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HDFS >> mail # dev >> About debugging HDFS and MapReduce...


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Re: About debugging HDFS and MapReduce...
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What version of Hadoop are you using ?

Thanks

On Oct 6, 2013, at 8:56 PM, 남윤민 <[EMAIL PROTECTED]> wrote:

> Hello!!
> My name is Yoonmin Nam from South Korea.
>
> Currently, I am trying to debug namenode and datanode using eclipse and fully-distributed environemnt in my lab. (1 master and 10 nodes)
>
> However, I can do debug but not fully, just some portion of source code of hadoop.
>
> This means I cannot see how some daemon thread such as DataStreamer.
> Also, I want to see how NameNode thread and DataNode thread work but I can't.
>
> As you can see, there is Daemon thread (Thre ad-2) and it might be DataStreamer thread but.. I can't see.
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>  
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> So, I think everyone in the hdfs-dev have very professional experience in developing HDFS and MapReduce and I want to ask you about how can I see all real daemons are working for academic reason.
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> Even you have no idea about it, may I ask you that how you test your implementation of HDFS or MapReduce?
>
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> Thanks!!
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> // Yoonmin Nam
>