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    <p>I am trying to deploy a jruby on rails application. </p> <p>Right now I am running mongrel + Apache2 using reverse proxy from mod_proxy. However, because mongrel_jcluster does not work for the latest versions of jruby, I am only able to run one mongrel server, and cant take advantage of load balancing from apache2.</p> <p>Is there any way other way to create a mongrel cluster? I'd really prefer mongrel cluster + apache2 to a java servlet type system.</p> <p>I've tried jetty using the instructions here: <a href="http://jetty-rails.rubyforge.org/" rel="nofollow noreferrer">http://jetty-rails.rubyforge.org/</a></p> <p>but I get the following error when starting up the jetty server, even though I've checked my activerecord-jdbcmysql-adapter gem version under jruby and its there and version 0.9.7</p> <pre><code>DEPRECATION WARNING: require "activesupport" is deprecated and will be removed in Rails 3. Use require "active_support" instead. (called from /home/andrew/.gem/jruby/1.8/gems/activesupport-2.3.8/lib/activesupport.rb:2) 2010-07-20 17:00:46.820::INFO: Logging to STDERR via org.mortbay.log.StdErrLog Starting server 3000 2010-07-20 17:00:47.134::INFO: jetty-6.1.14 2010-07-20 17:01:03.511:/:INFO: Info: using runtime pool timeout of 30 seconds 2010-07-20 17:01:03.511:/:INFO: Info: received min runtimes = 1 2010-07-20 17:01:03.511:/:INFO: Info: received max runtimes = 5 Loading parser from serialized file lib/stanford-parser/englishPCFG.ser.gz ... done [4.6 sec]. 2010-07-20 17:01:14.341:/:WARN: Error: unable to initialize application org.jruby.rack.RackInitializationException: Please install the jdbcmysql adapter: `gem install activerecord-jdbcmysql-adapter` (no such file to load -- active_record/connection_adapters/jdbcmysql_adapter) </code></pre> <p>any suggestions would be appreciated, thanks!</p> <p><b> EDIT: </b> I don't know if this makes a difference, but I am able to tell that before it crashes, jetty_rails successfully loads a global variable declared in the environment.rb</p> <p><b> EDIT: </b> here is my full gem list from <code>jruby -S gem list --local</code></p> <pre><code>*** LOCAL GEMS *** actionmailer (2.3.8) actionpack (2.3.8) activerecord (2.3.8) activerecord-jdbc-adapter (0.9.7) activerecord-jdbcmysql-adapter (0.9.7) activeresource (2.3.8) activesupport (2.3.8) builder (2.1.2) gem_plugin (0.2.3) jdbc-mysql (5.0.4) jetty-rails (0.8.1) jruby-jars (1.5.1) jruby-openssl (0.7) jruby-rack (1.0.1) mizuno (0.3.6) mongrel (1.1.5) rack (1.1.0) rails (2.3.8) rake (0.8.7) rubyzip (0.9.4) sources (0.0.1) warbler (1.1.0) </code></pre>
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