Program: 115177
Project: 115177
Buggy source:
@Override public void processRequest() throws Exception {
  String action=request.getParameter("String_Node_Str");
  request.setAttribute("String_Node_Str",getContextPath());
  request.setAttribute("String_Node_Str",getHostPath());
  request.setAttribute("String_Node_Str",getCoreResources().getField("String_Node_Str"));
  if (StringUtil.isBlank(action)) {
    forwardPage(Page.IMPORT_RULES);
  }
  if ("String_Node_Str".equalsIgnoreCase(action)) {
    File xsdFile=getCoreResources().getFile("String_Node_Str");
    dowloadFile(xsdFile,"String_Node_Str");
  }
  if ("String_Node_Str".equalsIgnoreCase(action)) {
    File file=getCoreResources().getFile("String_Node_Str");
    dowloadFile(file,"String_Node_Str");
  }
  if ("String_Node_Str".equalsIgnoreCase(action)) {
    File file=getCoreResources().getFile("String_Node_Str");
    dowloadFile(file,"String_Node_Str");
  }
  if ("String_Node_Str".equalsIgnoreCase(action)) {
    try {
      File f=uploadHelper.returnFiles(request,context,getDirToSaveUploadedFileIn()).get(0);
      InputStream xsdFile=getCoreResources().getInputStream("String_Node_Str");
      schemaValidator.validateAgainstSchema(f,xsdFile);
      RulesPostImportContainer importedRules=handleLoadCastor(f);
      logger.info(ub.getFirstName());
      importedRules=getRulesPostImportContainerService().validateRuleDefs(importedRules);
      importedRules=getRulesPostImportContainerService().validateRuleSetDefs(importedRules);
      session.setAttribute("String_Node_Str",importedRules);
      provideMessage(importedRules);
      forwardPage(Page.VERIFY_RULES_IMPORT_SERVLET);
    }
 catch (    OpenClinicaSystemException re) {
      MessageFormat mf=new MessageFormat("String_Node_Str");
      mf.applyPattern(re.getErrorCode() == null ? respage.getString("String_Node_Str") : respage.getString(re.getErrorCode()));
      Object[] arguments={re.getMessage()};
      if (re.getErrorCode() != null) {
        arguments=re.getErrorParams();
      }
      addPageMessage(mf.format(arguments));
      forwardPage(Page.IMPORT_RULES);
    }
  }
}

Fixed version (ground truth):
@Override public void processRequest() throws Exception {
  String action=request.getParameter("String_Node_Str");
  request.setAttribute("String_Node_Str",getContextPath());
  request.setAttribute("String_Node_Str",getHostPath());
  if (StringUtil.isBlank(action)) {
    forwardPage(Page.IMPORT_RULES);
  }
  if ("String_Node_Str".equalsIgnoreCase(action)) {
    File xsdFile=getCoreResources().getFile("String_Node_Str");
    dowloadFile(xsdFile,"String_Node_Str");
  }
  if ("String_Node_Str".equalsIgnoreCase(action)) {
    File file=getCoreResources().getFile("String_Node_Str");
    dowloadFile(file,"String_Node_Str");
  }
  if ("String_Node_Str".equalsIgnoreCase(action)) {
    File file=getCoreResources().getFile("String_Node_Str");
    dowloadFile(file,"String_Node_Str");
  }
  if ("String_Node_Str".equalsIgnoreCase(action)) {
    try {
      File f=uploadHelper.returnFiles(request,context,getDirToSaveUploadedFileIn()).get(0);
      InputStream xsdFile=getCoreResources().getInputStream("String_Node_Str");
      schemaValidator.validateAgainstSchema(f,xsdFile);
      RulesPostImportContainer importedRules=handleLoadCastor(f);
      logger.info(ub.getFirstName());
      importedRules=getRulesPostImportContainerService().validateRuleDefs(importedRules);
      importedRules=getRulesPostImportContainerService().validateRuleSetDefs(importedRules);
      session.setAttribute("String_Node_Str",importedRules);
      provideMessage(importedRules);
      forwardPage(Page.VERIFY_RULES_IMPORT_SERVLET);
    }
 catch (    OpenClinicaSystemException re) {
      MessageFormat mf=new MessageFormat("String_Node_Str");
      mf.applyPattern(re.getErrorCode() == null ? respage.getString("String_Node_Str") : respage.getString(re.getErrorCode()));
      Object[] arguments={re.getMessage()};
      if (re.getErrorCode() != null) {
        arguments=re.getErrorParams();
      }
      addPageMessage(mf.format(arguments));
      forwardPage(Page.IMPORT_RULES);
    }
  }
}