[squid-users] Failed to select source for 'http Question

Hi there,
I do not know much about squid, so please be patient with me ..

I have a (Zope based) CMS for which I want to provide a squid accelerator.

The squid config file is generated by an utility. You find it attached.
To test it I generated an entry in the hosts file:
127.0.0.1 testiste.zehndercom.org

when I try to access the testsite running at port 8080 directly things
work fine.
However When I access it trough squid I get an error:
While trying to retrieve the URL:
http://127.0.0.1:8080/VirtualHostBase/http/testsite.zehndergroup.com:80/zehnderi/zehnderi/VirtualHostRoot/front-page

The following error was encountered:

    * Unable to forward this request at this time.

I d add an excerpt from the cache.log .

what could created this error
what need I to do to avoid it.

thanks in advance
robert

here the squid.conf.
--------------------

# This configuration file requires squid 2.6+. It is untested with
squid 3.x.

# BASIC CONFIGURATION
#
------------------------------------------------------------------------------
visible_hostname testsite.zehndergroup.com

# port on which to listen
http_port 80 vhost defaultsite=testsite.zehndergroup.com

# set cache directory and size (1000 MB) - be sure to set the cache size to
# about 10% less than the physical space available to leave room for squid's
# swap files and other temp files
cache_dir ufs /var/spool/squid 1000 16 256
cache_mgr robert@redcor.ch

# LOGS
#
------------------------------------------------------------------------------
# cache_access_log /var/log/squid/access.log
# cache_log /var/log/squid/cache.log
# cache_store_log /var/log/squid/store.log
# emulate_httpd_log off

# RESOURCES
#
------------------------------------------------------------------------------
# amount of memory used for caching recently accessed objects - defaults
to 8 MB
cache_mem 64 MB
maximum_object_size 10 MB # max cached object size
maximum_object_size_in_memory 300 KB # max cached-in-memory object size

# ACCESS CONTROL
#
------------------------------------------------------------------------------

# Purge access - zope servers can purge but nobody else
acl all src 0.0.0.0/0.0.0.0
acl zope_servers src 127.0.0.1
acl purge method PURGE
http_access allow zope_servers purge
http_access deny purge

# REDIRECTOR PROGRAM
#
------------------------------------------------------------------------------

url_rewrite_program /etc/squid/iRedirector.py
url_rewrite_children 1
url_rewrite_concurrency 20
url_rewrite_host_header off

# SPECIFY WHAT REQUESTS SQUID SHOULD CACHE
#
------------------------------------------------------------------------------
# Control what squid caches. We want to have squid handle content that
is not
# personalized and that does not require any kind of authorization.

# 1) Always cache static content in squid
acl static_content urlpath_regex -i
\.(jpg|jpeg|gif|png|tiff|tif|svg|swf|ico|css|js|vsd|doc|ppt|pps|xls|pdf|mp3|mp4|m4a|ogg|mov|avi|wmv|sxw|zip|gz|bz2|tgz|tar|rar|odc|odb|odf|odg|odi|odp|ods|odt|sxc|sxd|sxi|sxw|dmg|torrent|deb|msi|iso|rpm)$
cache allow static_content
# Also need to override squid's built-in Authorization header filter
refresh_pattern -i
\.(jpg|jpeg|gif|png|tiff|tif|svg|swf|ico|css|js|vsd|doc|ppt|pps|xls|pdf|mp3|mp4|m4a|ogg|mov|avi|wmv|sxw|zip|gz|bz2|tgz|tar|rar|odc|odb|odf|odg|odi|odp|ods|odt|sxc|sxd|sxi|sxw|dmg|torrent|deb|msi|iso|rpm)$
0 20% 4320 ignore-auth

# 2) Prevent squid from caching an item that is the result of a POST
acl post_requests method POST
cache deny post_requests

# 3) Prevent squid from caching requests from users authenticated via
cookies
acl ac_cookie req_header Cookie -i __ac
acl zope_cookie req_header Cookie -i _ZopeId=
cache deny ac_cookie
cache deny zope_cookie

