if (btreeName2Id.getBTreeName(treeId) == null) {
tree = BTreeFactory.createBTree(btreeType);
String btreeFileName = retrieveBTreeFileName(treeId);
tree.openForRecovery(btreeFileName, treeId);
if (tree instanceof IBTree) {
IBTree tmpTree = (IBTree) tree;
treeSpec = tmpTree.getBTreeSpec();
}