new ArrayList<ByteString>(resp.getVolumeIds().size());
for (byte[] b : resp.getVolumeIds()) {
volumeIdsByteStrings.add(ByteString.copyFrom(b));
}
// Build and return the response
Builder builder = GetHdfsBlockLocationsResponseProto.newBuilder();
builder.addAllVolumeIds(volumeIdsByteStrings);
builder.addAllVolumeIndexes(resp.getVolumeIndexes());
return builder.build();
}