From owner-freebsd-hackers  Wed Mar 26 17:32:01 1997
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Date: Wed, 26 Mar 1997 17:31:57 -0800
To: freebsd-hackers@freebsd.org
From: Peter Haight <peterh@prognet.com>
Subject: ENOBUFS on heavy udp sending
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When sending a bunch of udp packets (about 1600 a second) I start to get
ENOBUFS on the sendto's near the end of a block of about 200 sends in a
fairly tight loop. (There are also about 200 TCP connections established,
but with no activity during this.) The kernel is 2.2-BETA and it has
NMBCLUSTERS=20480 and MAXMEM=98304. 

One of the times after this happend I did a 'netstat -a' and there are
about 200 alive UDP connections after I killed my program. They all look
like this:
Proto 	Recv-Q	Send-Q	Local	Foreign
udp	0 	0	*.*	*.* 

Any ideas about what is going on and how I can fix it?