Hi Raakhi,
You can't suspend MapReduce jobs in Hadoop, which is why the
JobControl API doesn't support job suspension, only the ability to
kill jobs.
Cheers,
Tom
On Mon, Jul 20, 2009 at 9:39 AM, Rakhi Khatwani<rakhi.khatw...@gmail.com> wrote:
> Hi,
> I have a scenario in which i have a list of 5 jobs. and an event
> handler for example when triggered, would suspend all the running jobs.
>
> but when i use a job control object, jobControl and execute,
> jobControl.suspend(), it seems tht only the jobControl gets suspended and
> not the 5 jobs which i wanted.
>
>
> is there any way you can suspend the job in the java program???
>
>
> Regards,
> Raakhi
>
> On Fri, Jul 17, 2009 at 2:48 PM, Tom White <t...@cloudera.com> wrote:
>
>> Hi Raakhi,
>>
>> JobControl is designed to be run from a new thread:
>>
>> Thread t = new Thread(jobControl);
>> t.start();
>>
>> Then you can run a loop to poll for job completion and print out status:
>>
>> String oldStatus = null;
>> while (!jobControl.allFinished()) {
>> String status = getStatusString(jobControl);
>> if (!status.equals(oldStatus)) {
>> System.out.println(status);
>> oldStatus = status;
>> }
>> try {
>> Thread.sleep(1000);
>> } catch (InterruptedException e) {
>> // ignore
>> }
>> }
>>
>> Hope this helps.
>>
>> Tom
>>
>> On Fri, Jul 17, 2009 at 9:10 AM, Rakhi Khatwani<rakhi.khatw...@gmail.com>
>> wrote:
>> > Hi,
>> > I was trying out a map-reduce example using JobControl.
>> > i create a jobConf conf1 object, add the necessary information
>> > then i create a job object
>> > Job job1 = new Job(conf1);
>> >
>> > n thn i delare JobControl object as follows:
>> > JobControl jobControl = new JobControl("JobControl1");
>> > jobControl.addJob(job1);
>> > jobControl.run();
>> >
>> >
>> >
>> > whn i execute it in the console,
>> > i get the following output
>> > 09/07/17 13:10:16 WARN mapred.JobClient: Use GenericOptionsParser for
>> > parsing the arguments. Applications should implement Tool for the same.
>> > 09/07/17 13:10:16 INFO mapred.FileInputFormat: Total input paths to
>> process
>> > : 4
>> >
>> >
>> >
>> >
>> > n there is no other output.
>> > but from the UI i can c that the job has been executed.
>> > if there any way i can direct the output to the console.
>> > or is there any way in which while the job is runing, i can continue
>> > processing from main. (i wanna try suspending/stopping jobs etc).
>> >
>> > Regards,
>> > Raakhi
>> >
>>
>
