>>Oh dear. Please file a bug on this. 
I just jointed to Hadoop mail-list, how to file a bug?

>>Which version of Hadoop are you  running? 
>>In particular, are you running with or without HADOOP-1553?  
My test version downloaded from
http://lucene.apache.org/hadoop/releases.html, 
which according the release note, "Hadoop release 0.14.0 available" 
by Doug Cutting  Aug 22, 2007; 01:16am. 

>>Do you have mapred.userlog.limit.kb set to 0 or non-0?
mapred.userlog.limit.kb set to 0 

>>The C++ library has two modes the binary and text protocols. It  
>>should always use the binary protocol, which it detects by having a  
>>environment variable hadoop.pipes.command.port or  
>>hadoop.pipes.command.file defined. 
I tried to set "hadoop.pipes.command.port" in hadoop-site.xml and still not
work.

>>Since you clearly had the text  
>>protocol running,  the environment must have been messed up somehow.  
>>The text protocol is really there to help me in debugging the  
>>framework, although it means that if you run a pipes program from the  
>>console you can interact with it.
Should all commands(ex. "start", "runMap", ...etc) transfer automatically by 
Hadoop pipe if the "hadoop.pipes.command.port〞works correctly? Or users
need to write something to do that?

ChaoChun


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