Cron ta not working

[Namrta Pandey]

Hi,

I have scheduled some batches in solaris server cron tab, which is my db server. The probem is, that sometimes the batch runs but sometimes the same batch does not picked by cron to run.

Can anybody tell me what can be the reason for this?

Thanks in Advance.
Namrta

[Harlin Seritt]

If you can post a copy of the cronjob entry and some code, I'll be happy to help you out.

[Namrta Pandey]

command which I have fired to schedule the batch is :

5,10,15,20,25,30,35,40,45,50,55 * * * * /ActDeact/Cron/Shell_script/PreActDeact.sh

[Namrta Pandey]

Hi All,

I have scheduled my batch in cron via java code which is as follows:

Process GETB=null;
try
{
GETB = Runtime.getRuntime().exec("sh /export/Cron/Shell_script/PRC_Cron.sh");
GETB.waitFor(); 
} 
catch(IOException ex)
{
System.out.println("Exception "+ex.toString());
}

But my cron is not picking up the process to execute. Scheduling of batch is done in the same way as mentioned in trial messages.

Also let me know if there is any way to capture the process in shell script also.

Thanks in Advance
Namrta.

[James Sabre]

What am I missing? Where is 'cron' involved in the Java code? Are you saying you are running the Java as the cron job via a script and that this then uses Runtime.exec() to invoke another script? What does the cron email show when the process does execute and those times when the cron job does not execute?

Note1 - your cron job will not execute on the hour since 0 is not in the set of times.
Note2 - your use of Runtime.exec() is flawed. You need to read the 4 sections of http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html and implement ALL the recommendations. Failure to do so will just cause you more grief.