My name is Robert and I am network engineer for the Cisco SBSC. This is the correct place for the ESW500 series.
From the error messages you are seeing, I would recommend to disable the Bonjour service to see if that helps with the reboots. I am currently looking into the error messages you are getting to see if there is a solution. I would recommend giving us a call as well for immediate assistance on the error messages. Below is a link for our support center numbers.
I am sorry to hear that it did not help. I did find a few cases with the matching error message. The solution on these cases was to update to the latest firmware release. From the look of your error messages, it appears the switches are on the latest (2.1.19).
You can certainly confirm this and even reflash the latest firmware, but if that does not solve the problem, I would suggest you call us to open a case.
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