Traceback of a detached process

[Elli M Barasch]

How can I get a traceback of a crashing detached subprocess? It is launched via SYS$CREPRC from a detached process that launched via LOGINOUT (i.e. it has a CLI).

[RBrown_1]

Assuming you built the crashing image with traceback, I would have thought that the traceback would have appeared in the subprocess's SYS$ERROR. If you did not specify the ERROR parameter in your call to $CREPRC, then perhaps it goes to SYS$OUTPUT of the parent process.

But just a wild guess.

[Elli M Barasch]

The parent's sys$output and sys$error files don't contain any traces.

While the subprocess is running, it holds a file open called [defaultdir].;N But at rundown, the file seems to disappear.

VMS 7.3-2 Alpha, btw.

[Elli M Barasch]

And yes, it is not built with /NOTRACEBACK. (Default /TRACEBACK is implied.)

[John Gillings]

Elli,

Sounds suspiciously like the process hasn't been given sufficient quotas to send the output to a file. What does your PQL look like? Note this is a very tricky parameter to get right, and often critically important.

Maybe it would be best to post your whole $CREPRC call for the parent, and the code which starts the subprocess.

At the very least you should have the final status in the accounting log.

[Ian Miller.]

You may also wish to enable process dump for that process

[Elli M Barasch]

One interesting error shows up in the SYS$OUTPUT file:

Error activating command interpreter SYS$SYTEM:DCL
Process quota exceeded

Now to figure out which PQL?

[Elli M Barasch]

I've turned on SET PROC/DUMP for all subprocesses and await their expected demises. All our processes declare exit handlers. However, the exit handlers do not resignal. Does that mean the dumps will not report a traceback?

[Andy Bustamante]

Another option is to use Availability Manager to monitor quotas and focus in on which quota is the issue.

Availability Manager also allows for on the fly changes to quotas.

[Ian Miller.]

Availability Manager is a good tool for looking at process quota issues.

Do you specify quotas in the $CREPRC or use the default values from the PQL_ parameters?