public void notifyEvicted(LlapMetadataBuffer<?> buffer, boolean isProactiveEviction) {
    metadataCache.notifyEvicted(buffer);
    // Note: the metadata cache may deallocate additional buffers, but not this one.
    requestDeallocation(buffer, isProactiveEviction);
  }
Eviction dispatcher - uses double dispatch to route eviction notifications to correct caches.
llap-server/src/java/org/apache/hadoop/hive/llap/cache/EvictionDispatcher.java