squid hello write test failed

[Tobias Ernst]

Dear All

This is a amd64 box with FreeBSD 6.3. So far it is only acting as a 
firewall (with PF). Yesterday I installed squid via ports with a pretty 
vanilla configuration. I.e. no neighbour caches, just to be used as a 
standalone cache for users from the inside net. No interception caching 
(yet). Squid was not yet put under heavy load - in fact I am so far the 
only person using it.

Everything worked fine yesterday. However, squid "died" after
"squid -k rotate" was executed by cron over night. Here is what it came 
up with after (successful) log rotation:

2008/04/23 04:20:00| storeDirWriteCleanLogs: Starting...
2008/04/23 04:20:00|   Finished.  Wrote 1706 entries.
2008/04/23 04:20:00|   Took 0.0 seconds (1714572.9 entries/sec).
2008/04/23 04:20:00| aioSync: flushing pending I/O operations
2008/04/23 04:20:00| aioSync: done
2008/04/23 04:20:00| logfileRotate: /usr/local/squid/logs/access.log
2008/04/23 04:20:00| sendto FD 12: (1) Operation not permitted
2008/04/23 04:20:00| ipcCreate: CHILD: hello write test failed

Squid was running and accepting connections on port 3128, but they were 
not carried out any longer.

I then killed squid (actually I needed kill -9 to bring it down) and 
made sure no more squid processes are running. But now, every time I try 
to start squid - manually, or via rc.d - I get the same messages as 
above. The "FD" number varies, but everything else stays the same.

There were no other changes made on the machine in between that I am 
aware of.

What is going on here?

Regards
Tobias

FWIW, here is my config:

cache_log /usr/local/squid/logs/cache.log
cache_access_log /usr/local/squid/logs/access.log
cache_store_log none
connect_timeout 2 minutes
log_fqdn on
cache_effective_user squid
http_port 3128

acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443
acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
acl Safe_ports port 70          # gopher
acl Safe_ports port 210         # wais
acl Safe_ports port 1025-65535  # unregistered ports
acl Safe_ports port 280         # http-mgmt
acl Safe_ports port 488         # gss-http
acl Safe_ports port 591         # filemaker
acl Safe_ports port 777         # multiling http
acl CONNECT method CONNECT

http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access deny to_localhost

acl inside_net src xxx.xxx.xxx.0/24

http_access allow inside_net
http_access allow localhost
http_access deny all

cache_mgr xxx at xxx.de

maximum_object_size 32 MB

cache_replacement_policy heap LFUDA
cache_dir aufs /usr/local/squid/cache 32768 32 256