Program: 95579
Project: 95579
Buggy source:
/** 
 * Sends a request to a Running AUT. The AUT should then connect to the Client using the provided connection information.
 * @param autId The ID of the AUT to which the message should be sent.
 * @param clientHostName The host name to which the AUT should connect.
 * @param clientPort The port number to which the AUT should connect.
 * @return a response that indicates whether the message was successfully sent. This response does <b>not</b> indicate whether the message  was successfully received and processed.
 */
public ConnectToAutResponseMessage sendConnectToClientMessage(AutIdentifier autId,String clientHostName,int clientPort){
synchronized (m_auts) {
    Communicator autSocket=m_auts.get(autId);
    if (autSocket == null) {
      String errorMsg="String_Node_Str";
      LOG.error(errorMsg);
      return new ConnectToAutResponseMessage(errorMsg);
    }
    try {
      Map<String,String> fragmentMap=new HashMap<>();
synchronized (m_autIdToRestartHandler) {
        String startClass=m_autIdToRestartHandler.get(autId).getAUTStartClass();
        Class autServerClass=Class.forName(startClass);
        AbstractStartToolkitAut autStarter=(AbstractStartToolkitAut)autServerClass.newInstance();
        String rcBundleID=autStarter.getRcBundleId();
        if (CommandConstants.RC_JAVAFX_BUNDLE_ID.equals(rcBundleID) || CommandConstants.RC_SWING_BUNDLE_ID.equals(rcBundleID) || CommandConstants.RC_SWT_BUNDLE_ID.equals(rcBundleID)) {
          List<Bundle> fragments=new ArrayList<Bundle>();
          fragments=AbstractStartToolkitAut.getFragmentsForBundleId(rcBundleID);
          for (          Bundle bundle : fragments) {
            StringBuilder pathBuilder=new StringBuilder();
            for (            String entry : AbstractStartToolkitAut.getPathforBundle(bundle)) {
              pathBuilder.append(entry).append(IStartAut.PATH_SEPARATOR);
            }
            if (pathBuilder.length() > 0) {
              fragmentMap.put(pathBuilder.substring(0,pathBuilder.lastIndexOf(IStartAut.PATH_SEPARATOR)),bundle.getHeaders().get(Constants.BUNDLE_NAME));
            }
          }
        }
      }
      autSocket.send(new ConnectToClientMessage(clientHostName,clientPort,fragmentMap));
    }
 catch (    CommunicationException|ClassNotFoundException|InstantiationException|IllegalAccessException ce) {
      LOG.error(ce.getLocalizedMessage(),ce);
      return new ConnectToAutResponseMessage(ce.getLocalizedMessage());
    }
    return new ConnectToAutResponseMessage(null);
  }
}

Fixed version (ground truth):
/** 
 * Sends a request to a Running AUT. The AUT should then connect to the Client using the provided connection information.
 * @param autId The ID of the AUT to which the message should be sent.
 * @param clientHostName The host name to which the AUT should connect.
 * @param clientPort The port number to which the AUT should connect.
 * @return a response that indicates whether the message was successfully sent. This response does <b>not</b> indicate whether the message  was successfully received and processed.
 */
public ConnectToAutResponseMessage sendConnectToClientMessage(AutIdentifier autId,String clientHostName,int clientPort){
synchronized (m_auts) {
    Communicator autSocket=m_auts.get(autId);
    if (autSocket == null) {
      LOG.error(Messages.AutConnectionError);
      return new ConnectToAutResponseMessage(Messages.AutConnectionError);
    }
    try {
      Map<String,String> fragmentMap=new HashMap<>();
synchronized (m_autIdToRestartHandler) {
        String startClass=m_autIdToRestartHandler.get(autId).getAUTStartClass();
        Class autServerClass=Class.forName(startClass);
        AbstractStartToolkitAut autStarter=(AbstractStartToolkitAut)autServerClass.newInstance();
        String rcBundleID=autStarter.getRcBundleId();
        if (CommandConstants.RC_JAVAFX_BUNDLE_ID.equals(rcBundleID) || CommandConstants.RC_SWING_BUNDLE_ID.equals(rcBundleID) || CommandConstants.RC_SWT_BUNDLE_ID.equals(rcBundleID)) {
          List<Bundle> fragments=new ArrayList<Bundle>();
          fragments=AbstractStartToolkitAut.getFragmentsForBundleId(rcBundleID);
          for (          Bundle bundle : fragments) {
            StringBuilder pathBuilder=new StringBuilder();
            for (            String entry : AbstractStartToolkitAut.getPathforBundle(bundle)) {
              pathBuilder.append(entry).append(IStartAut.PATH_SEPARATOR);
            }
            if (pathBuilder.length() > 0) {
              fragmentMap.put(pathBuilder.substring(0,pathBuilder.lastIndexOf(IStartAut.PATH_SEPARATOR)),bundle.getHeaders().get(Constants.BUNDLE_NAME));
            }
          }
        }
      }
      autSocket.send(new ConnectToClientMessage(clientHostName,clientPort,fragmentMap));
    }
 catch (    CommunicationException|ClassNotFoundException|InstantiationException|IllegalAccessException ce) {
      LOG.error(ce.getLocalizedMessage(),ce);
      return new ConnectToAutResponseMessage(ce.getLocalizedMessage());
    }
    return new ConnectToAutResponseMessage(null);
  }
}