Examples of java.net.ConnectException

java.net.ConnectException
Signals that an error occurred while attempting to connect a socket to a remote address and port. Typically, the connection was refused remotely (e.g., no process is listening on the remote address/port). @since JDK1.1

    // daemon is down, so we'll treat it like connection refused.
    if (socket.getLocalPort() == socket.getPort() &&
        socket.getLocalAddress().equals(socket.getInetAddress())) {
      LOG.info("Detected a loopback TCP socket, disconnecting it");
      socket.close();
      throw new ConnectException(
        "Localhost targeted connection resulted in a loopback. " +
        "No daemon is listening on the target port.");
    }
  }

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   */
  private IOException wrapException(InetSocketAddress addr,
                                         IOException exception) {
    if (exception instanceof ConnectException) {
      //connection refused; include the host:port in the error
      return (ConnectException)new ConnectException(
           "Call to " + addr + " failed on connection exception: " + exception)
                    .initCause(exception);
    } else if (exception instanceof SocketTimeoutException) {
      return (SocketTimeoutException)new SocketTimeoutException(
           "Call to " + addr + " failed on socket timeout exception: "

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  @SuppressWarnings({"ThrowableInstanceNeverThrown"})
  protected IOException wrapException(InetSocketAddress addr,
                                         IOException exception) {
    if (exception instanceof ConnectException) {
      //connection refused; include the host:port in the error
      return (ConnectException)new ConnectException(
           "Call to " + addr + " failed on connection exception: " + exception)
                    .initCause(exception);
    } else if (exception instanceof SocketTimeoutException) {
      return (SocketTimeoutException)new SocketTimeoutException(
           "Call to " + addr + " failed on socket timeout exception: "

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                        ConnectionPoolTimeoutException {
                    allocatedConnection = new ClientConnAdapterMockup(ConnMan2.this) {
                        @Override
                        public void open(HttpRoute route, HttpContext context,
                                HttpParams params) throws IOException {
                            throw new ConnectException();
                        }
                    };
                    return allocatedConnection;
                }
            };

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                continue;


            ConnectionRequest entry = (ConnectionRequest) key.attachment();


            if (currentTime >= entry.deadline) {
                entry.setException(new ConnectException());
                try {
                    key.channel().close();
                } catch (IOException e) {
                    ExceptionMonitor.getInstance().exceptionCaught(e);
                } finally {

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    client.connect(host, port);
    int reply = client.getReplyCode();
    if (!FTPReply.isPositiveCompletion(reply)) {
      throw NetUtils.wrapException(host, port,
                   NetUtils.UNKNOWN_HOST, 0,
                   new ConnectException("Server response " + reply));
    } else if (client.login(user, password)) {
      client.setFileTransferMode(FTP.BLOCK_TRANSFER_MODE);
      client.setFileType(FTP.BINARY_FILE_TYPE);
      client.setBufferSize(DEFAULT_BUFFER_SIZE);
    } else {

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    assertFalse(NetUtils.isLocalAddress(InetAddress.getByName("8.8.8.8")));
  }


  @Test
  public void testWrapConnectException() throws Throwable {
    IOException e = new ConnectException("failed");
    IOException wrapped = verifyExceptionClass(e, ConnectException.class);
    assertInException(wrapped, "failed");
    assertWikified(wrapped);
    assertInException(wrapped, "localhost");
    assertRemoteDetailsIncluded(wrapped);

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  @SuppressWarnings({"ThrowableInstanceNeverThrown"})
  protected IOException wrapException(InetSocketAddress addr,
                                         IOException exception) {
    if (exception instanceof ConnectException) {
      //connection refused; include the host:port in the error
      return (ConnectException)new ConnectException(
           "Call to " + addr + " failed on connection exception: " + exception)
                    .initCause(exception);
    } else if (exception instanceof SocketTimeoutException) {
      return (SocketTimeoutException)new SocketTimeoutException(
           "Call to " + addr + " failed on socket timeout exception: "

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   */
  protected IOException wrapException(InetSocketAddress addr,
                                         IOException exception) {
    if (exception instanceof ConnectException) {
      //connection refused; include the host:port in the error
      return (ConnectException)new ConnectException(
         "Call to " + addr + " failed on connection exception: " + exception).initCause(exception);
    } else if (exception instanceof SocketTimeoutException) {
      return (SocketTimeoutException)new SocketTimeoutException("Call to " + addr +
        " failed because " + exception).initCause(exception);
    } else {

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   * @throws ServiceException
   */
  @Test
  public void testGetMetaServerConnectionFails()
  throws IOException, InterruptedException, KeeperException, ServiceException {
    testVerifyMetaRegionLocationWithException(new ConnectException("Connection refused"));
  }

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