private ReentrantLock lockA;
  private ReentrantLock lockB;
  private ReentrantLock lockC;
  private ReentrantReadWriteLock.ReadLock readLockA;
  private ReentrantReadWriteLock.ReadLock readLockB;
  private ReentrantReadWriteLock.ReadLock readLockC;
  private ReentrantReadWriteLock.WriteLock writeLockA;
  private ReentrantReadWriteLock.WriteLock writeLockB;
  private ReentrantReadWriteLock.WriteLock writeLockC;

  private ReentrantLock lockA;
  private ReentrantLock lockB;
  private ReentrantLock lockC;
  private ReentrantReadWriteLock.ReadLock readLockA;
  private ReentrantReadWriteLock.ReadLock readLockB;
  private ReentrantReadWriteLock.ReadLock readLockC;
  private ReentrantReadWriteLock.WriteLock writeLockA;
  private ReentrantReadWriteLock.WriteLock writeLockB;
  private ReentrantReadWriteLock.WriteLock writeLockC;

    Object key = new Object();
    Lock readLock = striped.get(key).readLock();
    WeakReference<Object> garbage = new WeakReference<>(new Object());
    GcFinalization.awaitClear(garbage);
    Lock writeLock = striped.get(key).writeLock();
    readLock.lock();
    assertFalse(writeLock.tryLock());
    readLock.unlock();
  }

    Object key = new Object();
    Lock readLock = striped.get(key).readLock();
    WeakReference<Object> garbage = new WeakReference<>(new Object());
    GcFinalization.awaitClear(garbage);
    Lock writeLock = striped.get(key).writeLock();
    readLock.lock();
    assertFalse(writeLock.tryLock());
    readLock.unlock();
  }

      super(fair);
      this.readLock = new CycleDetectingReentrantReadLock(this);
      this.writeLock = new CycleDetectingReentrantWriteLock(this);
      this.lockGraphNode = Preconditions.checkNotNull(lockGraphNode);
    }

    ///// Overridden ReentrantReadWriteLock methods. /////

    @Override
    public ReadLock readLock() {
      return readLock;
    }

    @Override

    private final ReadWriteLock delegate;

    WeakSafeReadWriteLock() {
      this.delegate = new ReentrantReadWriteLock();
    }

    @Override
    public Lock readLock() {
      return new WeakSafeLock(delegate.readLock(), this);
    }

    @Override
    public Lock writeLock() {
      return new WeakSafeLock(delegate.writeLock(), this);
    }
  }

The reader thread must never run application-layer code. Otherwise one slow stream can hold up the entire connection.

   * This covers a bug where if a listener was installed that would stop the manager if any service
   * fails and something failed during startup before service.start was called on all the services,
   * then awaitStopped would deadlock due to an IllegalStateException that was thrown when trying to
   * stop the timer(!).
   */
  public void testFailStart_stopOthers() throws TimeoutException {
    Service a = new FailStartService();

## Changelog since v1.6.0

### Other notable changes

* Fix a deadlock in kubeadm master initialization. ([#43835](https://github.com/kubernetes/kubernetes/pull/43835), [@mikedanese](https://github.com/mikedanese))

* Fixed potential deadlock when deleting CustomResourceDefinition for custom resources with finalizers. ([#60542](https://github.com/kubernetes/kubernetes/pull/60542), [@liggitt](https://github.com/liggitt))