[ https://issues.apache.org/jira/browse/TS-4829?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Miles Libbey resolved TS-4829. ------------------------------ Resolution: Fixed > Via: header string should not be cached > --------------------------------------- > > Key: TS-4829 > URL: https://issues.apache.org/jira/browse/TS-4829 > Project: Traffic Server > Issue Type: Bug > Reporter: Miles Libbey > Fix For: sometime > > > We use a cache hierarchy. In theory the Via: string shows the path the > request took through proxies, and with > proxy.config.http.insert_response_via_str set to 3, a lot of info is > presented -- cache hit, etc. (The Via header is described in > https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.45) > However, the string is cached, so it doesn't accurately reflect the path that > *this* request took. Instead, it shows the path of the original request. > For instance, imagine 2 servers, conveniently named child.example.com and > parent.example.com, which also represents their roles in the cache hierarchy. > The object is cacheable for a long time. > The first request for the object might look like: > Via: http/1.1 parent.example.com (ApacheTrafficServer/6.2.1 [uScMsSfWpSeN:t > cCMi p sS]), http/1.1 child.example.com (ApacheTrafficServer/6.2.1 [uScMsSf > pSeN:t cCMi pSs ]) > (with the cM meaning cache miss). The second request, a cache hit that just > goes through child.example.com might show: > Via: http/1.1 parent.example.com (ApacheTrafficServer/6.2.1 [uScMsSfWpSeN:t > cCMi p sS]), http/1.1 child.example.com (ApacheTrafficServer/6.2.1[uScHs f p > eN:t cCHi p s ]) > eg, cache Hit for child, but cache Miss for parent -- even though the parent > wasn't involved in the request, and, if it were, it would be a Hit. The > parent portion was cached by child.example.com. > The expected behavior is that the 2nd request would yield: > Via: http/1.1 child.example.com (ApacheTrafficServer/6.2.1[uScHs f p eN:t > cCHi p s ]) -- This message was sent by Atlassian JIRA (v6.3.4#6332)