m = Mutex.new
m.lock

t = Thread.new do
  m.lock
end

t.kill
t.join

import org.junit.Test;

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class ThreadInterruptTest {

   @Test
   public void interrupt() {
      final Lock lock = new ReentrantLock();
      lock.lock();

      Thread thread = new Thread(() -> {
         try {
            lock.lockInterruptibly();
         } catch (InterruptedException ie) {
            System.err.println("lock acquiring was interrupted");
            return;
         }
      });
      thread.start();

      thread.interrupt();

      try {
         thread.join();
      } catch (InterruptedException ie) {
         System.err.println("Can not join thread");
         return;
      }
   }
}

"main@1" prio=5 tid=0x1 nid=NA waiting
  java.lang.Thread.State: WAITING
	  at java.lang.Object.wait(Object.java:-1)
	  at java.lang.Thread.join(Thread.java:1260)
	  at org.jruby.internal.runtime.NativeThread.join(NativeThread.java:75)
	  at org.jruby.RubyThread.join(RubyThread.java:1079)
	  at org.jruby.RubyThread$INVOKER$i$0$1$join.call(RubyThread$INVOKER$i$0$1$join.gen:-1)

"Ruby-0-Thread-1: thread_kill.rb:4@6126" daemon prio=5 tid=0xe nid=NA waiting
  java.lang.Thread.State: WAITING
	  at sun.misc.Unsafe.park(Unsafe.java:-1)
	  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	  at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
	  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870)
	  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199)
	  at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:209)
	  at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:285)
	  at org.jruby.RubyThread.lock(RubyThread.java:2087)
	  at org.jruby.ext.thread.Mutex.lock(Mutex.java:95)
	  at org.jruby.ext.thread.Mutex$INVOKER$i$0$0$lock.call(Mutex$INVOKER$i$0$0$lock.gen:-1)