/**
   * Create a MonitoredHostProvider instance using the given HostIdentifier.
   *
   * @param hostId the host identifier for this MonitoredHost
   * @throws MonitorException Thrown on any error encountered while communicating with the remote
   *     host.
   */
  public MonitoredHostProvider(HostIdentifier hostId) throws MonitorException {
    this.hostId = hostId;
    this.listeners = new ArrayList();
    this.interval = DEFAULT_POLLING_INTERVAL;
    this.activeVms = new HashSet();

    String rmiName;
    String sn = serverName;
    String path = hostId.getPath();

    if ((path != null) && (path.length() > 0)) {
      sn = path;
    }

    if (hostId.getPort() != -1) {
      rmiName = "rmi://" + hostId.getHost() + ":" + hostId.getPort() + sn;
    } else {
      rmiName = "rmi://" + hostId.getHost() + sn;
    }

    try {
      remoteHost = (RemoteHost) Naming.lookup(rmiName);

    } catch (RemoteException e) {
      /*
       * rmi registry not available
       *
       * Access control exceptions, where the rmi server refuses a
       * connection based on policy file configuration, come through
       * here on the client side. Unfortunately, the RemoteException
       * doesn't contain enough information to determine the true cause
       * of the exception. So, we have to output a rather generic message.
       */
      String message = "RMI Registry not available at " + hostId.getHost();

      if (hostId.getPort() == -1) {
        message = message + ":" + java.rmi.registry.Registry.REGISTRY_PORT;
      } else {
        message = message + ":" + hostId.getPort();
      }

      if (e.getMessage() != null) {
        throw new MonitorException(message + "\n" + e.getMessage(), e);
      } else {
        throw new MonitorException(message, e);
      }

    } catch (NotBoundException e) {
      // no server with given name
      String message = e.getMessage();
      if (message == null) message = rmiName;
      throw new MonitorException("RMI Server " + message + " not available", e);
    } catch (MalformedURLException e) {
      // this is a programming problem
      e.printStackTrace();
      throw new IllegalArgumentException("Malformed URL: " + rmiName);
    }
    this.vmManager = new RemoteVmManager(remoteHost);
    this.timer = new Timer(true);
  }
Ejemplo n.º 2
0
 /** Lets the model know if any exceptions occur while communicating with the Interpreter JVM. */
 private void _handleRemoteException(RemoteException e) {
   if (e instanceof UnmarshalException) {
     /* Interpreter JVM has disappeared (perhaps reset); just ignore the error. */
     if (e.getCause() instanceof EOFException) return;
     /* Deals with bug 2688586: Reset during debugging throws UnmarshalException
      * We may want to extend this to all kinds of SocketExceptions. */
     if ((e.getCause() instanceof SocketException)
         && (e.getCause().getMessage().equals("Connection reset"))) return;
   }
   DrJavaErrorHandler.record(e);
 }
Ejemplo n.º 3
0
 /**
  * ***************************************************************
  *
  * @param ip
  * @param port
  * @return
  */
 public ChordMessageInterface rmiChord(String ip, int port) {
   ChordMessageInterface chord = null;
   try {
     Registry registry = LocateRegistry.getRegistry(ip, port);
     chord = (ChordMessageInterface) (registry.lookup("Chord"));
     return chord;
   } catch (RemoteException e) {
     e.printStackTrace();
   } catch (NotBoundException e) {
     e.printStackTrace();
   }
   return null;
 }
Ejemplo n.º 4
0
  /**
   * Construct a client-side proxy that implements the named protocol, talking to a server at the
   * named address.
   *
   * @param protocol protocol
   * @param clientVersion client's version
   * @param addr server address
   * @param ticket security ticket
   * @param conf configuration
   * @param factory socket factory
   * @param rpcTimeout max time for each rpc; 0 means no timeout
   * @return the proxy
   * @throws IOException if any error occurs
   */
  @SuppressWarnings("unchecked")
  public static <T extends VersionedProtocol> ProtocolProxy<T> getProtocolProxy(
      Class<T> protocol,
      long clientVersion,
      InetSocketAddress addr,
      UserGroupInformation ticket,
      Configuration conf,
      SocketFactory factory,
      int rpcTimeout)
      throws IOException {
    T proxy =
        (T)
            Proxy.newProxyInstance(
                protocol.getClassLoader(),
                new Class[] {protocol},
                new Invoker(addr, ticket, conf, factory, rpcTimeout, protocol));
    String protocolName = protocol.getName();

