With 2 workers, the system has been working well for months. I now wanted to add an extra two workers, i.e. a total of 4 tomcats, and load balance across all 4. Is this possible?
With respect to the worker names, a number works well. I have set the jvmRoute to be numbers too, and my app directs users to the respective worker using the MITM jsession followed by a dot followed by worker name discussed in forum a few months ago. i.e. https://app.somedomain.com/login.do;jsessionid=w.2 -> forces it to use tomcat jvmRoute=2 e.g. <Service name="Catalina"> <Connector port="8019" protocol="AJP/1.3" redirectPort="443" address="206.188.29.148" /> <!-- You should set jvmRoute to support load-balancing & redirect via AJP --> <Engine name="Catalina" defaultHost="localhost" jvmRoute="1"> <Host name="localhost" unpackWARs="false" autoDeploy="false" xmlValidation="false" xmlNamespaceAware="false"> Also, what do mean by "This can't work, since the loadbalancer has no idea what you mean by worker 3 and 4 .." worker.loadbalancer.balance_workers=1,2,3,4 1,2 works. 2,4 work, but if I add one more, e.g.1,2,4 apache fails to start. I defined all 4 workers. Does anyone have any hints or links, samples on how I can get Apache talking to more than 2 tomcat workers? It is possible, right? Regards Andrew On Tue, Sep 7, 2010 at 6:15 PM, Rainer Jung <rainer.j...@kippdata.de> wrote: > See remarks inline. > > On 07.09.2010 10:01, Andrew Bruno wrote: >> >> Fair enough Pid, here it is: >> >> Windows 2008 R2 64 Bit >> Java(TM) SE Runtime Environment (build 1.6.0_17-b04) / Java >> HotSpot(TM) 64-Bit Server VM (build 14.3-b01, mixed mode) >> Tomcat 6.0.28 >> Apache 2.2.15 >> mod_jk-1.2.30-httpd-2.2.3.so >> >> AB >> >> >> On Tue, Sep 7, 2010 at 5:52 PM, Pid<p...@pidster.com> wrote: >>> >>> On 07/09/2010 08:44, Andrew Bruno wrote: >>>> >>>> Hello, >>>> >>>> I am trying to add two extra workers, totaling 4 workers, but Apache >>>> fails to restart. >>>> >>>> This worker file works: >>>> >>>> # List the workers name >>>> worker.list=1,2,loadbalancer > > If you only want to use workers 1 and 2 via the loadbalancer, you can remove > them from worker.list and only keep the loadbalancer there. > >>>> # ---------------- >>>> # First worker >>>> # ---------------- >>>> worker.1.host=206.xx.xxx.xxx >>>> worker.1.port=8019 >>>> worker.1.type=ajp13 >>>> worker.1.lbfactor=4 >>>> >>>> # ---------------- >>>> # Second worker >>>> # ---------------- >>>> worker.2.host=206.xx.xxx.xxx >>>> worker.2.port=8029 >>>> worker.2.type=ajp13 >>>> worker.2.lbfactor=5 >>>> > > Strange lbfactors ... > >>>> # ---------------------- >>>> # Load Balancer worker >>>> # ---------------------- >>>> worker.loadbalancer.type=lb >>>> worker.loadbalancer.balance_workers=1,2,3,4 > > This can't work, since the loadbalancer has no idea what you mean by worker > 3 and 4 ... > >>>> BUT WHEN I change to: >>>> >>>> >>>> worker.list=1,2,3,4,loadbalancer > > Same comment as above concerning worker.list > >>>> worker.1.host=206.xx..xx.xx >>>> worker.1.port=8019 >>>> worker.1.type=ajp13 >>>> worker.1.lbfactor=4 >>>> >>>> worker.2.host=206.xx..xx.xx >>>> worker.2.port=8029 >>>> worker.2.type=ajp13 >>>> worker.2.lbfactor=5 >>>> >>>> worker.3.host=206.xx..xx.xx >>>> worker.3.port=8039 >>>> worker.3.type=ajp13 >>>> worker.3.lbfactor=1 >>>> >>>> worker.4.host=206.xx.xx.xx >>>> worker.4.port=8049 >>>> worker.4.type=ajp13 >>>> worker.4.lbfactor=2 > > And there are connectors in the Tomcat configuration listening on those > ports 8019, ..., 8049, right? > >>>> worker.loadbalancer.type=lb >>>> worker.loadbalancer.balance_workers=1,2,3,4 >>>> >>>> I get these kind of errors, and Apache fails to start >>>> >>>> [Tue Sep 07 00:36:37 2010] [18324:16360] [error] jk_lb_worker.c >>>> (1536): allocating lb sub worker record from shared memory > > There's a problem creating the workers when trying to access shared memory. > Could you please show us your complete mod_jk configuration, especially the > "Jk*" directives for Apache? Do you have an JkShmSize set? > > Are there any info, warn or error messages during startup and before this > failure? > >>>> [Tue Sep 07 00:36:37 2010] [18324:16360] [error] jk_worker.c (163): >>>> validate failed for loadbalancer >>>> [Tue Sep 07 00:36:37 2010] [18324:16360] [error] jk_worker.c (262): >>>> failed to create worker loadbalancer >>>> [Tue Sep 07 00:38:03 2010] [16864:7456] [error] jk_ajp_common.c >>>> (2929): allocating ajp worker record from shared memory >>>> [Tue Sep 07 00:38:03 2010] [16864:7456] [error] jk_worker.c (151): >>>> factory for ajp13 failed for 2 >>>> [Tue Sep 07 00:38:03 2010] [16864:7456] [error] jk_lb_worker.c (1603): >>>> Failed creating worker 2 >>>> [Tue Sep 07 00:38:03 2010] [16864:7456] [error] jk_lb_worker.c (1651): >>>> NULL parameters >>>> [Tue Sep 07 00:38:03 2010] [16864:7456] [error] jk_worker.c (163): >>>> validate failed for loadbalancer >>>> [Tue Sep 07 00:38:03 2010] [16864:7456] [error] jk_worker.c (262): >>>> failed to create worker loadbalancer >>>> [Tue Sep 07 00:38:39 2010] [7272:16728] [error] jk_ajp_common.c >>>> (2929): allocating ajp worker record from shared memory >>>> [Tue Sep 07 00:38:39 2010] [7272:16728] [error] jk_worker.c (151): >>>> factory for ajp13 failed for 1 >>>> [Tue Sep 07 00:38:39 2010] [7272:16728] [error] jk_lb_worker.c (1603): >>>> Failed creating worker 1 >>>> [Tue Sep 07 00:38:39 2010] [7272:16728] [error] jk_lb_worker.c (1651): >>>> NULL parameters >>>> [Tue Sep 07 00:38:39 2010] [7272:16728] [error] jk_worker.c (163): >>>> validate failed for loadbalancer >>>> [Tue Sep 07 00:38:39 2010] [7272:16728] [error] jk_worker.c (262): >>>> failed to create worker loadbalancer >>>> >>>> How do I allow Apache to communicate to 4 tomcats? >>> >>> Exact HTTPD, Tomcat, mod_jk versions? > > Regards, > > Rainer > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
