Tony Arcieri created JRUBY-6314:
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Summary: Deadlock when using Queue to send messages between threads
Key: JRUBY-6314
URL: https://jira.codehaus.org/browse/JRUBY-6314
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.6.5, JRuby 1.6.6
Environment: jruby 1.6.5 (ruby-1.9.2-p136) (2011-10-25 9dcd388) (Java
HotSpot(TM) 64-Bit Server VM 1.6.0_29) [darwin-x86_64-java]
jruby 1.6.6.dev (ruby-1.9.2-p312) (2012-01-03 bdaf760) (Java HotSpot(TM) 64-Bit
Server VM 1.6.0_29) [darwin-x86_64-java]
Reporter: Tony Arcieri
I wrote a small script to benchmark the performance of the Queue class:
https://gist.github.com/1556385
Running this script will sporadically (~50% of the time) cause a complete
deadlock of the JVM, as in:
- Won't respond to ^\ or any signals except SIGKILL (e.g. SIGINT, SIGSTOP)
- Can't attach with tools like VisualVM or jstack: attach: task_for_pid(32017)
failed (5)
I can't reproduce this problem on a newer OpenJDK build:
- jruby 1.6.5 (ruby-1.9.2-p136) (2011-10-25 9dcd388) (OpenJDK 64-Bit Server VM
1.8.0-b14) [darwin-amd64-java]
- jruby 1.6.6.dev (ruby-1.9.2-p312) (2012-01-03 bdaf760) (OpenJDK 64-Bit Server
VM 1.8.0-b14) [darwin-amd64-java]
- jruby 1.7.0.dev (ruby-1.9.3-p0) (2011-12-30 ba99e33) (OpenJDK 64-Bit Server
VM 1.8.0-b14) [darwin-amd64-java]
This works 100% of the time without issues
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