r1023398 for 2.2: http://people.apache.org/~covener/patches/httpd-2.2.x-thunder.diff
The remove_url() prevents other threads from serving a stale cached file during refresh of a slow response, but it's unnecessary to have a separate path because the refresh has to deal with 200s already. When the remove_url was added, there as no thundering herd lock / no ability to serve stale content while one guy was reloading. On Tue, Apr 8, 2014 at 2:11 PM, Jim Riggs <apache-li...@riggs.me> wrote: > https://issues.apache.org/bugzilla/show_bug.cgi?id=50317 > > While we are at ApacheCon, I would love to address this nasty bug with > someone familiar with 2.2's mod_cache. Our sites were brought down a few > times last year before we finally tracked it down to being this particular > bug. I am using a crude backport of the 2.3 patch (r1023398) in 2.2. It > works, but I don't know if it is correct. > > Can someone look at this one with me? We really need to get this fixed in > 2.2, because there is NO thundering herd protection at all as things stand > right now. > > - Jim > -- Eric Covener cove...@gmail.com
