ThreadPoolExecutor#kill will wait_for_termination in JRuby; ensure TimerSet timer thread shuts down cleanly
#640
| Job | Run time |
|---|---|
| 3m 42s | |
| 3m 59s | |
| 3m 15s | |
| 3m 37s | |
| 3m 33s | |
| 3m 19s | |
| 5m 32s | |
| 3m 21s | |
| 4m 17s | |
| 3m 22s | |
| 3m 34s | |
| 3m 32s | |
| 3m 22s | |
| 3m 31s | |
| 3m 17s | |
| 4m 27s | |
| 59m 40s |