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Running Rake Tasks under Tomcat and JRuby

We've got our Rails (2.2.2) application running on a Tomcat7 server using warbler (1.2.1) and JRuby (1.5.6), but since we want to simplify deployment to multiple machines, we want to run the rake tasks, like db:migrate, under the tomcat WEB-INF location. We have packaged up the db folder along with all the migrations.

One way we've seen recommended online doesn't work:

java -jar lib/jruby-core-1.5.6.jar -S $JRUBY_HOME/bin/rake db:migrate RAILS_ENV=staging

/var/lib/jruby/bin/rake:9:in `require': no such file to load -- rubygems (LoadError)
        from /var/lib/jruby/bin/rake:9

After adding to ENV:

GEM_HOME=$JRUBY_HOME/lib/ruby/gems/1.8
RUBYLIB=$JRUBY_HOME/lib/ruby/site_ruby/1.8

The same command gives:

/var/lib/jruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:32 warning: already initialized constant RAKEVERSION
/var/lib/jruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require': no such file to load -- fileutils (LoadError)
        from /var/lib/jruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
        from /var/lib/jruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:35
        from /var/lib/jruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:31:in `require'
        from /var/lib/jruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
        from /var/lib/jruby-1.5.6/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:29
        from /var/lib/jruby-1.5.6/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:19:in `load'
        from /var/lib/jruby/bin/rake:19

And if I just run:

jruby -S $JRUBY_HOME/bin/rake db:migrate RAILS_ENV=staging

I get a big callstack of gem errors resulting from the vendorized gems. (OutOfMemoryError, NUllPointerException, etc.. which isn't actually consistent between runs).

This question (How do I run rake rake tasks in a rails app which is served by tomcat with jruby war deployment?) had no bites on it either. Any suggestions are appreciated.

Cheers.

Solution

  • Turns out this command works 

    java -jar /var/lib/jruby/jruby-complete-1.5.6.jar -S rake  db:migrate RAILS_ENV=staging

    as long as I download the jruby-complete jar and make sure I have the ENV:

    RUBYLIB=$JRUBY_HOME/lib/ruby/site_ruby/1.8
GEM_HOME=$JRUBY_HOME/lib/ruby/gems/1.8