I have an interesting issue that only occurs sometimes.  We have a DJ that goes live and most of the time works without a hiccup.  On some occasions however, her stream will abruptly disconnect and AutoDJ will take over.  Looking at the logs I'm seeing a couple errors which you can see in the attached picture.  Any ideas on this?

OK, I have a few questions which should help me identify the issue/s
Device the host is using to connect to the stream server?
OS of device
Connection type WIFI, Cable, DSL same network
program host is using to connect to CCast(MIXXX, SAMS, other)
icecast or shoutcast

my first guess would be the internet connection the host is using

I have an interesting issue that only occurs sometimes.  We have a DJ that goes live and most of the time works without a hiccup.  On some occasions however, her stream will abruptly disconnect and AutoDJ will take over.  Looking at the logs I'm seeing a couple errors which you can see in the attached picture.  Any ideas on this?

Your client is using liquidsoap. Put an silent music file in deck b of the broadcaster and the error is solved.
It happens when your client is sending and doing an break for a few seconds. The system is taking over the stream and give this error message you posted to you.