Anyone successfully ran JRuby 1.5.3, Rails 3, Tomcat6

okkezSS · October 30, 2010, 3:22am

Hi,
I’ve been trying to get JRuby 1.5.3 with Rails 3 to run on the Tomcat6
server with little success.
Has anyone been able to do this? If so, what issues did you have to
overcome to get this to work?
Also, is this a combination that you would recommend for a production
site, or is it all too new and untested?
The latest issue I’m stuck on right now is with the mysql-connector-
java-5.0.4 which comes with jruby 1.5.3 which keeps returning
JDBCError: Generated keys not requested.
Any feedback on this would be appreciated.
Thanks.

MJW2529 · October 31, 2010, 8:50am

can you run
$ jruby -S rails server
?
how does your Gemfile look like ?
how do you setup your war files ? with warbler ?

regards, Kristian

MJW2529 · November 1, 2010, 5:48am

I setup the war file with warbler. Here’s the Gemfile:

source ‘http://rubygems.org’
gem ‘rails’, ‘3.0.1’

Bundle edge Rails instead:

gem ‘rails’, :git => ‘git://github.com/rails/rails.git’

#gem ‘sqlite3-ruby’, :require => ‘sqlite3’
gem “activerecord-jdbcmysql-adapter”, ‘1.0.2’, :require =>‘arjdbc’ if
defined?(JRUBY_VERSION)

Use unicorn as the web server

gem ‘unicorn’

Deploy with Capistrano

gem ‘capistrano’

To use debugger

gem ‘ruby-debug’

Bundle the extra gems:

gem ‘bj’

gem ‘nokogiri’

gem ‘sqlite3-ruby’, :require => ‘sqlite3’

gem ‘aws-s3’, :require => ‘aws/s3’

Bundle gems for the local environment. Make sure to

put test-only gems in this group so their generators

and rake tasks are available in development mode:

group :development, :test do

gem ‘webrat’

end

In the config/warbler.rb file I also have the following line
uncommented:

config.gems += [“activerecord-jdbcmysql-adapter”, “jruby-openssl”]

Also, the “jruby -S rails server” command brings up the WEBrick
server not Tomcat.
I propose to run Tomcat in the production environment.

MJW2529 · November 2, 2010, 3:07am

Thanks for your help so far Kristan. I’ve put the entries that you
suggested into my Gemfile and redeployed to Tomcat but I still get the
following error back.
SEVERE: Application Error
org.jruby.rack.RackInitializationException: ActiveRecord::JDBCError:
Generated keys not requested. You need to specify
Statement.RETURN_GENERATED_KEYS to Statement.executeUpdate() or
Connection.prepareStatement().: SET SQL_AUTO_IS_NULL=0

When I deploy this under the WEBrick server it runs fine (although I
not creating a war file for the WEBrick server).
Is there anyway to ensure that the deployed war file is using the same
stack as my development environment?
Thanks.

MJW2529 · November 2, 2010, 3:49am

first I have to mention warble produces a production environment, so
maybe you need to somehting like
$ jruby -S rake :db:setup

then you can use the ruby-maven gem
$ jruby -S gem install ruby-maven --pre
which comes with jetty setup which you can just start with
$ jetty-run
and this runs in development mode or for production
$ jetty-run -e production
and of course to compare you should also see that webrick works in
production mode
$ jruby rails s -e production
and then with the ruby-maven gem you can produces another warfile
which might be slightly different from what warble produces (target/
XZY.war):
$ rmvn package

with this we should be able to see whether this is tomcat or the
servlet stack as such (since we can compare it jetty). is that all the
stacktrace you get, can you increase logging on production - maybe
there is more to see.

let’s see if this helps to narrow down the issue

regards, Kristian

MJW2529 · November 1, 2010, 9:22pm

my typical Gemfile starts like this and works without a problem with
jetty and your error does not look tomcat-related. I would not use
config.gems just add the gems you need in Gemfile.

-- mode: ruby --

source ‘http://rubygems.org’

gem ‘rails’, ‘3.0.0’

Bundle edge Rails instead:

gem ‘rails’, :git => ‘git://github.com/rails/rails.git’

gem ‘mysql2’, :require => ‘sqlite3’ unless defined?(JRUBY_VERSION)
gem “activerecord-jdbc-adapter” if defined?(JRUBY_VERSION)
gem “jdbc-mysql”, :require => false if defined?(JRUBY_VERSION)

in my Gemfile.lock I see
activerecord-jdbc-adapter (0.9.4-java)

maybe that setup helps.
regards, Kristian

MJW2529 · November 2, 2010, 7:01am

from the stacktrace I see that it tries to create a new artist on
startup. is this done somehow in an initializer or some so ?

the actual error says that the autoincremented ids are not handled
correctly. since you say it works with development webrick, it is not
config problem as such. but you need to make sure that webrick against
the production DB works:

$ jruby -S rails server -r production

regards Kristian

PS still do not believe it is related to the servlet/tomcat as such

MJW2529 · November 2, 2010, 4:34am

I’ll go ahead and complete the process that you’ve outlined and see if
I can narrow it down.
In the meantime here’s the complete trace of the error.

