Rails failing on Tomcat with JRuby 9.1.12

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Rails failing on Tomcat with JRuby 9.1.12

F2Andy
I am having problems getting JRuby 9.1.12 to run my Rails project. I was previously on 9.1.2, and that works fine. All I have done is updated JRuby, and now it fails.

To investigate, I created a test project, first using JRuby 9.1.2:

rails new testy --database postgresql
cd testy
rails g scaffold
Location name:string



Location is a table in an existing database, so quicker for testing. I deleted the migration, copied across database.yml from my project, and edited secret.yml so it uses the same key as the tests. Then:

rake test
warble



Then I put the .war into Tomcat and it works fine. So then JRuby 9.1.12:
 
gem uninstall -v 9.1.2 jruby-jars
gem install
-v 9.1.12 jruby-jars
warble



I stop Tomcat, delete the old files, and put this new war in. Now I see this when going to a page in testy:
 
org.jruby.rack.RackInitializationException: java.lang.NullPointerException
    at org
.jruby.rack.RackInitializationException.wrap(RackInitializationException.java:31)
    at org
.jruby.rack.RackApplicationFactoryDecorator.init(RackApplicationFactoryDecorator.java:104)
    at org
.jruby.rack.RackServletContextListener.contextInitialized(RackServletContextListener.java:50)
    at org
.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4853)
    at org
.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314)
    at org
.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
    at org
.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:753)
    at org
.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:729)
    at org
.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
    at org
.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:976)
    at org
.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1853)
    at java
.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java
.util.concurrent.FutureTask.run(Unknown Source)
    at java
.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java
.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java
.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
    at java
.lang.String.getBytes(Unknown Source)
    at org
.jruby.ast.SymbolNode.<init>(SymbolNode.java:54)
    at org
.jruby.parser.ParserSupport.asSymbol(ParserSupport.java:975)
    at org
.jruby.parser.RubyParser$379.execute(RubyParser.java:4286)
    at org
.jruby.parser.RubyParser.yyparse(RubyParser.java:1677)
    at org
.jruby.parser.RubyParser.yyparse(RubyParser.java:1568)
    at org
.jruby.parser.RubyParser.parse(RubyParser.java:5365)
    at org
.jruby.parser.Parser.parse(Parser.java:128)
    at org
.jruby.parser.Parser.parse(Parser.java:77)
    at org
.jruby.Ruby.parseEval(Ruby.java:2722)
    at org
.jruby.ir.interpreter.Interpreter.prepareIC(Interpreter.java:211)
    at org
.jruby.ir.interpreter.Interpreter.evalCommon(Interpreter.java:167)
    at org
.jruby.ir.interpreter.Interpreter.evalWithBinding(Interpreter.java:200)
    at org
.jruby.RubyKernel.evalCommon(RubyKernel.java:1033)
    at org
.jruby.RubyKernel.eval19(RubyKernel.java:1000)
    at org
.jruby.RubyKernel$INVOKER$s$0$3$eval19.call(RubyKernel$INVOKER$s$0$3$eval19.gen)
 
...


 
I have Googled the error, but found nothing, so I am a bit stuck! I am using Java 1.8.0.131 (32 bit), Tomcat 8.0.45 (32 bit), Warbler 2.0.4 on Windows 7 Pro.

Any help or suggestions appreciated.
 
Here are the gems from gemfile.lock:
 
