Intermittent, improper "undefined method" such as: Undefined method id? for
module '#<Module:0x64cd6dca>'
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Key: JRUBY-6256
URL: https://jira.codehaus.org/browse/JRUBY-6256
Project: JRuby
Issue Type: Bug
Components: Application Error, Rails WAR Deployment
Affects Versions: JRuby 1.6.5
Environment: Rails 3.0.10, Jruby 1.6.5, Warbler 1.3.2, Tomcat 7, Mysql
5.1
Reporter: David Wood
Although our application appears to work when manually tested, an automated
test that makes concurrent requests to Tomcat running our Warbled WAR sometimes
produces idiosyncratic problems from within ActiveRecord, such as:
Undefined method id? for module '#<Module:0x64cd6dca>'
{code}
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:294:in
`(eval)'
org/jruby/RubyModule.java:2254:in `module_eval'
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:290:in
`define_attribute_methods'
org/jruby/RubyArray.java:1612:in `each'
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:279:in
`define_attribute_methods'
org/jruby/RubyArray.java:1612:in `each'
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:278:in
`define_attribute_methods'
gems/gems/activerecord-3.0.10/lib/active_record/attribute_methods.rb:13:in
`define_attribute_methods'
gems/gems/activerecord-3.0.10/lib/active_record/attribute_methods.rb:41:in
`method_missing'
...<a line of our code that simply accesses a string field on an already loaded
active record model object>...
{code}
These errors often seem to happen at the beginning of our tests (suggesting a
possible race between lazy initialization on a first request and following
requests that come too soon afterwards), though I cannot yet confirm they never
happens after test start.
That could mean this is possibly related to JRUBY-6254.
The problem is quite common - we basically see some number of these on every
test run.
Some additional examples:
Undefined method id_before_type_cast for module '#<Module:0x64cd6dca>'
{code}
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:294:in
`(eval)'
org/jruby/RubyModule.java:2254:in `module_eval'
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:290:in
`define_attribute_methods'
org/jruby/RubyArray.java:1612:in `each'
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:279:in
`define_attribute_methods'
org/jruby/RubyArray.java:1612:in `each'
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:278:in
`define_attribute_methods'
gems/gems/activerecord-3.0.10/lib/active_record/attribute_methods.rb:13:in
`define_attribute_methods'
gems/gems/activerecord-3.0.10/lib/active_record/attribute_methods.rb:41:in
`method_missing'
...<NOTE that this is generated from the *exact same* line in our code as the
different error above>...
{code}
And another example:
Undefined method <name of a method we defined>! for module '#<Module:0xadfa6>'
{code}
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:294:in
`(eval)'
org/jruby/RubyModule.java:2254:in `module_eval'
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:290:in
`define_attribute_methods'
org/jruby/RubyArray.java:1612:in `each'
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:279:in
`define_attribute_methods'
org/jruby/RubyArray.java:1612:in `each'
gems/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:278:in
`define_attribute_methods'
gems/gems/activerecord-3.0.10/lib/active_record/attribute_methods.rb:13:in
`define_attribute_methods'
gems/gems/activerecord-3.0.10/lib/active_record/attribute_methods.rb:41:in
`method_missing'
...<in our code, we modify a field on an already loaded activerecord object;
note that <name of a method we defined>! is - or should be - defined on that
object's class.>...
{code}
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