LoadError after upgrading to R109

we’ve recently upgraded our staging environment from R106 to R109.
we are using the batch pipeline, executing it hourly via cron.
since the upgrade to R109, around 1/3 of these runs fail with the following error message:

uri:classloader:/gems/avro-1.8.1/lib/avro/schema.rb:350: warning: constant ::Fixnum is deprecated
uri:classloader:/gems/json-schema-2.7.0/lib/json-schema/util/array_set.rb:18: warning: constant ::Fixnum is deprecated
D, [2018-10-08T04:04:21.086677 #4964] DEBUG – : Initializing EMR jobflow
LoadError: load error: META-INF/main – java.lang.StackOverflowError: null
require at org/jruby/RubyKernel.java:970
require at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:59

at :3 ERROR: org.jruby.embed.EvalFailedException: (LoadError) load error: META-INF/main -- java.lang.StackOverflowError: null

any idea what is the reason for it & how to solve it?
we are holding back the upgrade of the production env till it’ll be solved.

thabks a lot in advance for your help!

Hi @morans,

What version of the EmrEtlRunner are you using? Have you downloaded the appropriate release?

Looking at the error message, it seems you are still using R108 which has a bug (more info here).

To fix the problem, you can:

Hope this helps.

Thank you Egor!
You are abselutely right, I was using R108 (somehow missed that R109 had a new binary).