hollow/src/main/java/com/netflix/hollow/core/index/HollowHashIndex.java
private void reindexHashIndex() {
        HollowHashIndexBuilder builder = new HollowHashIndexBuilder(stateEngine, type, selectField, matchFields);

        builder.buildIndex();

        this.hashStateVolatile = new HollowHashIndexState(builder);
    }
private void reindexHashIndex() {
        HollowHashIndexBuilder builder = new HollowHashIndexBuilder(stateEngine, type, selectField, matchFields);

        builder.buildIndex();

        this.hashStateVolatile = new HollowHashIndexState(builder);
    }
Recreate the hash index entirely