GEM
  remote
: https://rubygems.org/
  specs
:
    actionmailer
(4.2.9)
      actionpack
(= 4.2.9)
      actionview
(= 4.2.9)
      activejob
(= 4.2.9)
      mail
(~> 2.5, >= 2.5.4)
      rails
-dom-testing (~> 1.0, >= 1.0.5)
    actionpack
(4.2.9)
      actionview
(= 4.2.9)
      activesupport
(= 4.2.9)
      rack
(~> 1.6)
      rack
-test (~> 0.6.2)
      rails
-dom-testing (~> 1.0, >= 1.0.5)
      rails
-html-sanitizer (~> 1.0, >= 1.0.2)
    actionview
(4.2.9)
      activesupport
(= 4.2.9)
      builder
(~> 3.1)
      erubis
(~> 2.7.0)
      rails
-dom-testing (~> 1.0, >= 1.0.5)
      rails
-html-sanitizer (~> 1.0, >= 1.0.3)
    activejob
(4.2.9)
      activesupport
(= 4.2.9)
      globalid
(>= 0.3.0)
    activemodel
(4.2.9)
      activesupport
(= 4.2.9)
      builder
(~> 3.1)
    activerecord
(4.2.9)
      activemodel
(= 4.2.9)
      activesupport
(= 4.2.9)
      arel
(~> 6.0)
    activerecord
-jdbc-adapter (1.3.23)
      activerecord
(>= 2.2, < 5.0)
    activerecord
-jdbcpostgresql-adapter (1.3.23)
      activerecord
-jdbc-adapter (~> 1.3.23)
      jdbc
-postgres (>= 9.1)
    activesupport
(4.2.9)
      i18n
(~> 0.7)
      minitest
(~> 5.1)
      thread_safe
(~> 0.3, >= 0.3.4)
      tzinfo
(~> 1.1)
    arel
(6.0.4)
    builder
(3.2.3)
    coffee
-rails (4.1.1)
      coffee
-script (>= 2.2.0)
      railties
(>= 4.0.0, < 5.1.x)
    coffee
-script (2.4.1)
      coffee
-script-source
      execjs
    coffee
-script-source (1.12.2)
    concurrent
-ruby (1.0.5-java)
    erubis
(2.7.0)
    execjs
(2.7.0)
    ffi
(1.9.18-java)
    globalid
(0.4.0)
      activesupport
(>= 4.2.0)
    i18n
(0.8.6)
    jbuilder
(2.7.0)
      activesupport
(>= 4.2.0)
      multi_json
(>= 1.2)
    jdbc
-postgres (9.4.1206)
    jquery
-rails (4.3.1)
      rails
-dom-testing (>= 1, < 3)
      railties
(>= 4.2.0)
      thor
(>= 0.14, < 2.0)
    json
(1.8.6-java)
    loofah
(2.0.3)
      nokogiri
(>= 1.5.9)
    mail
(2.6.6)
      mime
-types (>= 1.16, < 4)
    mime
-types (3.1)
      mime
-types-data (~> 3.2015)
    mime
-types-data (3.2016.0521)
    minitest
(5.10.2)
    multi_json
(1.12.1)
    nokogiri
(1.8.0-java)
    rack
(1.6.8)
    rack
-test (0.6.3)
      rack
(>= 1.0)
    rails
(4.2.9)
      actionmailer
(= 4.2.9)
      actionpack
(= 4.2.9)
      actionview
(= 4.2.9)
      activejob
(= 4.2.9)
      activemodel
(= 4.2.9)
      activerecord
(= 4.2.9)
      activesupport
(= 4.2.9)
      bundler
(>= 1.3.0, < 2.0)
      railties
(= 4.2.9)
      sprockets
-rails
    rails
-deprecated_sanitizer (1.0.3)
      activesupport
(>= 4.2.0.alpha)
    rails
-dom-testing (1.0.8)
      activesupport
(>= 4.2.0.beta, < 5.0)
      nokogiri
(~> 1.6)
      rails
-deprecated_sanitizer (>= 1.0.1)
    rails
-html-sanitizer (1.0.3)
      loofah
(~> 2.0)
    railties
(4.2.9)
      actionpack
(= 4.2.9)
      activesupport
(= 4.2.9)
      rake
(>= 0.8.7)
      thor
(>= 0.18.1, < 2.0)
    rake
(12.0.0)
    rb
-fsevent (0.10.2)
    rb
-inotify (0.9.10)
      ffi
(>= 0.5.0, < 2)
    rdoc
(4.3.0)
    sass
(3.5.1)
      sass
-listen (~> 4.0.0)
    sass
-listen (4.0.0)
      rb
-fsevent (~> 0.9, >= 0.9.4)
      rb
-inotify (~> 0.9, >= 0.9.7)
    sass
-rails (5.0.6)
      railties
(>= 4.0.0, < 6)
      sass
(~> 3.1)
      sprockets
(>= 2.8, < 4.0)
      sprockets
-rails (>= 2.0, < 4.0)
      tilt
(>= 1.1, < 3)
    sdoc
(0.4.2)
      json
(~> 1.7, >= 1.7.7)
      rdoc
(~> 4.0)
    sprockets
(3.7.1)
      concurrent
-ruby (~> 1.0)
      rack
(> 1, < 3)
    sprockets
-rails (3.2.0)
      actionpack
(>= 4.0)
      activesupport
(>= 4.0)
      sprockets
(>= 3.0.0)
    therubyrhino
(2.0.4)
      therubyrhino_jar
(>= 1.7.3)
    therubyrhino_jar
(1.7.6)
    thor
(0.19.4)
    thread_safe
(0.3.6-java)
    tilt
(2.0.7)
    turbolinks
(5.0.1)
      turbolinks
-source (~> 5)
    turbolinks
-source (5.0.3)
    tzinfo
(1.2.3)
      thread_safe
(~> 0.1)
    tzinfo
-data (1.2017.2)
      tzinfo
(>= 1.0.0)
    uglifier
(3.2.0)
      execjs
(>= 0.3.0, < 3)

PLATFORMS
  java

DEPENDENCIES
  activerecord
-jdbcpostgresql-adapter
  coffee
-rails (~> 4.1.0)
  jbuilder
(~> 2.0)
  jquery
-rails
  rails
(= 4.2.9)
  sass
-rails (~> 5.0)
  sdoc
(~> 0.4.0)
  therubyrhino
  turbolinks
  tzinfo
-data
  uglifier
(>= 1.3.0)

BUNDLED WITH
   
1.15.1


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