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From Jarek Jarcec Cecho <jar...@apache.org>
Subject Re: sqoop generate java class in old mapreduce API?
Date Mon, 12 Aug 2013 00:34:49 GMT
Hi Yongbo,
I believe that the writable itself should be independent on the new vs. old mapreduce API.
Would you mind sharing more details about your use case? Maybe a small code example reproducing
the issue could help us move forward.

Jarcec

On Thu, Aug 08, 2013 at 09:10:50PM +0800, Wu YongBo wrote:
> Hi All,
> 
>  
> 
>   I am using a java class generated by sqoop(1.4.2),  and I get the
> following error:
> 
>  
> 
> 2013-08-08 20:43:10,854 WARN org.apache.hadoop.mapred.TaskTracker: Error
> running child
> 
> java.lang.ClassCastException: class com.a.semv.io.semreportbase_keyword
> 
>         at java.lang.Class.asSubclass(Class.java:3018)
> 
>         at
> org.apache.hadoop.mapred.JobConf.getOutputKeyComparator(JobConf.java:599)
> 
>         at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:791)
> 
>         at
> org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>(MapTask.java:524)
> 
>         at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:613)
> 
>         at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
> 
>         at org.apache.hadoop.mapred.Child.main(Child.java:170)
> 
>  
> 
> My job is written in mapreduce new API.
> 
> My hadoop version:0.20.2
> 
>  
> 
> Thanks,
> 
> Yongbo
> 
>  
> 

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