Experimental Physics and
Industrial Control System

Pilar Gil Jaldo <[email protected]> · Wed, 5 Sep 2018 15:36:01 +0200

Hello everybody,

I have a question regarding the reasons why a scan thread can be

suspended. I have a running IOC and at a certain moment the IOC breaks

with following message:

epicsStrDup: mallocMustSucceed(1) - malloc failed
Thread scan2 (0x9c2b038) suspending.

I have found in the tech-talk messages following reason which seems to

be the same problem that mine.

https://epics.anl.gov/tech-talk/2013/msg00154.php

The IOC is on a network where many devices are sending packages to the

CA network, but nobody is answering because other devices are switched

off (the traffic in the CA is very high).

Is it possible that the segmentation fault is caused by a network

congestion? Can the scan thread be suspended by a higher network traffic?

Thank you very much in advance for your answers.
Pilar Gil Jaldo

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System