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Posted to mapreduce-user@hadoop.apache.org by "Agarwal, Nikhil" <Ni...@netapp.com> on 2013/02/19 12:23:17 UTC

Which class or method is called first when i run a command in hadoop

Hi All,

Thanks for your answers till now. I was trying to debug Hadoop commands. I just wanted to know that when I run any command say dfs or jar, then which method is called first. If I set a breakpoint then it executes till there but I do not come to know what all methods have been already executed.

Thanks & Regards,
Nikhil

Re: Which class or method is called first when i run a command in hadoop

Posted by Manoj Babu <ma...@gmail.com>.

Hi Nikhil,

Have a look inside the script file named hadoop inside hadoop bin folder.

for example:
C:\cygwin\home\hadoop-0.20.2\bin

sample code:
elif [ "$COMMAND" = "jar" ] ; then
  CLASS=org.apache.hadoop.util.RunJar


Cheers!
Manoj.


On Tue, Feb 19, 2013 at 4:53 PM, Agarwal, Nikhil
<Ni...@netapp.com>wrote:

>  Hi All,****
>
> ** **
>
> Thanks for your answers till now. I was trying to debug Hadoop commands. I
> just wanted to know that when I run any command say dfs or jar, then which
> method is called first. If I set a breakpoint then it executes till there
> but I do not come to know what all methods have been already executed.****
>
> ** **
>
> Thanks & Regards,****
>
> Nikhil****
>

Re: Which class or method is called first when i run a command in hadoop

Posted by Manoj Babu <ma...@gmail.com>.

Hi Nikhil,

Have a look inside the script file named hadoop inside hadoop bin folder.

for example:
C:\cygwin\home\hadoop-0.20.2\bin

sample code:
elif [ "$COMMAND" = "jar" ] ; then
  CLASS=org.apache.hadoop.util.RunJar


Cheers!
Manoj.


On Tue, Feb 19, 2013 at 4:53 PM, Agarwal, Nikhil
<Ni...@netapp.com>wrote:

>  Hi All,****
>
> ** **
>
> Thanks for your answers till now. I was trying to debug Hadoop commands. I
> just wanted to know that when I run any command say dfs or jar, then which
> method is called first. If I set a breakpoint then it executes till there
> but I do not come to know what all methods have been already executed.****
>
> ** **
>
> Thanks & Regards,****
>
> Nikhil****
>

Re: Which class or method is called first when i run a command in hadoop

Posted by Manoj Babu <ma...@gmail.com>.

Hi Nikhil,

Have a look inside the script file named hadoop inside hadoop bin folder.

for example:
C:\cygwin\home\hadoop-0.20.2\bin

sample code:
elif [ "$COMMAND" = "jar" ] ; then
  CLASS=org.apache.hadoop.util.RunJar


Cheers!
Manoj.


On Tue, Feb 19, 2013 at 4:53 PM, Agarwal, Nikhil
<Ni...@netapp.com>wrote:

>  Hi All,****
>
> ** **
>
> Thanks for your answers till now. I was trying to debug Hadoop commands. I
> just wanted to know that when I run any command say dfs or jar, then which
> method is called first. If I set a breakpoint then it executes till there
> but I do not come to know what all methods have been already executed.****
>
> ** **
>
> Thanks & Regards,****
>
> Nikhil****
>

Re: Which class or method is called first when i run a command in hadoop

Posted by Manoj Babu <ma...@gmail.com>.

Hi Nikhil,

Have a look inside the script file named hadoop inside hadoop bin folder.

for example:
C:\cygwin\home\hadoop-0.20.2\bin

sample code:
elif [ "$COMMAND" = "jar" ] ; then
  CLASS=org.apache.hadoop.util.RunJar


Cheers!
Manoj.


On Tue, Feb 19, 2013 at 4:53 PM, Agarwal, Nikhil
<Ni...@netapp.com>wrote:

>  Hi All,****
>
> ** **
>
> Thanks for your answers till now. I was trying to debug Hadoop commands. I
> just wanted to know that when I run any command say dfs or jar, then which
> method is called first. If I set a breakpoint then it executes till there
> but I do not come to know what all methods have been already executed.****
>
> ** **
>
> Thanks & Regards,****
>
> Nikhil****
>