Connection Lifetime Expired

Hi all,

Some of my user usually get "Connection Lifetime Expired" when they access
the web through our squid in transparent proxy mode (via cisco router). I
had increase debug level and found a lot of logs like:

1998/05/26 14:10:49| clientReadRequest: FD 71: no data to process ((11) Resource temporarily unavaila ble)
1998/05/26 14:10:49| clientReadRequest: FD 237: no data to process ((11) Resource temporarily unavail able)
1998/05/26 14:10:52| clientReadRequest: FD 186: no data to process ((11) Resource temporarily unavail able)
...
...
1998/05/26 14:11:04| requestTimeout: FD 71: lifetime is expired.
1998/05/26 14:11:04| requestTimeout: FD 237: lifetime is expired.
1998/05/26 14:11:07| requestTimeout: FD 186: lifetime is expired.

the time diff between each pair of FDs is always 15 seconds.

Do you have some suggestion to investigate more?

The system is:

PentiumII 300
256MB Ram
3 UW SCSI controller
5 UW SCSI harddisk (total 18GB [4x4 + 2])
Linux 2.0.34pre12 + 3000fd patch
Squid 1.2b20 + first patch set

This server load is ~35 connection/sec average and peak at ~70
connection/sec (according to cachemgr.cgi).

I didn't try 1.2b21 yet.

--
aet