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I am using Apache2 as a reverse proxy for tomcat, my configuration being something like:

ProxyRequests Off

ProxyPass        / http://localhost:8080/
ProxyPassReverse / http://localhost:8080/

My question is: can I configure Apache to show up a courtesy page (an "under construction" HTML static page) whenever Tomcat is down?

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up vote 3 down vote accepted

You can use the Apache ErrorDocument directive to do this. You should use a URL to point to your ErrorDocument otherwise if you use a filesystem reference you will get an additional 503 whilst trying to find it.

ErrorDocument 503 http://somehost.tld/errors/503.html
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That is correct, since I am proxying all the pages starting from "/", so there won't be any web server actually servicing an error page of the type "/var/www/html/error/gonefishing.html" –  Overflow May 13 '11 at 11:29
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Apache will throw a 503 "Service unavailable" error when it can't connect to Tomcat. You could just create a "nice" 503 error page.

ErrorDocument 503 /var/www/html/error/gonefishing.html
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Pardon my ignorance.But can't you put ProxyPass /var/www/html/error ! to ignore just that folder and so serve up the page from that folder ?

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