Hello, We're running Apache 2.0.52 on RHEL 4.6 with mod_ssl. Recently, we had to significantly increase our Apache Timeout value to please some applications that don't split off the bulk of their calculations as background jobs. Doing this of cause, means that connections can get stuck for a longer time. In particular, we're frequently seeing lots of connections stuck in the "reading" state (i.e. TCP connection made but no HTTP request sent). Skimming though the list's archives, I've noticed several other people have had the issue of "lots of connections in ..Reading.. state". I've encountered some "vague" discussions about the possibility of this being caused by either firewall problems or the use of mod_ssl, but haven't yet found a message describing the exact problem, its cause or workarounds. So I'm currently left with the following questions: 1. These "..Reading.." connections occur when connecting to the HTTP port, but not sending an HTTP request. Can they occur when the web server is waiting for backend data (WebSphere, JBoss) or will the connection be shown in "W - Sending reply" in the Apache server status? 2. Are there obvious or well-known config mistakes to check when using mod_ssl, mod_jk and Websphere HTTP plugin that would result in an increased number of connections being stuck in "..Reading.." state? 3. I haven't figured out a reliable way of identifying the "..Reading.." connections: all sockets show up in the server status page and in netstat as being owned by the same process ID (I'm using worker MPM), but the server status page only displays info relevant to the last or current HTTP request being processed, so it seems that the client IP displayed next to "..Reading.." connections can't be used to ID them... 4. At least with Apache 2.2, I believe it is possible to not pass a socket to the Apache process unless data is actually present using the AcceptFilter directive, which would not pass "connected but not sending anything" connections to Apache. Is there a workaround to have the same feature on Apache 2.0 (as in: without upgrading to RHEL5 using apache 2.2) ? Thanks (for reading this far ;-)! Pieter --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
|