Error written to System Log after clearing log

[rebytr]

Not a big deal, but just curious.  Each time the system log is cleared, there's a nginx error added to the system log like below:

nginx: 2016/06/10 20:46:39 [error] 30871#0: send() failed (54: Connection reset by peer)

Other than the error message that gets written, I can't see any other problems.  Was just curious if this is a known issue, or if something was going on with my setup.  I'm running 2.3.1-RELEASE-p1.