Environment

• JRuby 1.7.20.1
• Debian Jessie 3.16.7-ckt20 x86_64
• Oracle Java 1.8.0_92

This Problem occurs with Puppetserver, please also look at https://tickets.puppetlabs.com/browse/PUP-6409 for details in Puppet

Expected Behavior

JRuby shouldn't throw this error at all, as the Internal Object ID shouldn't influence the behavior of the program.

Actual Behavior

JRuby behaves as it should without any problems until the Object Id reached a value greater than Integer.MAX_VALUE. There is a line message += " in thread 0x" + Integer.toHexString(RubyInteger.fix2int(currentThread.id())); in org.jruby.RubyKernel which converts the Object ID to Integer.
If RubyBasicObject is the really source of the currentThread.id() it is a Long and can be too large

If I have missed something, let me know or also comment on the mentioned Puppet ticket if you like.