Program: 45933
Project: 45933
Buggy source:
private void startSoftphone(GetVoiceBridgeResponseMessage msg){
  logger.warning("String_Node_Str" + msg.getBridgeInfo());
  String phoneNumber=System.getProperty("String_Node_Str");
  System.setProperty("String_Node_Str","String_Node_Str");
  if (phoneNumber != null && phoneNumber.length() > 0) {
    session.send(this,new PlaceCallRequestMessage(presenceInfo,phoneNumber,0.,0.,0.,90.,false));
    return;
  }
  SoftphoneControlImpl sc=SoftphoneControlImpl.getInstance();
  String tokens[]=msg.getBridgeInfo().split("String_Node_Str");
  String registrarAddress=tokens[5] + "String_Node_Str";
  registrarAddress+=tokens[7];
  String localAddress=null;
  try {
    InetAddress ia=NetworkAddress.getPrivateLocalAddress("String_Node_Str" + tokens[5] + "String_Node_Str"+ tokens[7]+ "String_Node_Str");
    localAddress=ia.getHostAddress();
  }
 catch (  UnknownHostException e) {
    logger.warning(e.getMessage());
    logger.warning("String_Node_Str" + "String_Node_Str");
    try {
      InetAddress ia=NetworkAddress.getPrivateLocalAddress("String_Node_Str" + tokens[2] + "String_Node_Str"+ tokens[4]+ "String_Node_Str");
      localAddress=ia.getHostAddress();
    }
 catch (    UnknownHostException ee) {
      logger.warning(ee.getMessage());
    }
  }
  if (localAddress != null) {
    try {
      String sipURL=sc.startSoftphone(presenceInfo.userID.getUsername(),registrarAddress,10,localAddress);
      logger.fine("String_Node_Str" + presenceInfo);
      if (sipURL != null) {
        session.send(this,new PlaceCallRequestMessage(presenceInfo,sipURL,0.,0.,0.,90.,false));
      }
 else {
        System.out.println("String_Node_Str");
        try {
          Thread.sleep(2000);
        }
 catch (        InterruptedException e) {
        }
        connectSoftphone();
      }
    }
 catch (    IOException e) {
      logger.warning(e.getMessage());
    }
  }
 else {
    logger.warning("String_Node_Str");
    connectSoftphone();
  }
}

Fixed version (ground truth):
private void startSoftphone(GetVoiceBridgeResponseMessage msg){
  logger.warning("String_Node_Str" + msg.getBridgeInfo());
  String phoneNumber=System.getProperty("String_Node_Str");
  System.setProperty("String_Node_Str","String_Node_Str");
  if (phoneNumber != null && phoneNumber.length() > 0) {
    session.send(this,new PlaceCallRequestMessage(presenceInfo,phoneNumber,0.,0.,0.,90.,false));
    return;
  }
  SoftphoneControlImpl sc=SoftphoneControlImpl.getInstance();
  String tokens[]=msg.getBridgeInfo().split("String_Node_Str");
  String registrarAddress=tokens[5] + "String_Node_Str";
  registrarAddress+=tokens[7];
  String localAddress=null;
  try {
    InetAddress ia=NetworkAddress.getPrivateLocalAddress("String_Node_Str" + tokens[5] + "String_Node_Str"+ tokens[7]+ "String_Node_Str");
    localAddress=ia.getHostAddress();
  }
 catch (  UnknownHostException e) {
    logger.warning(e.getMessage());
    logger.warning("String_Node_Str" + "String_Node_Str");
    try {
      InetAddress ia=NetworkAddress.getPrivateLocalAddress("String_Node_Str" + tokens[2] + "String_Node_Str"+ tokens[4]+ "String_Node_Str");
      localAddress=ia.getHostAddress();
    }
 catch (    UnknownHostException ee) {
      logger.warning(ee.getMessage());
    }
  }
  if (localAddress != null) {
    try {
      String sipURL=sc.startSoftphone(presenceInfo.userID.getUsername(),registrarAddress,10,localAddress);
      logger.fine("String_Node_Str" + presenceInfo);
      if (sipURL != null) {
        session.send(this,new PlaceCallRequestMessage(presenceInfo,sipURL,0.,0.,0.,90.,false));
      }
 else {
        logger.warning("String_Node_Str");
        try {
          Thread.sleep(2000);
        }
 catch (        InterruptedException e) {
        }
        connectSoftphone();
      }
    }
 catch (    IOException e) {
      logger.warning(e.getMessage());
    }
  }
 else {
    logger.warning("String_Node_Str");
    connectSoftphone();
  }
}