private int getArenaCount() {
    int arenaCount = allocatedArenas.get();
    if (arenaCount < 0) {
      arenaCount = -arenaCount - 1; // Next arena is being allocated.
    }
    return arenaCount;
  }
Default max amount of bytes to force evict on failed allocation attempts 16MB. used for testing, for production
please adjust {@link ConfVars.LLAP_ALLOCATOR_MAX_FORCE_EVICTED}
llap-server/src/java/org/apache/hadoop/hive/llap/cache/BuddyAllocator.java