    try {
      ProtocolSignature serverInfo =
          proxy.getProtocolSignature(
              protocolName, clientVersion, ProtocolSignature.getFingerprint(protocol.getMethods()));
      return new ProtocolProxy<T>(protocol, proxy, serverInfo.getMethods());
    } catch (RemoteException re) {
      IOException ioe = re.unwrapRemoteException(IOException.class);
      if (ioe.getMessage()
          .startsWith(IOException.class.getName() + ": " + NoSuchMethodException.class.getName())) {
        // Method getProtocolSignature not supported
        long serverVersion = proxy.getProtocolVersion(protocol.getName(), clientVersion);
        if (serverVersion == clientVersion) {
          return new ProtocolProxy<T>(protocol, proxy, null);
        }
        throw new VersionMismatch(protocolName, clientVersion, serverVersion, proxy);
      }
      throw re;
    }
  }
Ejemplo n.º 5
0
  /**
   * @param argv The parameters passed to this program.
   * @exception Exception if the filesystem does not exist.
   * @return 0 on success, non zero on error.
   */
  private int processArgs(String[] argv) throws Exception {

    if (argv.length < 1) {
      printUsage("");
      return -1;
    }

    int exitCode = -1;
    int i = 0;
    String cmd = argv[i++];

    //
    // verify that we have enough command line parameters
    //
    if ("-geteditsize".equals(cmd)) {
      if (argv.length != 1) {
        printUsage(cmd);
        return exitCode;
      }
    } else if ("-checkpoint".equals(cmd)) {
      if (argv.length != 1 && argv.length != 2) {
        printUsage(cmd);
        return exitCode;
      }
      if (argv.length == 2 && !"force".equals(argv[i])) {
        printUsage(cmd);
        return exitCode;
      }
    }

    exitCode = 0;
    try {
      if ("-checkpoint".equals(cmd)) {
        long size = namenode.getEditLogSize();
        if (size >= checkpointSize || argv.length == 2 && "force".equals(argv[i])) {
          doCheckpoint();
        } else {
          System.err.println(
              "EditLog size "
                  + size
                  + " bytes is "
                  + "smaller than configured checkpoint "
                  + "size "
                  + checkpointSize
                  + " bytes.");
          System.err.println("Skipping checkpoint.");
        }
      } else if ("-geteditsize".equals(cmd)) {
        long size = namenode.getEditLogSize();
        System.out.println("EditLog size is " + size + " bytes");
      } else {
        exitCode = -1;
        LOG.error(cmd.substring(1) + ": Unknown command");
        printUsage("");
      }
    } catch (RemoteException e) {
      //
      // This is a error returned by hadoop server. Print
      // out the first line of the error mesage, ignore the stack trace.
      exitCode = -1;
      try {
        String[] content;
        content = e.getLocalizedMessage().split("\n");
        LOG.error(cmd.substring(1) + ": " + content[0]);
      } catch (Exception ex) {
        LOG.error(cmd.substring(1) + ": " + ex.getLocalizedMessage());
      }
    } catch (IOException e) {
      //
      // IO exception encountered locally.
      //
      exitCode = -1;
      LOG.error(cmd.substring(1) + ": " + e.getLocalizedMessage());
    } finally {
      // Does the RPC connection need to be closed?
    }
    return exitCode;
  }