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From Tom Evans <tevans...@googlemail.com>
Subject Re: [users@httpd] [proxy_http:error] [pid 13256:tid 47013272524544] (11)Resource temporarily unavailable: [client 172.31.0.142:21815] AH01110: error reading response
Date Fri, 25 Jul 2014 14:49:59 GMT
On Fri, Jul 25, 2014 at 11:37 AM,  <Ulrich.Herbst@t-systems.com> wrote:
> Hi,
>
> we have apaches as reverse proxies for some tomcat and wso2-application
> servers.
>
> We get this error message on a high-load-webserver:
>
> [proxy_http:error] [pid 13256:tid 47013272524544] (11)Resource temporarily
> unavailable: [client 172.31.0.142:21815] AH01110: error reading response
>
> And we have no clue, which resource is unavailable and what to do against
> it.
>
> Apache-2.4.10 / apr-1.5.1
>
> Ulimit of apache-user:
> core file size          (blocks, -c) 0
> data seg size           (kbytes, -d) unlimited
> scheduling priority             (-e) 0
> file size               (blocks, -f) unlimited
> pending signals                 (-i) 46666
> max locked memory       (kbytes, -l) 655360
> max memory size         (kbytes, -m) unlimited
> open files                      (-n) 655360
> pipe size            (512 bytes, -p) 8
> POSIX message queues     (bytes, -q) 819200
> real-time priority              (-r) 0
> stack size              (kbytes, -s) unlimited
> cpu time               (seconds, -t) unlimited
> max user processes              (-u) 655360
> virtual memory          (kbytes, -v) unlimited
> file locks                      (-x) unlimited
>
> $ cat /proc/sys/kernel/threads-max
> 2065067
>
>
> So, I don’t see any visible shortage of anything.
>
>
> Any ideas how to find the reason for this error ?
>
> Uli
>

Running out of shm?

How are you proxying to tomcat (http/ajp/jk2)?

Cheers

Tom

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