Hello all, I got a strange behavior after I have upgraded squid from 2.6.STABLE21 to 3.3.5 on the parent proxy server. I have a file in the cache # zcat /var/log/squid/store.log-20130519.gz | grep 00000295 1368817711.745 SWAPOUT 00 00000295 83D4FBB382014271606DD58FADD64E98 200 1368817554 1368815579 -1 image/vnd.adobe.photoshop 635342245/635342245 GET http://storage.example.net/b4bf4e39486f405346adbd09505767af-index_v2.psd As we can see in the access log from main squid - first attempt from client (192.168.204.208) was unsuccessful # cat /var/log/squid/access-alt.log | grep b4bf4e39486f405346adbd09505767af 1368817711.751 158444 192.168.204.208 TCP_MISS/200 635342846 GET http://storage.example.net/b4bf4e39486f405346adbd09505767af-index_v2.psd - FIRST_PARENT_MISS/192.168.220.2 image/vnd.adobe.photoshop and the file was downloaded directly from server # zcat /var/log/squid/access.log-20130519.gz | grep b4bf4e39486f405346adbd09505767af 1368817552.345 0 192.168.220.1 UDP_MISS/000 94 ICP_QUERY http://storage.example.net/b4bf4e39486f405346adbd09505767af-index_v2.psd - NONE/- - 1368817711.745 158442 192.168.220.1 TCP_MISS/200 635342769 GET http://storage.example.net/b4bf4e39486f405346adbd09505767af-index_v2.psd - DIRECT/205.251.242.180 image/vnd.adobe.photoshop Later another client (192.168.203.121) trying to download the same file and get hit in the parent cache. 1369057070.790 79814 192.168.203.121 TCP_MISS/200 635342857 GET http://storage.example.net/b4bf4e39486f405346adbd09505767af-index_v2.psd - PARENT_HIT/192.168.220.2 image/vnd.adobe.photoshop So seems that everything work fine. Today after upgrading squid on the parent from 2.6 to 3.3.5 I have tried again download the same file # curl -v -O http://storage.example.net/b4bf4e39486f405346adbd09505767af-index_v2.psd d* About to connect() to storage.example.net port 80 (#0) * Trying xxx.xxx.xxx.198... connected * Connected to storage.example.net (xxx.xxx.xxx.198) port 80 (#0) > GET /b4bf4e39486f405346adbd09505767af-index_v2.psd HTTP/1.1 > User-Agent: curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.14.0.0 zlib/1.2.3 libidn/1.18 libssh2/1.4.2 > Host: storage.example.net > Accept: */* > % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 0 0 0 0 0 0 0 0 --:--:-- 0:00:01 --:--:-- 0* HTTP 1.0, assume close after body < HTTP/1.0 200 OK < Last-Modified: Fri, 17 May 2013 18:32:59 GMT < Accept-Ranges: bytes < Content-Type: image/vnd.adobe.photoshop < Content-Length: 635342245 < x-amz-id-2: +HuykoFgicH0hUFZQIBTU1AS8OZ7bN56vmcNxHz+1bYD8QOAwFseLuMQQElW4DZX < x-amz-request-id: 63F9E75242B5C0B9 < Date: Sun, 26 May 2013 18:34:32 GMT < ETag: "5b98acdf5929a2344aa9c3bbee870943" < Server: AmazonS3 < Age: 0 < X-Cache: HIT from svn-parent.example.lan < X-Cache-Lookup: HIT from svn-parent.example.lan:3128 < Via: 1.1 svn-parent.example.lan (squid/3.3.5) < X-Cache: MISS from squid.example.lan < X-Cache-Lookup: MISS from squid.example.lan:3129 < Connection: close < { [data not shown] 100 605M 100 605M 0 0 82.9M 0 0:00:07 0:00:07 --:--:-- 110M* Closing connection #0 And in the log I see the following lines main squid 1369593277.244 5787 192.168.210.102 TCP_MISS/200 635342835 GET http://storage.example.net/b4bf4e39486f405346adbd09505767af-index_v2.psd - FIRST_PARENT_MISS/192.168.220.2 image/vnd.adobe.photoshop parent squid (3.3.5) # cat /var/log/squid/access.log | grep b4bf4e39486f405346adbd09505767af 1369593271.465 0 192.168.220.1 UDP_MISS/000 94 ICP_QUERY http://storage.psd2html.com/b4bf4e39486f405346adbd09505767af-index_v2.psd - HIER_NONE/- - 1369593277.206 5741 192.168.220.1 TCP_REFRESH_UNMODIFIED/200 635342757 GET http://storage.psd2html.com/b4bf4e39486f405346adbd09505767af-index_v2.psd - HIER_DIRECT/176.32.100.198 image/vnd.adobe.photoshop As I understand from HIER_DIRECT/176.32.100.198 the file was downloaded directly from server instead of local cache. On the parent server I have the following refresh pattern refresh_pattern \.psd$ 129600 100 129600 override-lastmod override-expire ignore-reload refresh_pattern \.zip$ 129600 100 129600 override-lastmod override-expire ignore-reload refresh_pattern \.rar$ 129600 100 129600 override-lastmod override-expire ignore-reload Did I miss something? Thanks in advance