public Liner clone() {
   try {
     return (Liner) super.clone();
   } catch (CloneNotSupportedException ex) {
     InternalError error = new InternalError(ex.getMessage());
     error.initCause(ex);
     throw error;
   }
 }
  private void tryConnect(boolean requireRemoteSSL) throws IOException {
    if (jmxUrl == null && "localhost".equals(hostName) && port == 0) {
      // Monitor self
      this.jmxc = null;
      this.mbsc = ManagementFactory.getPlatformMBeanServer();
      this.server = Snapshot.newSnapshot(mbsc);
    } else {
      // Monitor another process
      if (lvm != null) {
        if (!lvm.isManageable()) {
          lvm.startManagementAgent();
          if (!lvm.isManageable()) {
            // FIXME: what to throw
            throw new IOException(lvm + "not manageable");
          }
        }
        if (this.jmxUrl == null) {
          this.jmxUrl = new JMXServiceURL(lvm.connectorAddress());
        }
      }
      Map<String, Object> env = new HashMap<String, Object>();
      if (requireRemoteSSL) {
        env.put("jmx.remote.x.check.stub", "true");
      }
      // Need to pass in credentials ?
      if (userName == null && password == null) {
        if (isVmConnector()) {
          // Check for SSL config on reconnection only
          if (stub == null) {
            checkSslConfig();
          }
          this.jmxc = new RMIConnector(stub, null);
          jmxc.connect(env);
        } else {
          this.jmxc = JMXConnectorFactory.connect(jmxUrl, env);
        }
      } else {
        env.put(JMXConnector.CREDENTIALS, new String[] {userName, password});
        if (isVmConnector()) {
          // Check for SSL config on reconnection only
          if (stub == null) {
            checkSslConfig();
          }
          this.jmxc = new RMIConnector(stub, null);
          jmxc.connect(env);
        } else {
          this.jmxc = JMXConnectorFactory.connect(jmxUrl, env);
        }
      }
      this.mbsc = jmxc.getMBeanServerConnection();
      this.server = Snapshot.newSnapshot(mbsc);
    }
    this.isDead = false;

    try {
      ObjectName on = new ObjectName(THREAD_MXBEAN_NAME);
      this.hasPlatformMXBeans = server.isRegistered(on);
      this.hasHotSpotDiagnosticMXBean =
          server.isRegistered(new ObjectName(HOTSPOT_DIAGNOSTIC_MXBEAN_NAME));
      // check if it has 6.0 new APIs
      if (this.hasPlatformMXBeans) {
        MBeanOperationInfo[] mopis = server.getMBeanInfo(on).getOperations();
        // look for findDeadlockedThreads operations;
        for (MBeanOperationInfo op : mopis) {
          if (op.getName().equals("findDeadlockedThreads")) {
            this.supportsLockUsage = true;
            break;
          }
        }

        on = new ObjectName(COMPILATION_MXBEAN_NAME);
        this.hasCompilationMXBean = server.isRegistered(on);
      }
    } catch (MalformedObjectNameException e) {
      // should not reach here
      throw new InternalError(e.getMessage());
    } catch (IntrospectionException e) {
      InternalError ie = new InternalError(e.getMessage());
      ie.initCause(e);
      throw ie;
    } catch (InstanceNotFoundException e) {
      InternalError ie = new InternalError(e.getMessage());
      ie.initCause(e);
      throw ie;
    } catch (ReflectionException e) {
      InternalError ie = new InternalError(e.getMessage());
      ie.initCause(e);
      throw ie;
    }

    if (hasPlatformMXBeans) {
      // WORKAROUND for bug 5056632
      // Check if the access role is correct by getting a RuntimeMXBean
      getRuntimeMXBean();
    }
  }