------------------------------------------------------------------------------
Here the access log
------------------------------------------------------------------------------
2007/10/20 05:20:16| aclMatchAclList: checking all
2007/10/20 05:20:16| aclMatchAcl: checking 'acl all src 0.0.0.0/0.0.0.0'
2007/10/20 05:20:16| aclMatchIp: '192.168.1.33' found
2007/10/20 05:20:16| aclMatchAclList: returning 1
2007/10/20 05:20:17| aclCheck: checking 'http_access allow zope_servers
purge'
2007/10/20 05:20:17| aclMatchAclList: checking zope_servers
2007/10/20 05:20:17| aclMatchAcl: checking 'acl zope_servers src 127.0.0.1 '
2007/10/20 05:20:17| aclMatchIp: '192.168.1.33' NOT found
2007/10/20 05:20:17| aclMatchAclList: no match, returning 0
2007/10/20 05:20:17| aclCheck: checking 'http_access deny purge'
2007/10/20 05:20:17| aclMatchAclList: checking purge
2007/10/20 05:20:17| aclMatchAcl: checking 'acl purge method PURGE'
2007/10/20 05:20:17| aclMatchAclList: no match, returning 0
2007/10/20 05:20:17| aclCheck: NO match found, returning 1
2007/10/20 05:20:17| aclCheckCallback: answer=1
2007/10/20 05:20:17| The request GET http://testsite.zehndergroup.com/
is ALLOWED, because it matched 'purge'
2007/10/20 05:20:17| aclCheck: checking 'cache allow static_content'
2007/10/20 05:20:17| aclMatchAclList: checking static_content
2007/10/20 05:20:17| aclMatchAcl: checking 'acl static_content
urlpath_regex -i
\.(jpg|jpeg|gif|png|tiff|tif|svg|swf|ico|css|js|vsd|doc|ppt|pps|xls|pdf|mp3|mp4|m4a|ogg|mov|avi|wmv|sxw|zip|gz|bz2|tgz|tar|rar|odc|odb|odf|odg|odi|odp|ods|odt|sxc|sxd|sxi|sxw|dmg|torrent|deb|msi|iso|rpm)$'
2007/10/20 05:20:17| aclMatchRegex: checking
'/VirtualHostBase/http/testsite.zehndergroup.com:80/zehnderi/zehnderi/VirtualHostRoot/'
2007/10/20 05:20:17| aclMatchRegex: looking for
'\.(jpg|jpeg|gif|png|tiff|tif|svg|swf|ico|css|js|vsd|doc|ppt|pps|xls|pdf|mp3|mp4|m4a|ogg|mov|avi|wmv|sxw|zip|gz|bz2|tgz|tar|rar|odc|odb|odf|odg|odi|odp|ods|odt|sxc|sxd|sxi|sxw|dmg|torrent|deb|msi|iso|rpm)$'
2007/10/20 05:20:17| aclMatchAclList: no match, returning 0
2007/10/20 05:20:17| aclCheck: checking 'cache deny post_requests'
2007/10/20 05:20:17| aclMatchAclList: checking post_requests
2007/10/20 05:20:17| aclMatchAcl: checking 'acl post_requests method POST'
2007/10/20 05:20:17| aclMatchAclList: no match, returning 0
2007/10/20 05:20:17| aclCheck: checking 'cache deny ac_cookie'
2007/10/20 05:20:17| aclMatchAclList: checking ac_cookie
2007/10/20 05:20:17| aclMatchAcl: checking 'acl ac_cookie req_header
Cookie -i __ac'
2007/10/20 05:20:17| aclMatchAclList: no match, returning 0
2007/10/20 05:20:17| aclCheck: checking 'cache deny zope_cookie'
2007/10/20 05:20:17| aclMatchAclList: checking zope_cookie
2007/10/20 05:20:17| aclMatchAcl: checking 'acl zope_cookie req_header
Cookie -i _ZopeId='
2007/10/20 05:20:17| aclMatchAclList: no match, returning 0
2007/10/20 05:20:17| aclCheck: NO match found, returning 1
2007/10/20 05:20:17| aclCheckCallback: answer=1
2007/10/20 05:20:17| aclCheckFast: list: (nil)
2007/10/20 05:20:17| aclCheckFast: no matches, returning: 1
2007/10/20 05:20:17| Failed to select source for
'http://127.0.0.1:8080/VirtualHostBase/http/testsite.zehndergroup.com:80/zehnderi/zehnderi/VirtualHostRoot/'
2007/10/20 05:20:17| always_direct = 0
2007/10/20 05:20:17| never_direct = 0
2007/10/20 05:20:17| timedout = 0
2007/10/20 05:20:17| aclCheckFast: list: 0x8026f818
2007/10/20 05:20:17| aclMatchAclList: checking all
2007/10/20 05:20:17| aclMatchAcl: checking 'acl all src 0.0.0.0/0.0.0.0'
2007/10/20 05:20:17| aclMatchIp: '192.168.1.33' found
2007/10/20 05:20:17| aclMatchAclList: returning 1
2007/10/20 05:20:17| aclCheck: checking 'http_reply_access allow all'
2007/10/20 05:20:17| aclMatchAclList: checking all
2007/10/20 05:20:17| aclMatchAcl: checking 'acl all src 0.0.0.0/0.0.0.0'
2007/10/20 05:20:17| aclMatchIp: '192.168.1.33' found
2007/10/20 05:20:17| aclMatchAclList: returning 1
2007/10/20 05:20:17| aclCheck: match found, returning 1
2007/10/20 05:20:17| aclCheckCallback: answer=1
2007/10/20 05:20:17| The reply for GET
http://127.0.0.1:8080/VirtualHostBase/http/testsite.zehndergroup.com:80/zehnderi/zehnderi/VirtualHostRoot/
is ALLOWED, because it matched 'all'