Program: 88512
Project: 88512
Buggy source:
public String createEntity(EntityReference ref,Object entity,Map<String,Object> params){
  System.out.println("String_Node_Str");
  String result="String_Node_Str";
  Map<String,Object> inputVar=(HashMap)entity;
  String action="String_Node_Str";
  String function="String_Node_Str";
  String[] mandatory_params={};
  try {
    inputVar.get("String_Node_Str").getClass().getName();
  }
 catch (  NullPointerException ex) {
    throw new EntityException("String_Node_Str","String_Node_Str",400);
  }
  try {
    action=(String)inputVar.get("String_Node_Str");
  }
 catch (  ClassCastException ex2) {
    throw new EntityException("String_Node_Str","String_Node_Str",400);
  }
  if (func2actionMapPOST_rev.get(action) != null) {
    System.out.println("String_Node_Str" + func2actionMapPOST_rev.get("String_Node_Str"));
    function=func2actionMapPOST_rev.get(action);
    mandatory_params=inputParamsPOST.get(function);
  }
  for (  String param : mandatory_params) {
    if (inputVar.get(param) == null) {
      throw new EntityException("String_Node_Str","String_Node_Str",400);
    }
  }
  Context context;
  try {
    context=new Context();
  }
 catch (  SQLException ex) {
    throw new EntityException("String_Node_Str","String_Node_Str",500);
  }
  UserRequestParams uparams;
  uparams=refreshParams(context);
  Object CE=new Object();
  System.out.println("String_Node_Str" + ref.getId());
  try {
    if (ref.getId() != null) {
      CE=entityConstructor.newInstance(ref.getId(),context,1,uparams);
    }
 else {
      CE=entityConstructor2.newInstance(context,1,uparams);
    }
  }
 catch (  Exception ex) {
    ex.printStackTrace();
    throw new EntityException("String_Node_Str","String_Node_Str",500);
  }
  try {
    Method method=CE.getClass().getMethod(function,funcParamsPOST.get(action));
    result=(String)method.invoke(CE,ref,inputVar,context);
  }
 catch (  InvocationTargetException ex) {
    if (ex.getCause() != null) {
      throw (RuntimeException)ex.getCause();
    }
 else {
      throw new EntityException("String_Node_Str","String_Node_Str",500);
    }
  }
catch (  NoSuchMethodException ex) {
    throw new EntityException("String_Node_Str","String_Node_Str",404);
  }
catch (  IllegalAccessException ex) {
    throw new EntityException("String_Node_Str","String_Node_Str" + function,500);
  }
  try {
    removeConn(context);
  }
 catch (  NullPointerException ex) {
  }
  return result;
}

Fixed version (ground truth):
public String createEntity(EntityReference ref,Object entity,Map<String,Object> params){
  System.out.println("String_Node_Str");
  String result="String_Node_Str";
  Map<String,Object> inputVar=(HashMap)entity;
  String action="String_Node_Str";
  String function="String_Node_Str";
  String[] mandatory_params={};
  try {
    inputVar.get("String_Node_Str").getClass().getName();
  }
 catch (  NullPointerException ex) {
    throw new EntityException("String_Node_Str","String_Node_Str",400);
  }
  try {
    action=(String)inputVar.get("String_Node_Str");
  }
 catch (  ClassCastException ex2) {
    throw new EntityException("String_Node_Str","String_Node_Str",400);
  }
  if (func2actionMapPOST_rev.get(action) != null) {
    System.out.println("String_Node_Str" + func2actionMapPOST_rev.get("String_Node_Str"));
    function=func2actionMapPOST_rev.get(action);
    mandatory_params=inputParamsPOST.get(function);
  }
  for (  String param : mandatory_params) {
    if (inputVar.get(param) == null) {
      throw new EntityException("String_Node_Str","String_Node_Str",400);
    }
  }
  Context context;
  try {
    context=new Context();
  }
 catch (  SQLException ex) {
    throw new EntityException("String_Node_Str","String_Node_Str",500);
  }
  UserRequestParams uparams;
  uparams=refreshParams(context);
  Object CE=new Object();
  System.out.println("String_Node_Str" + ref.getId());
  try {
    CE=entityConstructor.newInstance(ref.getId(),context,1,uparams);
  }
 catch (  Exception ex) {
    ex.printStackTrace();
    throw new EntityException("String_Node_Str","String_Node_Str",500);
  }
  try {
    Method method=CE.getClass().getMethod(function,funcParamsPOST.get(action));
    result=(String)method.invoke(CE,ref,inputVar,context);
  }
 catch (  InvocationTargetException ex) {
    if (ex.getCause() != null) {
      throw (RuntimeException)ex.getCause();
    }
 else {
      throw new EntityException("String_Node_Str","String_Node_Str",500);
    }
  }
catch (  NoSuchMethodException ex) {
    throw new EntityException("String_Node_Str","String_Node_Str",404);
  }
catch (  IllegalAccessException ex) {
    throw new EntityException("String_Node_Str","String_Node_Str" + function,500);
  }
  try {
    removeConn(context);
  }
 catch (  NullPointerException ex) {
  }
  return result;
}