WrongMethodTypeException after upgrading to Jruby 9.4.12.0

[StockRover]

After upgrading from JRuby 9.2.20.1 and running inside Apache Tomcat any file upload form fails with this error

17-Apr-2025 15:13:17.565 INFO [main] org.apache.catalina.core.ApplicationContext.log jruby 9.4.12.0 (3.1.4) 2025-02-11 f4ab75096a OpenJDK 64-Bit Server VM 24.0.1+9-30 on 24.0.1+9-30 +jit [x86_64-mswin32]
17-Apr-2025 15:13:17.566 INFO [main] org.apache.catalina.core.ApplicationContext.log using a shared (thread-safe) runtime
17-Apr-2025 15:14:46.718 INFO [https-openssl-nio-443-exec-3] org.apache.catalina.core.ApplicationContext.log resetting rack response due exception
17-Apr-2025 15:14:47.705 SEVERE [https-openssl-nio-443-exec-3] org.apache.catalina.core.ApplicationContext.log error app failed to handle exception: java.lang.invoke.WrongMethodTypeException: handle's method type (RubyString,ByteList,int)int but found (ByteList,int)int
org.jruby.exceptions.NoMethodError: (NoMethodError) undefined method `bytesize' for Rack::Utils:Module
at RUBY.call(uri:classloader:/jruby/rack/error_app/show_status.rb:30)
at org.jruby.rack.ext.Servlet.call(org/jruby/rack/ext/Servlet.java:86)

I wouldn't be surprised if the bug is some misconfiguration on my end but I have no idea where to look. I've tried with rack versions 1.1.21 and 1.2.2.

[headius]

Perhaps it is now finding a different version of the class in classpath?

[chadlwilson]

This was fixed in #252 but still not released. 1.2.2 is not stable IMHO. 1.1.21 might be OK, but probably depends which Rack version you're trying to load with it.

We need a 1.2.3 or 1.3.0 release off master, really.

[StockRover]

Until a new release is ready is there any way to monkey patch my environment to work around this issue? I tried the patch posted here without success
websocket-rails/websocket-rails#423

[StockRover]

Nevermind, I did find a 1.2.2 jar was lingering on Tomcat. Once I truly ran 1.1.21 it succeeded.

[chadlwilson]

If you consume jruby-rack via jar and you're interested in trialing with a temporary fork to give feedback you could have a go with https://github.com/gocd-contrib/jruby-rack (1.2.3.9 is basically the same as master here, plus #273 merged).

Probably not a good idea to depend on it for production but it'd help us figure out if there are other 1.2.x issues to solve in different servlet environments.