Program: 104090
Project: 104090
Buggy source:
/** 
 * Processes a Request received on a SipProvider upon which this SipListener is registered. <p>
 * @param requestEvent requestEvent fired from the SipProvider to the<tt>SipListener</tt> representing a Request received from the network.
 * @return <tt>true</tt> if the specified event has been handled by thisprocessor and shouldn't be offered to other processors registered for the same method; <tt>false</tt>, otherwise
 */
public boolean processRequest(RequestEvent requestEvent){
  ServerTransaction serverTransaction=requestEvent.getServerTransaction();
  SipProvider jainSipProvider=(SipProvider)requestEvent.getSource();
  Request request=requestEvent.getRequest();
  String requestMethod=request.getMethod();
  if (serverTransaction == null) {
    try {
      serverTransaction=jainSipProvider.getNewServerTransaction(request);
    }
 catch (    TransactionAlreadyExistsException ex) {
      logger.error("String_Node_Str" + "String_Node_Str" + "String_Node_Str",ex);
      return false;
    }
catch (    TransactionUnavailableException ex) {
      logger.error("String_Node_Str" + "String_Node_Str" + "String_Node_Str",ex);
      return false;
    }
  }
  boolean processed=false;
  if (requestMethod.equals(Request.INVITE)) {
    logger.debug("String_Node_Str");
    DialogState dialogState=serverTransaction.getDialog().getState();
    if ((dialogState == null) || dialogState.equals(DialogState.CONFIRMED)) {
      if (logger.isDebugEnabled())       logger.debug("String_Node_Str" + dialogState);
      processInvite(jainSipProvider,serverTransaction,request);
      processed=true;
    }
 else {
      logger.error("String_Node_Str" + "String_Node_Str");
    }
  }
 else   if (requestMethod.equals(Request.ACK)) {
    processAck(serverTransaction,request);
    processed=true;
  }
 else   if (requestMethod.equals(Request.BYE)) {
    processBye(serverTransaction,request);
    processed=true;
  }
 else   if (requestMethod.equals(Request.CANCEL)) {
    processCancel(serverTransaction,request);
    processed=true;
  }
 else   if (requestMethod.equals(Request.REFER)) {
    logger.debug("String_Node_Str");
    processRefer(serverTransaction,request,jainSipProvider);
    processed=true;
  }
 else   if (requestMethod.equals(Request.NOTIFY)) {
    logger.debug("String_Node_Str");
    processed=processNotify(serverTransaction,request);
  }
  return processed;
}

Fixed version (ground truth):
/** 
 * Processes a Request received on a SipProvider upon which this SipListener is registered. <p>
 * @param requestEvent requestEvent fired from the SipProvider to the<tt>SipListener</tt> representing a Request received from the network.
 * @return <tt>true</tt> if the specified event has been handled by thisprocessor and shouldn't be offered to other processors registered for the same method; <tt>false</tt>, otherwise
 */
public boolean processRequest(RequestEvent requestEvent){
  ServerTransaction serverTransaction=requestEvent.getServerTransaction();
  SipProvider jainSipProvider=(SipProvider)requestEvent.getSource();
  Request request=requestEvent.getRequest();
  String requestMethod=request.getMethod();
  if (serverTransaction == null) {
    try {
      serverTransaction=SipStackSharing.getOrCreateServerTransaction(requestEvent);
    }
 catch (    TransactionAlreadyExistsException ex) {
      logger.error("String_Node_Str" + "String_Node_Str" + "String_Node_Str",ex);
      return false;
    }
catch (    TransactionUnavailableException ex) {
      logger.error("String_Node_Str" + "String_Node_Str" + "String_Node_Str",ex);
      return false;
    }
  }
  boolean processed=false;
  if (requestMethod.equals(Request.INVITE)) {
    logger.debug("String_Node_Str");
    DialogState dialogState=serverTransaction.getDialog().getState();
    if ((dialogState == null) || dialogState.equals(DialogState.CONFIRMED)) {
      if (logger.isDebugEnabled())       logger.debug("String_Node_Str" + dialogState);
      processInvite(jainSipProvider,serverTransaction,request);
      processed=true;
    }
 else {
      logger.error("String_Node_Str" + "String_Node_Str");
    }
  }
 else   if (requestMethod.equals(Request.ACK)) {
    processAck(serverTransaction,request);
    processed=true;
  }
 else   if (requestMethod.equals(Request.BYE)) {
    processBye(serverTransaction,request);
    processed=true;
  }
 else   if (requestMethod.equals(Request.CANCEL)) {
    processCancel(serverTransaction,request);
    processed=true;
  }
 else   if (requestMethod.equals(Request.REFER)) {
    logger.debug("String_Node_Str");
    processRefer(serverTransaction,request,jainSipProvider);
    processed=true;
  }
 else   if (requestMethod.equals(Request.NOTIFY)) {
    logger.debug("String_Node_Str");
    processed=processNotify(serverTransaction,request);
  }
  return processed;
}