Nov 1, 2010 7:10:45 PM org.apache.catalina.core.ApplicationContext log
SEVERE: Application Error
org.jruby.rack.RackInitializationException: ActiveRecord::JDBCError:
Generated keys not requested. You need to specify
Statement.RETURN_GENERATED_KEYS to Statement.executeUpdate() or
Connection.prepareStatement().: SET SQL_AUTO_IS_NULL=0
from /Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-
jdbc-adapter-1.0.2-java/lib/arjdbc/jdbc/adapter.rb:178:in execute' from /Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord- jdbc-adapter-1.0.2-java/lib/arjdbc/mysql/adapter.rb:14:inconfigure_connection’
from /Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-
jdbc-adapter-1.0.2-java/lib/arjdbc/mysql/adapter.rb:385:in
initialize' from /Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord- jdbc-adapter-1.0.2-java/lib/arjdbc/jdbc/connection_methods.rb:6:innew’
from /Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-
jdbc-adapter-1.0.2-java/lib/arjdbc/jdbc/connection_methods.rb:6:in
jdbc_connection' from /Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord- jdbc-adapter-1.0.2-java/lib/arjdbc/mysql/connection_methods.rb:18:inmysql_connection’
from /Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/
activerecord-3.0.1/lib/active_record/connection_adapters/abstract/
connection_pool.rb:230:in new_connection' from /Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/ activerecord-3.0.1/lib/active_record/connection_adapters/abstract/ connection_pool.rb:238:incheckout_new_connection’
… 50 levels…
from file:/Library/Tomcat/apache-tomcat-6.0.29/webapps/RSM/WEB-INF/
lib/jruby-rack-1.0.3.jar!/vendor/rack-1.2.1/rack/builder.rb:46:in
initialize' from <script>:2:innew’
from :2

