Per WP 12570 we stopped the cameras on h1digivdeo[45] and updated the pylon and pylon-camera-server software.  This was to bring in a fix in the pylon library for leaked file descriptors when a camera dropped and reconnected.

Last week we just restarted the software to close all the leaked file descriptors.  This should solve the problem.  This was not a feature update of the camera software, just a rebuild against a newer pylon library.

This was done 8:50-9:00am local time (16:00 UTC).

The procedure was to:

1. run apt-get update

2. stop all the camera processes via the management web page

3. run apt-get install pylon pylon-camera-server

4. restart all the camera processes via the management web page

5. spot check a few cameras to make sure things come back.