Containing a faulty stimulus in a content delivery network
Examples described herein relate to systems and methods for containing a faulty stimulus. A computer-implemented method may include listing in a suspect list every received stimulus including the faulty stimulus, and implicitly testing the stimuli by respectively acting upon those stimuli by a software application. Responsive to successfully acting upon each of the stimuli besides the faulty stimulus, each non-faulty stimulus is deleted from the suspect list and, responsive to such deletion, made available to a downstream node. Responsive to acting upon the faulty stimulus, the software application crashes which leaves the faulty stimulus listed in the suspect list. The software application then restarts and deems the faulty stimulus as being faulty based upon the faulty stimulus still being listed in the suspect list after the restart.
1. A computer-implemented method for containing a faulty stimulus, the method comprising:
adding to a suspect list every stimulus in a received plurality of stimuli including non-faulty stimuli and the faulty stimulus;
implicitly testing the stimuli by respectively acting upon those stimuli by a software application;
responsive to successfully acting upon each of the non-faulty stimuli by the software application:
deleting that non-faulty stimulus from the suspect list; and
responsive to the deleting, making that non-faulty stimulus available to a downstream node; and
responsive to a crash of the software application caused by acting upon the faulty stimulus, wherein the crash results in the software application no longer working normally:
restarting the software application subsequent to the crashing; and
deeming the faulty stimulus as being faulty based upon it still being listed in the suspect list after the restarting
wherein the computer does not act again upon the faulty stimulus based upon the faulty stimulus being deemed faulty.
2. The method of claim 1 , further comprising reporting the deemed faulty stimulus to an upstream computer.
3. The method of claim 1 , wherein the computer makes the faulty stimulus unavailable to the downstream node based upon the faulty stimulus being deemed faulty.
4. The method of claim 1 , wherein the crash also leaves a non-faulty stimulus listed in the suspect list, and wherein that non-faulty stimulus is deemed as being faulty based upon it still being in listed in the suspect list after the restarting.
5. The method of claim 1 , wherein stimuli of the plurality of stimuli independently include commands for the downstream node to take an action or to change configuration.
6. The method of claim 1 , wherein the storage device comprises a mass storage device.
7. A computer system comprising a processor, a storage device, and a network interface, the processor being configured to implement operations comprising:
adding to a suspect list stored in the storage device, by the processor, every stimulus in a received plurality of stimuli including non-faulty stimuli and the faulty stimulus;
implicitly testing, by a software application running on the processor, the stimuli by respectively acting upon those stimuli;
responsive to successfully acting upon each of the non-faulty stimuli:
deleting, by the processor, that non-faulty stimulus from the suspect list; and
responsive to the deleting, making available, by the processor via the network interface, that non-faulty stimulus to a downstream node; and
responsive to a crash of the software application caused by acting upon the faulty stimulus, wherein the crash results in the software application no longer working normally:
restarting the software application subsequent to the crashing; and
deeming, by the processor, the faulty stimulus as being faulty based upon it still being listed in the suspect list after the restarting,
wherein the processor further is configured not to act again upon the faulty stimulus based upon the faulty stimulus being deemed faulty.
8. The computer system of claim 7 , wherein the processor further is configured to report the deemed faulty stimulus to an upstream computer.
9. The computer system of claim 7 , wherein the processor further is configured to make the faulty stimulus unavailable to the downstream node based upon the faulty stimulus being deemed faulty.
10. The computer system of claim 7 , wherein the crashing also leaves a non-faulty stimulus listed in the suspect list, and wherein the processor further is configured to deem that non-faulty stimulus as being faulty based upon it still being in listed in the suspect list after the restarting.
11. The computer system of claim 7 , wherein stimuli of the plurality of stimuli independently include commands for a downstream node to take an action or to change configuration.
12. The computer system of claim 7 , wherein the storage device comprises a mass storage device.