m.disconnect("handler blocked", true)
	}
}

func (m *muxServer) unblockSend(seq uint32) {
	if !m.checkSeq(seq) {
		return
	}
	m.recvMu.Lock()
	defer m.recvMu.Unlock()
	if m.outBlock == nil {
		// Closed
		return
	}
	select {
	case m.outBlock <- struct{}{}:
	default:
		gridLogIf(m.ctx, errors.New("output unblocked overflow"))
	}
}

func (m *muxServer) ping(seq uint32) pongMsg {

	for range available {
		m.outBlock <- struct{}{}
	}
	m.acked = true
}

func (m *muxClient) unblockSend(seq uint32) {
	if !m.checkSeq(seq) {
		return
	}
	select {
	case m.outBlock <- struct{}{}:
	default:
		gridLogIf(m.ctx, errors.New("output unblocked overflow"))
	}
}

func (m *muxClient) pong(msg pongMsg) {
	if msg.NotFound || msg.Err != nil {

		}
		// We can expect to receive unblocks for closed muxes
		return
	}
	v.unblockSend(m.Seq)
}

func (c *Connection) handleUnblockSrvMux(m message) {
	if m.Payload != nil {
		PutByteBuffer(m.Payload)
	}
	m.Payload = nil
	if v, ok := c.inStream.Load(m.MuxID); ok {
		v.unblockSend(m.Seq)
		return
	}
	// We can expect to receive unblocks for closed muxes
	if debugPrint {

	// OpMuxServerMsg contains a message to a server Mux
	OpMuxServerMsg

	// OpUnblockSrvMux contains a message that a server mux is unblocked with one.
	// Only Stateful streams has flow control.
	OpUnblockSrvMux

	// OpUnblockClMux contains a message that a client mux is unblocked with one.
	// Only Stateful streams has flow control.
	OpUnblockClMux

	// OpAckMux acknowledges a mux was created.
	OpAckMux

     *
     * @param sourceIp the IP to unblock
     * @return true if IP was unblocked, false if not found
     */
    public boolean unblockIp(String sourceIp) {
        IpAttempts ip = ipAttempts.get(sourceIp);
        if (ip != null) {
            ip.reset();
            log.info("Manually unblocked IP: {}", sourceIp);
            return true;
        }
        return false;
    }

		t.Error("unexpected unblocking")
	case <-time.After(100 * time.Millisecond):
	}

	// unlock
	if err = dupl.Close(); err != nil {
		t.Fatal(err)
	}

	// the previously blocked routine should be unblocked
	select {
	case <-locked:
	case <-time.After(1 * time.Second):
		t.Error("unexpected blocking")
	}

    }

    /**
     * Unblock an IP address.
     * @param ip the IP address to unblock
     */
    public void unblockIp(final String ip) {
        blockedIps.invalidate(ip);
        logger.info("IP unblocked: ip={}", ip);
    }

    /**
     * Get the number of currently blocked IPs.
     * Note: This may include expired entries not yet evicted.
     * @return the count of blocked IPs
     */

// from a placeholder node "arg_tensor_enqueue_<tensor_id>".
//
// `tensor` is still owned by the caller. This call will be blocked if the queue
// has reached its capacity, and will be unblocked when the queued tensors again
// drop below the capacity due to dequeuing.
//
// Tensors are dequeued via the corresponding TF dequeue op.
// TODO(hongm): Add support for `timeout_ms`.

          }
        };
    f.set("foo");
  }

  // Regression test for a case where we would fail to execute listeners immediately on done futures
  // this would be observable from a waiter that was just unblocked.
  public void testListenersExecuteImmediately_afterWaiterWakesUp() throws Exception {
    AbstractFuture<String> f =
        new AbstractFuture<String>() {
          @Override
          protected void afterDone() {

          }
        };
    f.set("foo");
  }

  // Regression test for a case where we would fail to execute listeners immediately on done futures
  // this would be observable from a waiter that was just unblocked.
  public void testListenersExecuteImmediately_afterWaiterWakesUp() throws Exception {
    AbstractFuture<String> f =
        new AbstractFuture<String>() {
          @Override
          protected void afterDone() {