Program: 132238
Project: 132238
Buggy source:
public static void addPathIdtoServiceFunctionForwarder(ServiceFunctionPath serviceFunctionPath){
  LOG.info("String_Node_Str",Thread.currentThread().getStackTrace()[1]);
  InstanceIdentifier<ServiceFunctionForwarders> sffsIID;
  sffsIID=InstanceIdentifier.builder(ServiceFunctionForwarders.class).build();
  ServiceFunctionForwardersBuilder serviceFunctionForwardersBuilder=new ServiceFunctionForwardersBuilder();
  ArrayList<ServiceFunctionForwarder> serviceFunctionForwarderList=new ArrayList<>();
  List<SfpServiceFunction> sfpServiceFunctionArrayList=serviceFunctionPath.getSfpServiceFunction();
  for (  SfpServiceFunction sfpServiceFunction : sfpServiceFunctionArrayList) {
    ServiceFunctionForwarderKey serviceFunctionForwarderKey=new ServiceFunctionForwarderKey(sfpServiceFunction.getServiceFunctionForwarder());
    ServiceFunctionForwarder serviceFunctionForwarder=readServiceFunctionForwarder(sfpServiceFunction.getServiceFunctionForwarder());
    ServiceFunctionForwarderBuilder serviceFunctionForwarderBuilder=new ServiceFunctionForwarderBuilder();
    if (serviceFunctionForwarder != null) {
      serviceFunctionForwarderBuilder.setPathId(serviceFunctionPath.getPathId());
      serviceFunctionForwarderBuilder.setName(sfpServiceFunction.getServiceFunctionForwarder());
      serviceFunctionForwarderBuilder.setSffDataPlaneLocator(serviceFunctionForwarder.getSffDataPlaneLocator());
      serviceFunctionForwarderBuilder.setServiceFunctionDictionary(serviceFunctionForwarder.getServiceFunctionDictionary());
      serviceFunctionForwarderBuilder.setKey(serviceFunctionForwarderKey);
    }
    serviceFunctionForwarderList.add(serviceFunctionForwarderBuilder.build());
  }
  serviceFunctionForwardersBuilder.setServiceFunctionForwarder(serviceFunctionForwarderList);
  final DataModificationTransaction t=odlSfc.dataProvider.beginTransaction();
  t.putConfigurationData(sffsIID,serviceFunctionForwardersBuilder.build());
  try {
    t.commit().get();
  }
 catch (  ExecutionException|InterruptedException e) {
    LOG.warn("String_Node_Str",e);
  }
  LOG.info("String_Node_Str",Thread.currentThread().getStackTrace()[1]);
}

Fixed version (ground truth):
public static void addPathIdtoServiceFunctionForwarder(ServiceFunctionPath serviceFunctionPath){
  LOG.debug("String_Node_Str",Thread.currentThread().getStackTrace()[1]);
  InstanceIdentifier<ServiceFunctionForwarders> sffsIID;
  sffsIID=InstanceIdentifier.builder(ServiceFunctionForwarders.class).build();
  ServiceFunctionForwardersBuilder serviceFunctionForwardersBuilder=new ServiceFunctionForwardersBuilder();
  ArrayList<ServiceFunctionForwarder> serviceFunctionForwarderList=new ArrayList<>();
  List<SfpServiceFunction> sfpServiceFunctionArrayList=serviceFunctionPath.getSfpServiceFunction();
  for (  SfpServiceFunction sfpServiceFunction : sfpServiceFunctionArrayList) {
    ServiceFunctionForwarderKey serviceFunctionForwarderKey=new ServiceFunctionForwarderKey(sfpServiceFunction.getServiceFunctionForwarder());
    ServiceFunctionForwarder serviceFunctionForwarder=readServiceFunctionForwarder(sfpServiceFunction.getServiceFunctionForwarder());
    ServiceFunctionForwarderBuilder serviceFunctionForwarderBuilder=new ServiceFunctionForwarderBuilder();
    if (serviceFunctionForwarder != null) {
      serviceFunctionForwarderBuilder.setPathId(serviceFunctionPath.getPathId());
      serviceFunctionForwarderBuilder.setName(sfpServiceFunction.getServiceFunctionForwarder());
      serviceFunctionForwarderBuilder.setSffDataPlaneLocator(serviceFunctionForwarder.getSffDataPlaneLocator());
      serviceFunctionForwarderBuilder.setServiceFunctionDictionary(serviceFunctionForwarder.getServiceFunctionDictionary());
      serviceFunctionForwarderBuilder.setKey(serviceFunctionForwarderKey);
    }
    serviceFunctionForwarderList.add(serviceFunctionForwarderBuilder.build());
  }
  serviceFunctionForwardersBuilder.setServiceFunctionForwarder(serviceFunctionForwarderList);
  final DataModificationTransaction t=odlSfc.dataProvider.beginTransaction();
  t.putConfigurationData(sffsIID,serviceFunctionForwardersBuilder.build());
  try {
    t.commit().get();
  }
 catch (  ExecutionException|InterruptedException e) {
    LOG.warn("String_Node_Str",e);
  }
  LOG.debug("String_Node_Str",Thread.currentThread().getStackTrace()[1]);
}