Freeze occurs in the following operation in 1.3.1_0X..

REPRODUCE:
 To download concurrent.zip and invoke repro.csh
  ( Set dir. where java command exists to PATH env. variable
    before launch "repro.csh")

NOTE:
panel-operation.JPG

I also attached .jpg file which shows operation for panel.
The "step" in the jpg file is corresponding to the following "Step".
<< Operation >>
Step1. Click "no classes"
Step2. Click "waitfreeQueue"
Step3. Set "128k calls per thread" in combo box
Step4. Set "1M iterations per barrier" in combo box.
Step5. Click "start"