A misconfigured CTCE causes Hercules to crash

[jeff-snyder]

A misconfigured CTCE causes Hercules to crash

[Peter-J-Jansen]

Hi Jeff,

The CTCE recovery attempts are known to not always end successfully. The DEVINIT 0:0610 attempt may very well fail when the device by then is busy or has an interrupt pending. That in this case it caused a crash was probably due to the Hercules watchdog timer discovering HHC00822S PROCESSOR CP00 APPEARS TO BE HUNG!. So this crash was probably a case of Works As Desgined ("WAD").

Some years ago numerous efforts were spent on making the CTCE automatic recovery's fail-safe, and progress was made, but no, I was unable to make it work in all cases. As this occurrence was started by an incorrect CTCE configuration, I'd suggest we close this Issue. As some additional help avoiding CTCE configuration errors, I'd suggest to not specify any port numbers at all when the CTCE links are between difference hosts, but just restrict the configuration to just use device (CCUU) numbers, e.g.:

0610 CTCE =Hercules

or if one prefers the device number host-side specific:

0610 CTCE 0601=js01.hostname

0601 CTCE 0610=js10.hostname

Cheers,

Peter

[jeff-snyder]

Peter,

Some years ago numerous efforts were spent on making the CTCE automatic recovery's fail-safe, and progress was made, but no, I was unable to make it work in all cases. As this occurrence was started by an incorrect CTCE configuration, I'd suggest we close this Issue.

I'm good with that. I have a work around (i.e. fix your stupid configuration error!).

As some additional help avoiding CTCE configuration errors, I'd suggest to not specify any port numbers at all when the CTCE links are between difference hosts, but just restrict the configuration to just use device (CCUU) numbers, e.g.:

Unfortunately, this doesn't work for me because I run multiple Hercules images on each host and I move them around, so I'm never sure which images will be running on which hosts. It's a good solution for people with fewer images or a more stable environment, theough!

Thanks,
Jeff