How to suppress line "Connection number: NNN." in Network Server output

[Bryan Pendleton]

I've been running Derby 10.1.1.0 in Network Server mode
using an unmodified version of startNetworkServer.ksh
from the Derby distribution.

I notice that my network server process produces output
of the form:

Connection number: 121538.
Connection number: 121539.
Connection number: 121540.

How do I suppress this output?

thanks,

bryan