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From Jess Holle <>
Subject Apache 2.2.3 mod_proxy issue
Date Fri, 27 Oct 2006 16:20:48 GMT
When I use:

    RewriteCond %{REQUEST_URI} /jsp-examples/(.*).jsp(.*)
    RewriteRule ^/(.*) ajp://localhost:8010/$1 [P]

and pound on Tomcat 5.5.20's /jsp-examples/jsp2/el/basic-arithmetic.jsp 
through Apache (with only a single thread doing the pounding), I start 
to get 503's after a while.  The error log says:

    [Fri Oct 27 10:49:42 2006] [error] (OS 10048)Only one usage of each socket address (protocol/network
address/port) is normally permitted.  : proxy: AJP: attempt to connect to (*)

This is on Windows.  I then look at netstat and see *loads* of 
connections in TIME_WAIT.  This would seem to strongly indicate that no 
connection pooling is being done -- at least not properly.

On the other hand, if I use:

    ProxyPass /jsp-examples ajp://localhost:8010/jsp-examples

This works fine!

I assume I should file a bug against mod_proxy -- or is this a known issue?

This has serious implications for those who route only JSP and servlet 
requests to Tomcat and let Apache serve all static content from a web 
app.  Many Tomcat folk would thus advise not using Apache at all, but I 
want to use it precisely for it's AJP-based load balancing.  One might 
say to use Apache 2.0 and mod_jk, which work fine, but I need 
authentication against multiple LDAPs -- which is another feature 2.2 
has over both 2.0 and Tomcat.

Jess Holle

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