at org.jruby.rack.DefaultRackApplicationFactory
$4.init(DefaultRackApplicationFactory.java:184)
at
org.jruby.rack.DefaultRackApplicationFactory.getApplication(DefaultRackApplicationFactory.java:
59)
at
org.jruby.rack.PoolingRackApplicationFactory.getApplication(PoolingRackApplicationFactory.java:
94)
at
org.jruby.rack.servlet.DefaultServletDispatcher.process(DefaultServletDispatcher.java:
36)
at org.jruby.rack.RackFilter.doFilter(RackFilter.java:59)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:
235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:
206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:
233)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:
191)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:
127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:
102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:
109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:
298)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:
857)
at org.apache.coyote.http11.Http11Protocol
$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:
489)
at java.lang.Thread.run(Thread.java:680)
Caused by: org.jruby.exceptions.RaiseException:
ActiveRecord::JDBCError: Generated keys not requested. You need to
specify Statement.RETURN_GENERATED_KEYS to Statement.executeUpdate()
or Connection.prepareStatement().: SET SQL_AUTO_IS_NULL=0
at Kernel.raise(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/
activerecord-3.0.1/lib/active_record/connection_adapters/
abstract_adapter.rb:202)
at ActiveRecord::ConnectionAdapters::AbstractAdapter.log(/Library/
Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-jdbc-
adapter-1.0.2-java/lib/arjdbc/jdbc/adapter.rb:178)
at ActiveRecord::ConnectionAdapters::JdbcAdapter.execute(/Library/
Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-jdbc-
adapter-1.0.2-java/lib/arjdbc/mysql/adapter.rb:14)
at ArJdbc::MySQL.configure_connection(/Library/Tomcat/Home/webapps/
RSM/WEB-INF/gems/gems/activerecord-jdbc-adapter-1.0.2-java/lib/arjdbc/
mysql/adapter.rb:385)
at ActiveRecord::ConnectionAdapters::MysqlAdapter.initialize(/Library/
Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-jdbc-
adapter-1.0.2-java/lib/arjdbc/jdbc/connection_methods.rb:6)
at (unknown).new(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/
activerecord-jdbc-adapter-1.0.2-java/lib/arjdbc/jdbc/
connection_methods.rb:6)
at #Class:01x1aff2be8.jdbc_connection(/Library/Tomcat/Home/webapps/
RSM/WEB-INF/gems/gems/activerecord-jdbc-adapter-1.0.2-java/lib/arjdbc/
mysql/connection_methods.rb:18)
at #Class:01x1aff2be8.mysql_connection(/Library/Tomcat/Home/webapps/
RSM/WEB-INF/gems/gems/activerecord-3.0.1/lib/active_record/
connection_adapters/abstract/connection_pool.rb:230)
at ActiveRecord::ConnectionAdapters::ConnectionPool.new_connection(/
Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-3.0.1/
lib/active_record/connection_adapters/abstract/connection_pool.rb:238)
at
ActiveRecord::ConnectionAdapters::ConnectionPool.checkout_new_connection(/
Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-3.0.1/
lib/active_record/connection_adapters/abstract/connection_pool.rb:194)
at ActiveRecord::ConnectionAdapters::ConnectionPool.checkout(/Library/
Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-3.0.1/lib/
active_record/connection_adapters/abstract/connection_pool.rb:190)
at Kernel.loop(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/
activerecord-3.0.1/lib/active_record/connection_adapters/abstract/
connection_pool.rb:190)
at ActiveRecord::ConnectionAdapters::ConnectionPool.checkout(file:/
Library/Tomcat/apache-tomcat-6.0.29/webapps/RSM/WEB-INF/lib/jruby-
stdlib-1.5.3.jar!/META-INF/jruby.home/lib/ruby/1.8/monitor.rb:191)
at MonitorMixin.mon_synchronize(/Library/Tomcat/Home/webapps/RSM/WEB-
INF/gems/gems/activerecord-3.0.1/lib/active_record/connection_adapters/
abstract/connection_pool.rb:189)
at ActiveRecord::ConnectionAdapters::ConnectionPool.checkout(/Library/
Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-3.0.1/lib/
active_record/connection_adapters/abstract/connection_pool.rb:96)
at ActiveRecord::ConnectionAdapters::ConnectionPool.connection(/
Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-3.0.1/
lib/active_record/connection_adapters/abstract/connection_pool.rb:318)
at
ActiveRecord::ConnectionAdapters::ConnectionHandler.retrieve_connection(/
Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activerecord-3.0.1/
lib/active_record/connection_adapters/abstract/
connection_specification.rb:97)
at #Class:01x1aff2be8.retrieve_connection(/Library/Tomcat/Home/
webapps/RSM/WEB-INF/gems/gems/activerecord-3.0.1/lib/active_record/
connection_adapters/abstract/connection_specification.rb:89)
at #Class:01x1aff2be8.connection(/Library/Tomcat/Home/webapps/RSM/
WEB-INF/gems/gems/arel-1.0.1/lib/arel/engines/sql/engine.rb:9)
at Arel::Sql::Engine.connection(/Library/Tomcat/Home/webapps/RSM/WEB-
INF/gems/gems/arel-1.0.1/lib/arel/engines/sql/relations/table.rb:37)
at Arel::Table.initialize(/Library/Tomcat/Home/webapps/RSM/WEB-INF/
gems/gems/activerecord-3.0.1/lib/active_record/base.rb:850)
at (unknown).new(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/
activerecord-3.0.1/lib/active_record/base.rb:850)
at #Class:01x1aff2be8.arel_table(/Library/Tomcat/Home/webapps/RSM/
WEB-INF/gems/gems/activerecord-3.0.1/lib/active_record/base.rb:896)
at #Class:01x1aff2be8.relation(/Library/Tomcat/Home/webapps/RSM/WEB-
INF/gems/gems/activerecord-3.0.1/lib/active_record/named_scope.rb:32)
