J
>
>
>
> --
> Harsh J