src/java.base/share/classes/sun/nio/ch/AsynchronousChannelGroupImpl.java

*** 74,84 ****
      {
          super(provider);
          this.pool = pool;
  
          if (pool.isFixedThreadPool()) {
!             taskQueue = new ConcurrentLinkedQueue<Runnable>();
          } else {
              taskQueue = null;   // not used
          }
  
          // use default thread factory as thread should not be visible to
--- 74,84 ----
      {
          super(provider);
          this.pool = pool;
  
          if (pool.isFixedThreadPool()) {
!             taskQueue = new ConcurrentLinkedQueue<>();
          } else {
              taskQueue = null;   // not used
          }
  
          // use default thread factory as thread should not be visible to
*** 113,123 ****
              }
          };
      }
  
      private void startInternalThread(final Runnable task) {
!         AccessController.doPrivileged(new PrivilegedAction<Void>() {
              @Override
              public Void run() {
                  // internal threads should not be visible to application so
                  // cannot use user-supplied thread factory
                  ThreadPool.defaultThreadFactory().newThread(task).start();
--- 113,123 ----
              }
          };
      }
  
      private void startInternalThread(final Runnable task) {
!         AccessController.doPrivileged(new PrivilegedAction<>() {
              @Override
              public Void run() {
                  // internal threads should not be visible to application so
                  // cannot use user-supplied thread factory
                  ThreadPool.defaultThreadFactory().newThread(task).start();
*** 244,254 ****
       * Shutdown all tasks waiting for I/O events.
       */
      abstract void shutdownHandlerTasks();
  
      private void shutdownExecutors() {
!         AccessController.doPrivileged(new PrivilegedAction<Void>() {
              public Void run() {
                  pool.executor().shutdown();
                  timeoutExecutor.shutdown();
                  return null;
              }
--- 244,254 ----
       * Shutdown all tasks waiting for I/O events.
       */
      abstract void shutdownHandlerTasks();
  
      private void shutdownExecutors() {
!         AccessController.doPrivileged(new PrivilegedAction<>() {
              public Void run() {
                  pool.executor().shutdown();
                  timeoutExecutor.shutdown();
                  return null;
              }
*** 321,331 ****
              final AccessControlContext acc = AccessController.getContext();
              final Runnable delegate = task;
              task = new Runnable() {
                  @Override
                  public void run() {
!                     AccessController.doPrivileged(new PrivilegedAction<Void>() {
                          @Override
                          public Void run() {
                              delegate.run();
                              return null;
                          }
--- 321,331 ----
              final AccessControlContext acc = AccessController.getContext();
              final Runnable delegate = task;
              task = new Runnable() {
                  @Override
                  public void run() {
!                     AccessController.doPrivileged(new PrivilegedAction<>() {
                          @Override
                          public Void run() {
                              delegate.run();
                              return null;
                          }