Unable to forward this request at this time

Hi,

I'm running Squid 2.1.PATCH2 on Linux 2.0.35. I have only one parent peer defined as

        cache_peer proxy.xxx.xxx.de parent 81 3130

After a short while most requests run into the following message:

    Unable to forward this request at this time.
    This request could not be forwarded to the origin server or to
    any parent caches. The most likely cause for this error is that:

    The cache administrator does not allow this cache to make direct
    connections to origin servers, and
    All configured parent caches are currently unreachable.

cachemgr.cgi (when asked for Peer Cache Statistics) shows:

        Parent : proxy.xxx.xxx.de/81/3130
        Flags :
        Address[0] : xxx.xxx.xxx.xxx
        Status : Down
        AVG RTT : 0 msec
        LAST QUERY : 5 seconds ago
        LAST REPLY : 45 seconds ago
        PINGS SENT : 91
        PINGS ACKED: 0 0%
        FETCHES : 80 0%
        IGNORED : 0 0%
        Histogram of PINGS ACKED:
        keep-alive ratio: 0%

Initially I had not configured icp_query_timeout. Setting this to 10000 made the
situation somewhat better, but after a while the error messages came back.

The quick&dirty solution for me was to set

        cache_peer proxy.xxx.xxx.de parent 81 7

imitating a non-ICP neighbor. Im quite sure it is an ICP neighbor (its a Netscape Proxy):
Requests are running good for a while with ICP port 3130 until - after some minutes - the
described problem comes up.

What can I do to analyze the problem? Or should I configure something else?

Thanks in advance!

Hasta la vista,
               Robert
Received on Thu Dec 10 1998 - 14:49:22 MST