No firewall, all on one server.  Right now, I'm thinking I'm either hitting
some type of tcp connection maximum or something is going on with Apache or
mod_jk.  If I just restart Apache, i can connect to Tomcat again which
tells me Tomcat wasn't down.

Cheers,
Charles

On Mon, Oct 29, 2012 at 10:39 AM, Daniel Mikusa <dmik...@vmware.com> wrote:

> On Oct 29, 2012, at 8:37 AM, Charles Richard wrote:
>
> > Hi,
> >
> > I had a thread a while back but my configuration has changed and so has
> my
> > issue, so hence a new thread.
> >
> > My config:
> >
> > CentOS 5.8
> > Apache 2.23
> > 3 tomcat instances (6.0.30) with each ajp_port with a connectionTimeout
> > setting of 180000
> > mod_jk 1.2.37
> >
> > workers.properties:
> >
> > # Define 1 real worker using ajp13
> > worker.list=worker1, worker2, worker3, lbworker
> >
> > # Set properties for worker1 (ajp13)
> > worker.worker1.type=ajp13
> > worker.worker1.host=localhost
> > worker.worker1.port=8009
> > worker.worker1.connection_pool_timeout=180
> > worker.worker1.lbfactor=1
> > worker.worker1.ping_mode=A
> > worker.worker1.socket_keepalive=true
> >
> > # Set properties for worker2 (ajp13)
> > worker.worker2.type=ajp13
> > worker.worker2.host=localhost
> > worker.worker2.port=8010
> > worker.worker2.connection_pool_timeout=180
> > worker.worker2.lbfactor=1
> > worker.worker2.ping_mode=A
> > worker.worker2.socket_keepalive=true
> >
> > # Set properties for worker3 (ajp13)
> > worker.worker3.type=ajp13
> > worker.worker3.host=localhost
> > worker.worker3.port=8011
> > worker.worker3.connection_pool_timeout=180
> > worker.worker3.lbfactor=1
> > worker.worker3.ping_mode=A
> > worker.worker3.socket_keepalive=true
> >
> > worker.lbworker.type=lb
> > worker.lbworker.balance_workers=worker1, worker2, worker3
> > worker.lbworker.sticky_session=True
> >
> > I'm doing some performance tuning on our application and noticed a couple
> > of days ago that which a load of 1500 users, my threads in VisualVM would
> > turn white in a "off/unknown state" (can send a snapshot of this on
> > demand). Since then, I added the ping_mode and socket_keepalive setting
> in
> > my workers.properties file but that didn't seem to make a difference.
>  All
> > i see in my mod_jk log is this:
> >
> > [Mon Oct 29 09:16:56 2012] [12205:47535048426352] [info]
> > ajp_handle_cping_cpong::jk_ajp_common.c (913): timeout in reply cpong
> > [Mon Oct 29 09:16:56 2012] [12205:47535048426352] [info]
> > ajp_maintain::jk_ajp_common.c (3289): (worker2) failed sending request,
> > socket -1 keepalive cping/cpong failure (errno=24)
> > [Mon Oct 29 09:18:36 2012] [10542:47535048426352] [info]
> > ajp_handle_cping_cpong::jk_ajp_common.c (913): timeout in reply cpong
> > [Mon Oct 29 09:18:36 2012] [10542:47535048426352] [info]
> > ajp_maintain::jk_ajp_common.c (3289): (worker2) failed sending request,
> > socket -1 keepalive cping/cpong failure (errno=24)
> >
> > Any idea what could be going on?
>
> Do you have a firewall between Apache HTTPD and your Tomcat instances?
>
> Dan
>
>
> > Thanks,
> > Charles
>
>
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