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Date: Mon, 4 Nov 2013 17:28:38 +0800
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 <CAMPNBf6DNsJ8XwdroiPA8XQkO76VnuK=0zSFn1ztOEZe3+kBMg@mail.gmail.com>
Subject: Re: trace class calls in hadoop hdfs
From: Bing Jiang <jiangbinglover@gmail.com>
To: user@hadoop.apache.org
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I think you can try to use jdb, which exists in $JAVA_HOME/bin.

Regards
Bing


2013/11/4 Karim Awara <karim.awara@kaust.edu.sa>

> Hi,
>
> I want to trace the calls that both the DataNode and the NameNode do when
> I execute a shell command on the hdfs such as (hadoop dfs -put {src}
> {dst}). Any idea how to do that?
>
>
> ; tracing including the data node asking the name node for the blockID..
> also the class where datanode use to determine the replica datanodes in t=
he
> pipe ..etc
>
> --
> Best Regards,
> Karim Ahmed Awara
>
> ------------------------------
> This message and its contents, including attachments are intended solely
> for the original recipient. If you are not the intended recipient or have
> received this message in error, please notify me immediately and delete
> this message from your computer system. Any unauthorized use or
> distribution is prohibited. Please consider the environment before printi=
ng
> this email.


--=20
Bing Jiang
Tel=A3=BA(86)134-2619-1361
weibo: http://weibo.com/jiangbinglover
BLOG: www.binospace.com
BLOG: http://blog.sina.com.cn/jiangbinglover
Focus on distributed computing, HDFS/HBase

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<div dir=3D"ltr"><div><div>I think you can try to use jdb, which exists in =
$JAVA_HOME/bin.<br></div><br>Regards<br></div>Bing<br></div><div class=3D"g=
mail_extra"><br><br><div class=3D"gmail_quote">2013/11/4 Karim Awara <span =
dir=3D"ltr">&lt;<a href=3D"mailto:karim.awara@kaust.edu.sa" target=3D"_blan=
k">karim.awara@kaust.edu.sa</a>&gt;</span><br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div><div>Hi,<br><br></div>=
I want to trace the calls that both the DataNode and the NameNode do when I=
 execute a shell command on the hdfs such as (hadoop dfs -put {src} {dst}).=
 Any idea how to do that? <br>


<br><br></div>; tracing including the data node asking the name node for th=
e blockID.. also the class where datanode use to determine the replica data=
nodes in the pipe ..etc<br><div><div><br clear=3D"all"><div><div><div dir=
=3D"ltr">


--<br>Best Regards,<br>Karim Ahmed Awara</div></div>
</div></div></div></div>

<br>
<div><hr></div><font size=3D"1" face=3D"Arial">This message and its content=
s, including attachments are intended solely for the original recipient. If=
 you are not the intended recipient or have received this message in error,=
 please notify me immediately and delete this message from your computer sy=
stem. Any unauthorized use or distribution is prohibited. Please consider t=
he environment before printing this email.</font></blockquote>
</div><br><br clear=3D"all"><br>-- <br><div dir=3D"ltr">Bing Jiang<br>Tel=
=A3=BA(86)134-2619-1361<br>weibo: <a href=3D"http://weibo.com/jiangbinglove=
r" target=3D"_blank">http://weibo.com/jiangbinglover</a><br>BLOG: <a href=
=3D"http://www.binospace.com" target=3D"_blank">www.binospace.com</a> <br>
BLOG: <a href=3D"http://blog.sina.com.cn/jiangbinglover" target=3D"_blank">=
http://blog.sina.com.cn/jiangbinglover</a>&nbsp; <br>Focus on distributed c=
omputing, HDFS/HBase<br></div>
</div>

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