BroPing Connection Failure

Sounds like a nasty race condition of some sort. The remote.log only
shows that something weird is going on but isn't detailed enough to
understand what's causing it. Please enable debugging output on both
sides. For Broccoli, see here:
http://www.icir.org/christian/broccoli/manual/c84.html#AEN814

For Bro, configure with --enable-debug and then run with "-B comm".
That should produce a debug.log with lots of information.

It would also be good if you could try it with the current
development version from SVN to see if the problem still occurs with
that one.

Robin