Not Able to reschedule apex batch class

Question

enter code hereCurrently I have a batch which I'm scheduling after 2-2 minutes but because it has the same job name it doesn't allow to reschedule. Is there any way to reschedule the same batch. Because when i go to All schedule job in UI I can see it listed with no next schedule run. Now If i give different name it will run but with all the schedule batch listed in All schedule job . Please suggest me how to reschedule the same batch by apex.

String day = string.valueOf(system.now().day());
    String month = string.valueOf(system.now().month());
    String year = string.valueOf(system.now().year());
    String minute = string.valueOf(system.now().minute() + 2);
    String hour = string.valueOf(system.now().hour());
    String nextFireTime = '0 ' + minute + ' ' + hour + ' ' + day + ' ' + month + ' ?' + ' ' + year;
    BatchSample b = new BatchSample(); 
    CronTrigger[] jobList = [SELECT Id, CronJobDetail.Id, CronJobDetail.Name, CronJobDetail.JobType,NextFireTime 
                                  FROM CronTrigger Where CronJobDetail.Name Like 'BatchSample' AND NextFireTime > :System.now()];
    if(jobList.size()==0)
        System.schedule('BatchSample', nextFireTime, b);

Answer 1

While scheduling the Job you can put different name all jobs like append current Datetime:

I have put example for this:

Datetime sysTime = System.now().addSeconds( 120 );

String chronExpression = '' + sysTime.second() + ' ' + sysTime.minute() + ' ' + sysTime.hour() + ' ' + sysTime.day() + ' ' + sysTime.month() + ' ? ' + sysTime.year();

System.schedule( job.getJobName() + sysTime, chronExpression, (System.Schedulable)job );

you can put different name in first parameter of System.schedule