2009/5/12 André Warnier <a...@ice-sa.com>: > Michael Biebl wrote: >>>>>> >>>>>> ... >>>>>> ProxyRequests Off >>>>>> ProxyVia On >>>>>> ProxyPass /t/ ajp://localhost:8009/barcooServer/t/ >>>>>> ProxyPass /ws/ ajp://localhost:8009/barcooServer/ws/ >>>>>> ProxyPass /reports/ ajp://localhost:8009/barcooServer/reports/ >>>>>> ProxyPass / ajp://localhost:8009/barcooWebsite/ >>>>>> ProxyPassReverse / ajp://localhost:8009/barcooWebsite/ >>>>>> ProxyPassReverseCookiePath /barcooWebsite / >>>>>> ... >>>>>> >> >> As you can see, I have 4 ProxyPass directives. Does that mean that I >> will get 4 ajp connections from apache to tomcat per user request, ie. >> if say 200 users are online I have 800 connections open? >> > I don't think so. I assume the first matching one will immediately cause > the proxying to happen for this request. > >> Is it correct, that apache uses ipv6 for the ajp connection (as the >> log is talking about tcpv6)? >> > Dunno. I presume that this is because port 8009 is just by default opened > as IPv6. Though since that whole area is not very clear to me yet, I may be > talking nonsense here. > >>> And it is not Tomcat complaining, it is some other system component that >>> writes to kernel.log. >> >> I know, it's the kernel that is dropping the connections. > > So, /what/ in the kernel is dropping connections, and after how many > connections ? > I mean, if it is 5000 connections, that "thing" may be right, but maybe this > limit is set ridicuously low.
Does anyone know, what the actual kernel limits are? Is that an absolute number or connection attempts / per timeframe? Is there a way to tweak this settings (e.g. via sysctl)? > >> I'm wondering if there is a limit of open ajp connections? > > There is obvously a limit set by /something/ as to the number of requests > for *new* connections to port 8009 within a certain timeframe. > > I run a numer of Linux Debian systems, some of them Lenny. I have never > seen this message before. > My systems use mod_jk as a connector though, not mod_proxy_ajp. > > So maybe you should try mod_jk for a while ? If the problem suddenly > disappears, then at least you've got a clue. > > You should also re-read Rainer's answer. He's THE mod_jk expert on this > forum. I somehow had the impression from reading docs and tutorial on the web, that mod_proxy_ajp is favored nowadays over mod_jk. (being more actively developed, more flexible and easier to integrate into apache) Is that impression wrong? > > What about this : >>> >>> Other than that, is there any log facility available in mod_proxy_ajp, >>> which >>> you could set to "debug" for a while to see what is really going on from >>> that side ? >> > It would be interesting to know how many connections mod_ajp *tries* to > create. I'll try to get more solid numbers. Thanks for the hints so far, Michael -- Why is it that all of the instruments seeking intelligent life in the universe are pointed away from Earth? --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
