boolean corruptedGs = false;
boolean corruptedLen = false;
int reportIndex = 0;
for(Map.Entry<DatanodeStorage, BlockListAsLongs> kvPair : perVolumeBlockLists.entrySet()) {
DatanodeStorage dnStorage = kvPair.getKey();
BlockListAsLongs blockList = kvPair.getValue();
// Walk the list of blocks until we find one each to corrupt the
// generation stamp and length, if so requested.
for (int i = 0; i < blockList.getNumberOfBlocks(); ++i) {