at ActiveRecord::NamedScope::ClassMethods.scoped(/Library/Tomcat/Home/
webapps/RSM/WEB-INF/gems/gems/activerecord-3.0.1/lib/active_record/
base.rb:441)
at #Class:01x1aff2be8.limit(/Library/Tomcat/apache-tomcat-6.0.29/
webapps/RSM/WEB-INF/app/models/artist.rb:5)
at (unknown).(unknown)(/Library/Tomcat/apache-tomcat-6.0.29/webapps/
RSM/WEB-INF/app/models/artist.rb:239)
at (unknown).(unknown)(/Library/Tomcat/apache-tomcat-6.0.29/webapps/
RSM/WEB-INF/app/models/artist.rb:239)
at Kernel.require(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/
activesupport-3.0.1/lib/active_support/dependencies.rb:239)
at ActiveSupport::Dependencies::Loadable.require(/Library/Tomcat/Home/
webapps/RSM/WEB-INF/gems/gems/activesupport-3.0.1/lib/active_support/
dependencies.rb:227)
at ActiveSupport::Dependencies::Loadable.load_dependency(/Library/
Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activesupport-3.0.1/lib/
active_support/dependencies.rb:239)
at ActiveSupport::Dependencies::Loadable.require(/Library/Tomcat/Home/
webapps/RSM/WEB-INF/gems/gems/activesupport-3.0.1/lib/active_support/
dependencies.rb:346)
at ActiveSupport::Dependencies.require_or_load(/Library/Tomcat/Home/
webapps/RSM/WEB-INF/gems/gems/activesupport-3.0.1/lib/active_support/
dependencies.rb:300)
at ActiveSupport::Dependencies.depend_on(/Library/Tomcat/Home/webapps/
RSM/WEB-INF/gems/gems/activesupport-3.0.1/lib/active_support/
dependencies.rb:216)
at ActiveSupport::Dependencies::Loadable.require_dependency(/Library/
Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/railties-3.0.1/lib/rails/
engine.rb:138)
at Rails::Engine.eager_load!(/Library/Tomcat/Home/webapps/RSM/WEB-INF/
gems/gems/railties-3.0.1/lib/rails/engine.rb:137)
at Array.each(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/
railties-3.0.1/lib/rails/engine.rb:137)
at Rails::Engine.eager_load!(/Library/Tomcat/Home/webapps/RSM/WEB-INF/
gems/gems/railties-3.0.1/lib/rails/engine.rb:135)
at Array.each(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/
railties-3.0.1/lib/rails/engine.rb:135)
at Rails::Engine.eager_load!(/Library/Tomcat/Home/webapps/RSM/WEB-INF/
gems/gems/railties-3.0.1/lib/rails/application.rb:108)
at Rails::Application.eager_load!(/Library/Tomcat/Home/webapps/RSM/
WEB-INF/gems/gems/railties-3.0.1/lib/rails/application/finisher.rb:41)
at (unknown).(unknown)(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/
gems/railties-3.0.1/lib/rails/initializable.rb:25)
at Kernel.instance_exec(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/
gems/railties-3.0.1/lib/rails/initializable.rb:25)
at Kernel.instance_exec(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/
gems/railties-3.0.1/lib/rails/initializable.rb:25)
at Rails::Initializable::Initializer.run(/Library/Tomcat/Home/webapps/
RSM/WEB-INF/gems/gems/railties-3.0.1/lib/rails/initializable.rb:50)
at Rails::Initializable.run_initializers(/Library/Tomcat/Home/webapps/
RSM/WEB-INF/gems/gems/railties-3.0.1/lib/rails/initializable.rb:49)
at Array.each(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/
railties-3.0.1/lib/rails/initializable.rb:49)
at Rails::Initializable.run_initializers(/Library/Tomcat/Home/webapps/
RSM/WEB-INF/gems/gems/railties-3.0.1/lib/rails/application.rb:134)
at Rails::Application.initialize!(/Library/Tomcat/Home/webapps/RSM/
WEB-INF/gems/gems/railties-3.0.1/lib/rails/application.rb:77)
at #Class:01x4856d15d.method_missing(/Library/Tomcat/apache-
tomcat-6.0.29/webapps/RSM/WEB-INF/config/environment.rb:9)
at (unknown).(unknown)(/Library/Tomcat/apache-tomcat-6.0.29/webapps/
RSM/WEB-INF/config/environment.rb:239)
at Kernel.require(/Library/Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/
activesupport-3.0.1/lib/active_support/dependencies.rb:239)
at ActiveSupport::Dependencies::Loadable.require(/Library/Tomcat/Home/
webapps/RSM/WEB-INF/gems/gems/activesupport-3.0.1/lib/active_support/
dependencies.rb:225)
at ActiveSupport::Dependencies::Loadable.load_dependency(/Library/
Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activesupport-3.0.1/lib/
active_support/dependencies.rb:591)
at ActiveSupport::Dependencies.new_constants_in(/Library/Tomcat/Home/
webapps/RSM/WEB-INF/gems/gems/activesupport-3.0.1/lib/active_support/
dependencies.rb:225)
at ActiveSupport::Dependencies::Loadable.load_dependency(/Library/
Tomcat/Home/webapps/RSM/WEB-INF/gems/gems/activesupport-3.0.1/lib/
active_support/dependencies.rb:239)
at ActiveSupport::Dependencies::Loadable.require(file:/Library/Tomcat/
apache-tomcat-6.0.29/webapps/RSM/WEB-INF/lib/jruby-rack-1.0.3.jar!/
jruby/rack/rails.rb:161)
at JRuby::Rack::RailsBooter::Rails3Environment.load_environment(file:/
Library/Tomcat/apache-tomcat-6.0.29/webapps/RSM/WEB-INF/lib/jruby-
rack-1.0.3.jar!/jruby/rack/rails.rb:165)
at JRuby::Rack::RailsBooter::Rails3Environment.to_app(file:/Library/
Tomcat/apache-tomcat-6.0.29/webapps/RSM/WEB-INF/lib/jruby-
rack-1.0.3.jar!/jruby/rack/rails.rb:186)
at #Class:01x49450f34.new(:2)
at (unknown).(unknown)(file:/Library/Tomcat/apache-tomcat-6.0.29/
webapps/RSM/WEB-INF/lib/jruby-rack-1.0.3.jar!/vendor/rack-1.2.1/rack/
builder.rb:46)
at Kernel.instance_eval(file:/Library/Tomcat/apache-tomcat-6.0.29/
webapps/RSM/WEB-INF/lib/jruby-rack-1.0.3.jar!/vendor/rack-1.2.1/rack/
builder.rb:46)
at Kernel.instance_eval(file:/Library/Tomcat/apache-tomcat-6.0.29/
webapps/RSM/WEB-INF/lib/jruby-rack-1.0.3.jar!/vendor/rack-1.2.1/rack/
builder.rb:46)
at Rack::Builder.initialize(:2)
at (unknown).new(:2)
at (unknown).(unknown)(:1)

