[squid-users] Server reboots often

I don't know whether this error in my cache.log is part of my OpenBSD
3.1 running Squid 2.4 Stable 7 reboots every 24 hours. Those errors
keep repeating every 10-20 seconds. Server has 784 MB RAM and 4 SCSI
HDD, serving 600 concurrent connections.

# ulimit -aH
time(cpu-seconds) unlimited
file(blocks) unlimited
coredump(blocks) unlimited
data(kbytes) 1048576
stack(kbytes) 8192
lockedmem(kbytes) 564880
memory(kbytes) 564880
nofiles(descriptors) 16384
processes 1044

2002/12/15 12:37:55| comm_accept: FD 15: (53) Software caused
connection abort
2002/12/15 12:37:55| httpAccept: FD 15: accept failure: (53) Software
caused connection abort
2002/12/15 12:40:13| parseHttpRequest: Requestheader contains NULL
characters
2002/12/15 12:40:13| clientReadRequest: FD 39 Invalid Request
2002/12/15 12:40:13| clientSendMoreData: Deferring error:invalid-request
2002/12/15 12:50:37| parseHttpRequest: Unsupported method 'ICSP/1.2'
2002/12/15 12:50:37| clientReadRequest: FD 173 Invalid Request
2002/12/15 12:55:31| parseHttpRequest: Unsupported method 'GNUTELLA'
2002/12/15 12:55:31| clientReadRequest: FD 261 Invalid Request
2002/12/15 13:36:14| parseHttpRequest: Unsupported method 'GNUTELLA'
2002/12/15 13:36:14| clientReadRequest: FD 248 Invalid Request
2002/12/15 13:50:55| parseHttpRequest: Unsupported method 'ICSP/1.2'
2002/12/15 13:50:55| clientReadRequest: FD 201 Invalid Request
2002/12/15 13:52:10| parseHttpRequest: Requestheader contains NULL
characters
2002/12/15 13:52:10| clientReadRequest: FD 102 Invalid Request
2002/12/15 13:52:10| clientSendMoreData: Deferring error:invalid-request
2002/12/15 14:03:13| parseHttpRequest: Unsupported method 'GNUTELLA'
2002/12/15 14:03:13| clientReadRequest: FD 47 Invalid Request
2002/12/15 14:32:22| Starting Squid Cache version 2.4.STABLE7 for
sparc64-unknown-openbsd3.1...
2002/12/15 14:32:22| Process ID 27438
2002/12/15 14:32:22| With 3404 file descriptors available
2002/12/15 14:32:22| Performing DNS Tests...
2002/12/15 14:32:22| Successful DNS name lookup tests...
2002/12/15 14:32:22| DNS Socket created on FD 5
  
Received on Sun Dec 15 2002 - 12:59:19 MST