Its the problem of multiple versions of same jar.
On Thu, Jul 21, 2011 at 5:15 PM, Steve Loughran <[EMAIL PROTECTED]> wrote:
> On 20/07/11 07:16, Juwei Shi wrote:
>> We faced a problem of loading logging class when start the name node. It
>> seems that hadoop can not find commons-logging-*.jar
>> We have tried other commons-logging-1.0.4.jar and
>> commons-logging-api-1.0.4.jar. It does not work!
>> The following are error logs from starting console:
> I'd drop the -api file as it isn't needed, and as you say, avoid duplicate
> versions. Make sure that log4j is at the same point in the class hierarchy
> too (e.g in hadoop/lib)
> to debug commons logging, tell it to log to stderr. It's useful in