Program: 97934
Project: 97934
Buggy source:
@SuppressWarnings("String_Node_Str") private void loadCache(){
  if (cachedRows != null && cachedRows.hasNext())   return;
 else   if (lastRowCount >= batchSize)   return;
 else   if (!theKeys.hasNext())   return;
  String colFamily=info.getColumnFamilyObj().getName();
  List<RowHolder<Row>> results=new ArrayList<RowHolder<Row>>();
  List<byte[]> keysToLookup=new ArrayList<byte[]>();
  while (results.size() < batchSize && theKeys.hasNext()) {
    byte[] key=theKeys.next();
    RowHolder<Row> result=cache.fromCache(colFamily,key);
    if (result == null)     keysToLookup.add(key);
    results.add(result);
  }
  list.beforeFetchingNextBatch();
  ColumnFamily<byte[],byte[]> cf=info.getColumnFamilyObj();
  ColumnFamilyQuery<byte[],byte[]> q2=keyspace.prepareQuery(cf);
  RowSliceQuery<byte[],byte[]> slice=q2.getKeySlice(keysToLookup);
  OperationResult<Rows<byte[],byte[]>> result=execute(slice);
  Rows<byte[],byte[]> rows=result.getResult();
  Iterator<com.netflix.astyanax.model.Row<byte[],byte[]>> resultingRows=rows.iterator();
  lastRowCount=rows.size();
  list.afterFetchingNextBatch(rows.size());
  Map<ByteArray,KeyValue<Row>> map=new HashMap<ByteArray,KeyValue<Row>>();
  while (resultingRows.hasNext()) {
    com.netflix.astyanax.model.Row<byte[],byte[]> row=resultingRows.next();
    KeyValue<Row> kv=new KeyValue<Row>();
    kv.setKey(row.getKey());
    if (!row.getColumns().isEmpty()) {
      Row r=rowProvider.get();
      r.setKey(row.getKey());
      CassandraSession.processColumns(row,r);
      kv.setValue(r);
    }
    ByteArray b=new ByteArray(row.getKey());
    map.put(b,kv);
  }
  List<KeyValue<Row>> finalRes=new ArrayList<KeyValue<Row>>();
  Iterator<byte[]> keyIter=keysToLookup.iterator();
  for (  RowHolder<Row> r : results) {
    if (r == null) {
      byte[] key=keyIter.next();
      ByteArray b=new ByteArray(key);
      KeyValue<Row> kv=map.get(b);
      finalRes.add(kv);
    }
 else {
      Row row=r.getValue();
      KeyValue<Row> kv=new KeyValue<Row>();
      kv.setKey(r.getKey());
      kv.setValue(row);
      finalRes.add(kv);
    }
  }
  cachedRows=finalRes.iterator();
}

Fixed version (ground truth):
@SuppressWarnings("String_Node_Str") private void loadCache(){
  if (cachedRows != null && cachedRows.hasNext())   return;
 else   if (!theKeys.hasNext())   return;
  String colFamily=info.getColumnFamilyObj().getName();
  List<RowHolder<Row>> results=new ArrayList<RowHolder<Row>>();
  List<byte[]> keysToLookup=new ArrayList<byte[]>();
  while (results.size() < batchSize && theKeys.hasNext()) {
    byte[] key=theKeys.next();
    RowHolder<Row> result=cache.fromCache(colFamily,key);
    if (result == null)     keysToLookup.add(key);
    results.add(result);
  }
  list.beforeFetchingNextBatch();
  ColumnFamily<byte[],byte[]> cf=info.getColumnFamilyObj();
  ColumnFamilyQuery<byte[],byte[]> q2=keyspace.prepareQuery(cf);
  RowSliceQuery<byte[],byte[]> slice=q2.getKeySlice(keysToLookup);
  OperationResult<Rows<byte[],byte[]>> result=execute(slice);
  Rows<byte[],byte[]> rows=result.getResult();
  Iterator<com.netflix.astyanax.model.Row<byte[],byte[]>> resultingRows=rows.iterator();
  lastRowCount=rows.size();
  list.afterFetchingNextBatch(rows.size());
  Map<ByteArray,KeyValue<Row>> map=new HashMap<ByteArray,KeyValue<Row>>();
  while (resultingRows.hasNext()) {
    com.netflix.astyanax.model.Row<byte[],byte[]> row=resultingRows.next();
    KeyValue<Row> kv=new KeyValue<Row>();
    kv.setKey(row.getKey());
    if (!row.getColumns().isEmpty()) {
      Row r=rowProvider.get();
      r.setKey(row.getKey());
      CassandraSession.processColumns(row,r);
      kv.setValue(r);
    }
    ByteArray b=new ByteArray(row.getKey());
    map.put(b,kv);
  }
  List<KeyValue<Row>> finalRes=new ArrayList<KeyValue<Row>>();
  Iterator<byte[]> keyIter=keysToLookup.iterator();
  for (  RowHolder<Row> r : results) {
    if (r == null) {
      byte[] key=keyIter.next();
      ByteArray b=new ByteArray(key);
      KeyValue<Row> kv=map.get(b);
      finalRes.add(kv);
    }
 else {
      Row row=r.getValue();
      KeyValue<Row> kv=new KeyValue<Row>();
      kv.setKey(r.getKey());
      kv.setValue(row);
      finalRes.add(kv);
    }
  }
  cachedRows=finalRes.iterator();
}