Hadoop, mail # user - Re: how to get each task's process

how to get each task's process

朱韬 2011-03-29, 14:56

hi,guys:
   I want to monitor each tasks' io usage, do can I get each task's process id?
   I used jvmManager.getPid(tip.getTaskRunner()); but it didn't seem to be the task's process.
   Thanks
   zhutao

Re: how to get each task's process

Nan Zhu 2011-03-29, 15:05

TaskStatus.getprogress() is helpful

Best,
Nan

2011/3/29 朱韬 <[EMAIL PROTECTED]>

> hi,guys:
> I want to monitor each tasks' io usage, do can I get each task's
> process id?
> I used jvmManager.getPid(tip.getTaskRunner()); but it didn't seem to
> be the task's process.
> Thanks
>
> zhutao
--
Nan Zhu
School of Software,5501
Shanghai Jiao Tong University
800,Dongchuan Road,Shanghai,China
E-Mail: [EMAIL PROTECTED]

Re:Re: how to get each task's process

朱韬 2011-03-29, 15:19

Nan:
Thanks, I mean process, not progress
在 2011-03-29 23:05:29，"Nan Zhu" <[EMAIL PROTECTED]> 写道：

>TaskStatus.getprogress() is helpful
>
>Best,
>Nan
>
>2011/3/29 朱韬 <[EMAIL PROTECTED]>
>
>> hi,guys:
>> I want to monitor each tasks' io usage, do can I get each task's
>> process id?
>> I used jvmManager.getPid(tip.getTaskRunner()); but it didn't seem to
>> be the task's process.
>> Thanks
>>
>> zhutao
>
>
>
>
>--
>Nan Zhu
>School of Software,5501
>Shanghai Jiao Tong University
>800,Dongchuan Road,Shanghai,China
>E-Mail: [EMAIL PROTECTED]

Re: Re: how to get each task's process

Nan Zhu 2011-03-29, 15:55

Oh, I missed that..shy.....

TaskRunner is extended from thread, I think
Thread.currendThread().getName() may be the answer

But I have a impression on that the java api cannot give the real thread id
since java doesn't allow user to manage the thread, I mean that you can only
get a id of java object instead of the id in OS....

Best,

Nan
2011/3/29 朱韬 <[EMAIL PROTECTED]>

> Nan:
> Thanks, I mean process, not progress
>
>
>
>
> 在 2011-03-29 23:05:29，"Nan Zhu" <[EMAIL PROTECTED]> 写道：
>
> >TaskStatus.getprogress() is helpful
> >
> >Best,
> >Nan
> >
> >2011/3/29 朱韬 <[EMAIL PROTECTED]>
> >
> >> hi,guys:
> >> I want to monitor each tasks' io usage, do can I get each task's
> >> process id?
> >> I used jvmManager.getPid(tip.getTaskRunner()); but it didn't seem
> to
> >> be the task's process.
> >> Thanks
> >>
> >> zhutao
> >
> >
> >
> >
> >--
> >Nan Zhu
> >School of Software,5501
> >Shanghai Jiao Tong University
> >800,Dongchuan Road,Shanghai,China
> >E-Mail: [EMAIL PROTECTED]
>

--
Nan Zhu
School of Software,5501
Shanghai Jiao Tong University
800,Dongchuan Road,Shanghai,China
E-Mail: [EMAIL PROTECTED]

Re: how to get each task's process

Harsh J 2011-03-29, 17:17

I think jvmManager.getPid(...) is correct. It should give you the
launched JVM's PID properly. In fact, the same is even used to kill
the JVMs.

2011/3/29 朱韬 <[EMAIL PROTECTED]>:
> hi,guys:
> I want to monitor each tasks' io usage, do can I get each task's process id?
> I used jvmManager.getPid(tip.getTaskRunner()); but it didn't seem to be the task's process.
> Thanks
> zhutao

--
Harsh J
http://harshj.com

Re:Re: how to get each task's process

朱韬 2011-03-30, 13:45

Harsh:
   I found that jvmManager.getPid(...) returned the pid of MapTaskRunner, but I want to get the task's pid. For example, I ran the the example randomwrite, the pid of task which is writing is 8268, but jvmManager.getPid(...) seemed to be its parent pid. I can not figure out the relationship between the taskrunner and the real task.
   Thanks
   zhutao

At 2011-03-30 01:17:30，"Harsh J" <[EMAIL PROTECTED]> wrote:

>I think jvmManager.getPid(...) is correct. It should give you the
>launched JVM's PID properly. In fact, the same is even used to kill
>the JVMs.
>
>2011/3/29 朱韬 <[EMAIL PROTECTED]>:
>> hi,guys:
>> I want to monitor each tasks' io usage, do can I get each task's process id?
>> I used jvmManager.getPid(tip.getTaskRunner()); but it didn't seem to be the task's process.
>> Thanks
>> zhutao
>
>
>
>--
>Harsh J
>http://harshj.com