You have not provided any information regarding your environment, nor have you provided the code of the scripts involved, nor the code that launches the scripts (a crontab, I presume). Although, even if you had, intermittent failures can be difficult to debug without access to the machine(s) in question.
Generally, speaking:
1. You could grep the source to your shell for all instances of 'cannot execute' and see what can trigger that error message.
2. You can modify the way the scripts are launched to enable tracing, and log the trace to a file by redirecting standard error.
3. If the filesystem on which the scripts reside is remote, perhaps you are experiencing intermittent failures on the network/fileserver.
And state the unix usernames (with group names) of the users which will execute this script.
Is there any simple pattern for the failure?
Is cron involved or are the background tasks invoked by some other method?
If it is a cron, please post the name of the user owning the cron and the whole line from crontab.
Fundamentals:
What Operating System are you running?
Do you have any diagnostic tools such as "sar"?
I strongly suspect that you are blowing a kernel parameter such as the maximum number of processes for one user.
I have used shc utillity to convert a shell script to it's compiled version.Inside this script i have called another shell script which is also in compled version.
Example:-
Main script:- main.sh.x
child script:- child.sh.x (this is called inside main.sh.x)
This child script will run in... (2 Replies)
Hi All,
Can someone help me in knowing the exact difference between nohup and &.
The definition is quite clear but i only want to know if i run my job using & and in between i hung up my terminal. (10 Replies)
Reposting, as it got lost during the database backup. :(
Via a shell script a spawn 3 background jobs namely a, b & c.
These will take different times to complete.
I want to print a different message on completion of each.
How can i find out when each one has completed independently.
... (19 Replies)
i need to execute 5 jobs at a time in background and need to get the exit status of all the jobs i wrote small script below , i'm not sure this is right way to do it.any ideas please help.
$cat run_job.ksh
#!/usr/bin/ksh
####################################
typeset -u SCHEMA_NAME=$1
... (1 Reply)
I have the following sample script to run a script the jobs with the same
priority(in this case field3) in parallel; wait for the jobs to finish
and run the next set of jobs in parallel.When all the lines are read
exit the script.
I have the following script which is doing evrything I want... (1 Reply)
Hi there,
I'm quite new to UNIX for programming. I have a script that does this:
Shows on screen real-time results taken from phone calls and logs them in a file.
However, when I start my script, I want my script to start logging in the file in the background, so I can continue working on... (1 Reply)
Ok, so I'm comfortable backgrounding jobs in the shell, starting and stopping them, and bringing them to the fg and bg. What I can't figure out is how to monitor those background jobs from another shell (remote, or local).
Example:
- On a local console for MYHOST, I su to root
- I then update... (3 Replies)
Hi,
i have a problem with turning a job into backgrund.
When i enter this at the shell:
spice -b darlington.cir -r output.raw > screenout.tmp &
and then let me show the currently running jobs, i get the following output:
+ Suspended (tty output) spice -b darlington.cir -r output.raw >... (4 Replies)
