[Building Sakai] Loadbalancing problem, ajp connector, all workers are in error state

[Jean-Francois Leveque]

Hi Earle,

Could turning keep alive on also solve issues with separate load 
balancer + HTTPD ajp (with ProxyPass off for faster static delivery) + 
Sakai Tomcat ?

J-F

On 17/05/2012 17:46, Earle Nietzel wrote:
> Hi Jehan,
>
> Depending on your network configuration (i.e. apache http in DMZ, and
> tomcat in protected network).
>
> You will need to turn keep alive on so the ajp connections don't go
> stale. Many firewalls will drop connections after a certain time
> limit.
>
> If this doesn't work, you could try turning CPING on as that will
> first validate the connection before sending any data.
>
> Earle
>
> On Thu, May 17, 2012 at 2:23 AM, Jehan Badshah<jehan.badshah at nu.edu.pk>  wrote:
>> Dear All
>>
>> We have done loadbalancing using ajp connector with one apache2 (access
>> sever) and 3 tomcats. some time users/clients are getting error message
>> "Server temporally un-available". In apache access log I am getting message
>> "all workers are in error state"
>>
>>   what is problem in my following configuration?
>> please suggest.
>>
>>
>> //httpd.conf
>>
>> ProxyPass / balancer://myCluster/ stickysession=JSESSIONID|jsessionid
>> nofailover=On timeout=60
>> <Proxy balancer://myCluster>
>>      BalancerMember ajp://192.168.1.2:8009 route=sys02
>>      BalancerMember ajp://192.168.1.3:8009 route=sys03
>>      BalancerMember ajp://192.168.1.4:8009 route=sys04
>> </Proxy>
>>
>> Some one can  past their configuration?
>>
>>
>> Regards
>> ----------------------------------------------------
>> Jehan Badshah | Sr. Software Engineer&  Team Lead
>> Department of Research&  Development
>> National University of Computer and Emerging Sciences
>> A.K. Brohi Road, H-11/4, Islamabad
>> UAN: +92 (0)51 - 111 128 128 ext 344