FYI - The other bug is now cleared, also I prepared a simplified test that I'll add now to the SRU description. Could this be reevaluated for upload to proposed?
** Description changed: [Impact] - * hang until ProxyTimeout timeout if ProxyErrorOverride is set - * see https://bz.apache.org/bugzilla/show_bug.cgi?id=53420 for more + * hang until ProxyTimeout timeout if ProxyErrorOverride is set + * see https://bz.apache.org/bugzilla/show_bug.cgi?id=53420 for more [Test Case] - * use the feature of https://httpd.apache.org/docs/current/mod/mod_proxy.html#proxyerroroverride + 1. spawn 2x trusty container + 2. install apache2 on both + 3. Mark /var/www/html/index.html to verify frontend/backend setup + 4. enable mod_proxy and ProxyErrorOverride Directive + ln -s ln -s /etc/apache2/mods-available/xml2enc.load /etc/apache2/mods-enabled/ + ln -s /etc/apache2/mods-available/proxy* /etc/apache2/mods-enabled/ + rm /etc/apache2/mods-enabled/proxy_balancer.* + On Frontend in /etc/apache2/mods-enabled/proxy.conf add (IP is backend) + ProxyPass "/proxme" "http://10.0.4.44/"; + ProxyPassReverse "/proxme" "http://10.0.4.44/"; + ProxyErrorOverride On + ProxyTimeout 5 + 5. verify that: + on http:/Frontend/proxme you get the backend index.html page + local and remote pages still work fine + local errors are still fast + proxied errors are slowed by ProxyTimeout (5 sec) + time wget http://10.0.4.95/proxme/index-notthere.html + real 0m4.987s + proxied errors are slow now + time wget http://10.0.4.95/proxme/index-notthere.html + real 0m4.987s + ab -n 100 -c 100 http://10.0.4.95/proxme/index-notthere.html + Total: 4931 5186 433.9 4934 5936 + 6. On Frontend enable proposed, update and restart apache2 + 7. Verify things are now fast + time wget http://10.0.4.95/proxme/index-notthere.html + ab -n 100 -c 100 http://10.0.4.95/proxme/index-notthere.html [Regression Potential] - * the patch is small and already backported by Apache people which is good - * The changes are local to mod_proxy only which should limit the potential fallout - * all basic tests I did still work, but we have to rely on a real test by the reporter from proposed for the actual Test + * the patch is small and already backported by Apache people which is good + * The changes are local to mod_proxy only which should limit the potential fallout + * all basic tests I did still work, but we have to rely on a real test by the reporter from proposed for the actual Test [Original Description] Like described in #53420 [1] there is a bug in Apache 2.4.x which is fixed in 2.4.11. This bug leads to slow 404 responses when ProxyErrorOverride is activated. -------------------- When setting ProxyErrorOverride to "On" to get the httpd-ErrorDocument instead of the backend-errordoc, httpd is waiting "ProxyTimeout" seconds to respond to the client, even though the response is already read from backend server. -------------------- The bug is fixed in 2.4.11 [2]. Is there any chance to get this fix into the Ubuntu package for 14.04 LTS? [1] https://bz.apache.org/bugzilla/show_bug.cgi?id=53420 [2] https://svn.apache.org/viewvc?view=revision&revision=1621601 ----------- $ apt-cache policy apache2 apache2: Installed: 2.4.7-1ubuntu4.5 Candidate: 2.4.7-1ubuntu4.5 Version table: *** 2.4.7-1ubuntu4.5 0 500 http://de.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages 100 /var/lib/dpkg/status 2.4.7-1ubuntu4 0 500 http://de.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages ----------- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1495988 Title: ProxyErrorOverride leads to slow 404 responses To manage notifications about this bug go to: https://bugs.launchpad.net/apache2/+bug/1495988/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
