Examples of java.net.UnknownHostException

java.net.UnknownHostException
Thrown to indicate that the IP address of a host could not be determined. @author Jonathan Payne @version 1.16, 11/17/05 @since JDK1.0

      throw bindException;
    } catch (SocketException e) {
      // If they try to bind to a different host's address, give a better
      // error message.
      if ("Unresolved address".equals(e.getMessage())) {
        throw new UnknownHostException("Invalid hostname for server: " +
                                       address.getHostName());
      }
      throw e;
    }
  }

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    protected IOException closeException; // close reason


    Connection(ConnectionId remoteId, final Codec codec, final CompressionCodec compressor)
    throws IOException {
      if (remoteId.getAddress().isUnresolved()) {
        throw new UnknownHostException("unknown host: " + remoteId.getAddress().getHostName());
      }
      this.server = remoteId.getAddress();
      this.codec = codec;
      this.compressor = compressor;

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    private long lastActivity = 0;
    private boolean shouldCloseConnection = false;


    public Connection(InetSocketAddress address) throws IOException {
      if (address.isUnresolved()) {
        throw new UnknownHostException("unknown host: " + address.getHostName());
      }
      this.address = address;
      this.setName("IPC Client connection to " + address.toString());
      this.setDaemon(true);
    }

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      throw bindException;
    } catch (SocketException e) {
      // If they try to bind to a different host's address, give a better
      // error message.
      if ("Unresolved address".equals(e.getMessage())) {
        throw new UnknownHostException("Invalid hostname for server: " + 
                                       address.getHostName());
      } else {
        throw e;
      }
    }

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      this(new ConnectionId(address, null));
    }
    
    public Connection(ConnectionId remoteId) throws IOException {
      if (remoteId.getAddress().isUnresolved()) {
        throw new UnknownHostException("unknown host: " + 
                                       remoteId.getAddress().getHostName());
      }
      this.remoteId = remoteId;
      UserGroupInformation ticket = remoteId.getTicket();
      this.setName("IPC Client (" + socketFactory.hashCode() +") connection to " +

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            return;
        }
        if (address instanceof InetSocketAddress) {
            InetSocketAddress endpoint = (InetSocketAddress) address;
            if (endpoint.isUnresolved()) {
                throw new UnknownHostException(endpoint.getHostName());
            }
        }
    }

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    if (line.startsWith("connected to")) {
/*System.out.println("connected itelnet " + host + ":" + port + " " + System.currentTimeMillis());*/
        return sock;
    }
    if (line.endsWith("unknown host")) {
        throw new UnknownHostException(host);
    }
      }
  } catch (IOException e) {
      if (sock != null) {
    sock.close();

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    } catch (ParserConfigurationException pce) {
      throw new CatalogException(CatalogException.UNKNOWN_FORMAT);
    } catch (SAXException se) {
      Exception e = se.getException();
      // FIXME: there must be a better way
      UnknownHostException uhe = new UnknownHostException();
      FileNotFoundException fnfe = new FileNotFoundException();
      if (e != null) {
  if (e.getClass() == uhe.getClass()) {
    throw new CatalogException(CatalogException.PARSE_FAILED,
             e.toString());
  } else if (e.getClass() == fnfe.getClass()) {
    throw new CatalogException(CatalogException.PARSE_FAILED,
             e.toString());

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      throw bindException;
    } catch (SocketException e) {
      // If they try to bind to a different host's address, give a better
      // error message.
      if ("Unresolved address".equals(e.getMessage())) {
        throw new UnknownHostException("Invalid hostname for server: " +
                                       address.getHostName());
      }
      throw e;
    }
  }

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    protected IOException closeException; // close reason


    Connection(ConnectionId remoteId, final Codec codec, final CompressionCodec compressor)
    throws IOException {
      if (remoteId.getAddress().isUnresolved()) {
        throw new UnknownHostException("unknown host: " + remoteId.getAddress().getHostName());
      }
      this.server = remoteId.getAddress();
      this.codec = codec;
      this.compressor = compressor;

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