https://bz.apache.org/bugzilla/show_bug.cgi?id=65281
--- Comment #8 from François PLOU <fp...@elcimai.com> --- Thanks for your answer. I have modified the response header in order to be compliant and problem is the same (check attachement : ok.har and ko.har) I confirm the request as reached Apache Tomcat as it is a direct connection between browser and Eclipse running Apache. There is no proxy. We have the same problem on production system after a tomcat upgrade and we have found a bypass (not a good one but it is a solution right now) by removing the header Etag from the response. Once Etag is removed, the browser does not send anymore the If-None-Match attribute and it works well. On this production system we have an Apache HTTP server in front of the Tomcat Server. And I can confirm we see the 400 status in the Tomcat log. Thanks -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org