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Message-ID: <51B73337.3010106@christopherschultz.net>
Date: Tue, 11 Jun 2013 10:24:55 -0400
From: Christopher Schultz <chris@christopherschultz.net>
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To: Tomcat Users List <users@tomcat.apache.org>
Subject: Re: http request (no only session) replication in cluster
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Ja,

On 6/11/13 9:54 AM, Ja kub wrote:
> What can be done to guarantee failover in below scenario:
> 
> 2 tomcats behind cisco loadbalancer 1 http request can last very
> long about 50 seconds - response from webservice can take so long 
> load is 200 requests per second I must response in max 4 seconds
> more than backing webservice
> 
> is there something like http request replication ?
> 
> 50 s * 200 req/s = 10.000 pending requests
> 
> if one tomcat is eg killed, can in any way other tomcat serve his
> requests ?
> 
> is there any out of the box solution, eg similar to session
> replication ?

The best way to do this is to configure your load balancer to buffer
responses and re-try another cluster node in the case of an unexpected
disconnect.

If you can't buffer the response, then it is entirely inappropriate to
re-process a request: instead, you should let the failure propagate
all the way back to the client and let them decide what to do.

> is it possible to save socket to database, or send it via network?

No. I think you are confused about what a socket is.

- -chris
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