public void checkHeader(int headerIx, int freeListIx, boolean isLocked) {
      checkHeaderByte(arenaIx, headerIx, freeListIx, isLocked, headers[headerIx]);
    }
Quite similar as deallocateEvicted, however since this request was not originated from a reserveMemory call,
MM state has to be maintained here.
@param buffer
llap-server/src/java/org/apache/hadoop/hive/llap/cache/BuddyAllocator.java