Thanks.

MJW2529 · November 2, 2010, 7:37pm

I ran this against the production environment under WEBrick and it
works without error.
At the console I see the following output. Notice that it still runs
the SQL statement: SET SQL_AUTO_IS_NULL=0
But it doesn’t generate the same error that it does when I run it as a
war file.

$ jruby -S rails server -e production
=> Booting WEBrick
=> Rails 3.0.1 application starting in development on
http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2010-11-02 09:11:50] INFO WEBrick 1.3.1
[2010-11-02 09:11:50] INFO ruby 1.8.7 (2010-09-28) [java]
[2010-11-02 09:11:50] INFO WEBrick::HTTPServer#start: pid=46200
port=3000

Started GET “/albums/list” for 0:0:0:0:0:0:0:1%0 at Tue Nov 02
09:12:06 -0700 2010
SQL (1.0ms) SET SQL_AUTO_IS_NULL=0
Processing by AlbumsController#list as HTML
Album Load (10.0ms) SELECT albums.* FROM albums ORDER BY
albums.albumTitle ASC
Rendered albums/list.html.erb within layouts/application (220.0ms)
Completed 200 OK in 490ms (Views: 265.0ms | ActiveRecord: 11.0ms)

As for running this with jetty, I did get it installed but I’m not
familiar with maven and was not able to find any detailed instructions
for running it within the context of a jruby project. i.e. no idea
where the pom.xml file goes or what should be in it. The mvn package
command just gave me a bunch of errors.

MJW2529 · November 2, 2010, 9:34pm

OK - it is somehow related with your tomcat setup.

my application works with tomcat6 as well with jetty.

I also found your previous post. which was related to mysql-connector-
java-5.1.13-bin.jar

my WEB-INF/lib directory from the warfile has only jruby-complete.jar

jruby-rack.jar in it, everything else comes from the gems in WEB-INF/
gems.

next thought is that the tomcat has mysql-connector-java-5.1.13-
bin.jar in shared lib for warfiles ?

with regards, Kristian

MJW2529 · November 2, 2010, 11:16pm

OK, based on your previous email I’ve finally gotten to the bottom of
this.
I found a mysql-connector-java-5.1.13-bin.jar file in my
$CATALINA_HOME/lib directory.
After removing that file the error went away.
Kristian, Thank you very much for helping me solve this problem.

MJW2529 · November 2, 2010, 7:52pm

This does seem to be specific to Tomcat. I ran the same war file
under the jetty server and it ran without error.
I then reran it under Tomcat and I got the

SEVERE: Application Error
org.jruby.rack.RackInitializationException: ActiveRecord::JDBCError:
Generated keys not requested. You need to specify
Statement.RETURN_GENERATED_KEYS to Statement.executeUpdate() or
Connection.prepareStatement().: SET SQL_AUTO_IS_NULL=0

error again.

MJW2529 · November 3, 2010, 3:33am

great. and actually it is a drawback that you can not share jdbc
drivers between applications when using rails in at one application.
maybe future versions of jruby will allow this.

regards Kristian