Question

Check for running SQL job before starting new job

Asked by: nummagumma2

I have a SQL job that can take a variable length of time to run.  I have another job that runs on a closer schedule.  If the second job starts while the first is running, it will fail.   I'd like to have the second job check for the first job running, and then either WAIT or not run at all.

Ideas?

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Asked On
2009-01-26 at 14:46:04ID24085261
Topics

MS SQL Server

,

SQL Query Syntax

Participating Experts
4
Points
500
Comments
7

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Answers

 

by: BrandonGalderisiPosted on 2009-01-26 at 14:47:49ID: 23472025

Why not add the steps from Job 2 to Job 1?

 

by: tigin44Posted on 2009-01-26 at 14:50:59ID: 23472052

the convenient solution has offered by BrandonGalde. Use it..

 

by: nummagumma2Posted on 2009-01-26 at 17:41:29ID: 23473081

Sorry folks - my question wasn't clear enough.

Job1 runs once a day and can take 30 minutes to 3 hours.
Job 2 runs every 2 hours and can take 5 minutes to 30 minutes.

If they collide, there's a problem.  They both need to run independently of each other.

I'd like to have Job2 check to see if Job1 is running, and if so, then WAIT and/or fail that specific instance.  I hope that clears up what I'm trying to achieve

 

by: dbbishopPosted on 2009-01-26 at 21:06:38ID: 23473862

In job 2, add an initial step with the following code (this assumes job1 has 3 steps. Change the 3 to the last job step that runs in the job):

Create a schedule in JOB2 called Main. Set it to run once with any date/time you want and disable it.

This code will pull the last run date (assuming time is irrelevant) and compare it with the current date. If the job has not yet run (or is running and has not completed), the date will be the previous run date. If that is the case, the schedule MAIN will be set to run in 15 minutes, will be enabled and the step will fail. Thus, the job will be run again in 15 minutes and will continue until JOB1 has run.

DECLARE @LastDate SMALLDATETIME
DECLARE @New_Sched DATETIME
DECLARE @Sch_Date VARCHAR(8)
DECLARE @Sch_Time VARCHAR(8)
 
SELECT     @LastDate = sysjobsteps.last_run_date
FROM       sysjobs INNER JOIN
           sysjobsteps ON sysjobs.job_id = sysjobsteps.job_id
WHERE      (sysjobs.name = N'JOB1') 
AND        (sysjobsteps.last_run_outcome = 1) 
AND        (sysjobsteps.step_id = 3)
 
IF CAST(CONVERT(CHAR(8), GETDATE(), 112) > @LastDate
    BEGIN
        SET @New_Sched = DATEADD(mi,15, GETDATE())	
        SET @Sch_Date = CONVERT(CHAR(8), @New_Sched, 112)
        SET @Sch_Time = REPLACE(CONVERT(VARCHAR(8), @New_Sched, 108), ':', '')
		
        EXEC msdb.dbo.sp_update_jobschedule @job_name = 'JOB2', @name = 'Main',
            @enabled = 1, @freq_type = 1, @freq_interval = 1, @freq_subday_type = 1,
            @active_start_date = @Sch_Date,
            @active_start_time = @Sch_Time 
 
            RAISERROR('Rescheduling the job', 16, 1)
    END

                                              
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by: ScottPletcherPosted on 2009-01-27 at 11:23:58ID: 23480014

Adjust the code below as needed -- chg job name and amount of time to delay -- and make if the first step in job2.

DECLARE @jobname sysname
SET @jobname = N'Job2'
 
WHILE 1 = 1
BEGIN
    --If @jobname is not currently running ...
    IF NOT EXISTS(
        SELECT 1
        FROM msdb.dbo.sysjobs sjob WITH (NOLOCK)
        INNER JOIN (
            SELECT SUBSTRING(program_name, CHARINDEX('Job 0x', program_name) + 6, 32) AS jobid
            FROM master.dbo.sysprocesses WITH (NOLOCK)
            WHERE program_name like 'SQLAgent%Job 0x%'
        ) AS sprc ON CAST(sjob.job_id AS VARCHAR(40)) = 
            SUBSTRING(sprc.jobid, 07, 2) + SUBSTRING(sprc.jobid, 05, 2) +
            SUBSTRING(sprc.jobid, 03, 2) + SUBSTRING(sprc.jobid, 01, 2) + '-' +
            SUBSTRING(sprc.jobid, 11, 2) + SUBSTRING(sprc.jobid, 09, 2) + '-' +
            SUBSTRING(sprc.jobid, 15, 2) + SUBSTRING(sprc.jobid, 13, 2) + '-' +
            SUBSTRING(sprc.jobid, 17, 4) + '-' + SUBSTRING(sprc.jobid, 21, 12)
        WHERE sjob.name = @jobname
    )
        --...exit this loop and continue running current job as normal
        BREAK
    --@jobname is running, so delay going to next step of current job
    WAITFOR DELAY '000:05:00' --wait 05 minutes before checking again
END --WHILE
                                              
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