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| Re: Load balancing with cookies disabled [message #715521 is a reply to message #714546] |
Sun, 14 August 2011 10:08   |
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Hi,
the RAP client does not support rewriting URLs for static resources.
Feel free to open an enhancement request.
I first thought it should be fair to deliver static content from a
dedicated node, since the load is mostly caused by ui requests which are
all POSTs. But I see that this would require to somehow synchronize the
resources...
Best regards,
Ralf
On 08/10/2011 09:37 PM, Graham wrote:
> Hi,
>
> We have some RAP 1.3.X applications which are load balanced with apache
> mod_proxy across 4 instances of RAP with embedded jetty. I've followed
> instructions from other posts reqarding using a jetty worker name for
> the HashSessionIdManager. This works great and load balances across my 4
> instances. I want to disable cookies now so that I can have multiple
> browser instances open. I followed other posts that showed how to set
> the session manager setUsingCookies to false. The problem that I've
> discovered is that all http "post" requestes have the jessionid appended
> on the url but the get requests do not.
> I've supplied a couple of the Post and Get requests (stripped off most
> of it but wanted to show the URL and the cookie)
>
> 1) Example HTTP Post and GET(cookies set to TRUE)
>
> POST /entrypointname?nocache=1313003230084 HTTP/1.1
> Cookie: JSESSIONID=JVM11nzlmas86tpxjlzei4d6iar2g.JVM1;
> settingStore=1312991667919_0
>
> GET /rwt-resources/resource/widget/rap/cursors/alias.gif HTTP/1.1
> Cookie: JSESSIONID=JVM11nzlmas86tpxjlzei4d6iar2g.JVM1;
> settingStore=1312991667919_0
>
> This load balances correctly but I cannot run multiple browser instances.
>
> 2) Example HTTP Post and GET(cookies set to FALSE)
>
> POST
> /entrypointname;jsessionid=JVM11nzlmas86tpxjlzei4d6iar2g.JVM1?nocache=1313003216824
> HTTP/1.1
>
> GET /rwt-resources/resource/widget/rap/cursors/alias.gif HTTP/1.1
>
> This only load balances the posts but not the gets correctly.
>
> You can see that the get url does not have the jessionid appended and so
> when Apache mod_proxy looks for the jetty worker name is doesn't find
> one and then send the request to a different JVM which produces http 404
> error codes.
>
> Any ideas? Also moving to RAP 1.4 is not an option at this point. We're
> too close to implement this to production. Is there a way to get the
> jsession id appened to the get urls?
>
> Thanks in advance
--
Ralf Sternberg
Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/
Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/
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