Program: 2559
Project: 2559
Buggy source:
/** 
 * Load all columns for this class specified in the bit set
 * @param stateManager
 * @param fieldSet
 * @return true if the entity was present (I.E the marker column was found)otherwise false is returned.
 */
public boolean loadColumns(OpenJPAStateManager stateManager,BitSet fieldSet,Keyspace keyspace,MetaCache metaCache){
  List<String> fields=new ArrayList<String>();
  StringColumnField<?> field=null;
  AbstractCollectionField<?> collectionField=null;
  Object entityId=stateManager.getObjectId();
  boolean read=false;
  if (MappingUtils.getTargetObject(entityId) == null) {
    return false;
  }
  for (int i=fieldSet.nextSetBit(0); i >= 0; i=fieldSet.nextSetBit(i + 1)) {
    field=columnFieldIds.get(i);
    if (field == null) {
      collectionField=collectionFieldIds.get(i);
      if (collectionField == null) {
        continue;
      }
      int size=stateManager.getContext().getFetchConfiguration().getFetchBatchSize();
      SliceQuery<byte[],DynamicComposite,byte[]> query=collectionField.createQuery(entityId,keyspace,size);
      read|=collectionField.readField(stateManager,query.execute());
      continue;
    }
    fields.add(field.getName());
  }
  SliceQuery<byte[],String,byte[]> query=MappingUtils.buildSliceQuery(entityId,fields,columnFamilyName,keyspace);
  QueryResult<ColumnSlice<String,byte[]>> result=query.execute();
  for (int i=fieldSet.nextSetBit(0); i >= 0; i=fieldSet.nextSetBit(i + 1)) {
    field=columnFieldIds.get(i);
    if (field == null) {
      continue;
    }
    read|=field.readField(stateManager,result);
  }
  if (!read) {
    return exists(stateManager,keyspace,metaCache);
  }
  return true;
}

Fixed version (ground truth):
/** 
 * Load all columns for this class specified in the bit set
 * @param stateManager
 * @param fieldSet
 * @return true if the entity was present (I.E the marker column was found)otherwise false is returned.
 */
public boolean loadColumns(OpenJPAStateManager stateManager,BitSet fieldSet,Keyspace keyspace,MetaCache metaCache){
  List<String> fields=new ArrayList<String>();
  StringColumnField<?> field=null;
  AbstractCollectionField<?> collectionField=null;
  Object entityId=stateManager.getObjectId();
  if (MappingUtils.getTargetObject(entityId) == null) {
    return false;
  }
  for (int i=fieldSet.nextSetBit(0); i >= 0; i=fieldSet.nextSetBit(i + 1)) {
    field=columnFieldIds.get(i);
    if (field == null) {
      collectionField=collectionFieldIds.get(i);
      if (collectionField == null) {
        continue;
      }
      int size=stateManager.getContext().getFetchConfiguration().getFetchBatchSize();
      SliceQuery<byte[],DynamicComposite,byte[]> query=collectionField.createQuery(entityId,keyspace,size);
      collectionField.readField(stateManager,query.execute());
      continue;
    }
    fields.add(field.getName());
  }
  fields.add(this.strategy.getColumnName());
  SliceQuery<byte[],String,byte[]> query=MappingUtils.buildSliceQuery(entityId,fields,columnFamilyName,keyspace);
  QueryResult<ColumnSlice<String,byte[]>> result=query.execute();
  for (int i=fieldSet.nextSetBit(0); i >= 0; i=fieldSet.nextSetBit(i + 1)) {
    field=columnFieldIds.get(i);
    if (field == null) {
      continue;
    }
    field.readField(stateManager,result);
  }
  return result.get().getColumns().size() > 0;
}