The ways to generate a thread dump differ depending on the platform:

• Windows systems
  • Press Ctrl-Break from the command console you used to start the VM.
• Unix systems
  • Press Ctrl-\ in the terminal console you used to start the VM.
  • kill -QUIT process_id where process_id is the process number of the respective java process.

Please keep in mind that you should never copy the thread dump into the description field of an issue report. Thread dumps tend to be tens to hundreds lines of text long and the lines are typically wide and won't wrap nicely in the description field. You should always attach thread dumps to issues as attachments of type text/plain.