* BIN (and DIN) since we always attempt to acquire a non-blocking
* read lock. Holding the latch ensures that the INs won't change
* underneath us because of splits or eviction.
*/
locker = new BasicLocker(env);
LockGrantType lock = locker.nonBlockingReadLock(nodeId, db);
if (lock == LockGrantType.DENIED) {
/*
* LN is currently locked by another Locker, so we can't assume
* anything about the value of the LSN in the bin. However,