@Override
protected ShardSuggestResponse shardOperation(ShardSuggestRequest request) throws ElasticsearchException {
IndexService indexService = indicesService.indexServiceSafe(request.shardId().getIndex());
IndexShard indexShard = indexService.shardSafe(request.shardId().id());
final Engine.Searcher searcher = indexShard.acquireSearcher("suggest");
ShardSuggestService shardSuggestService = indexShard.shardSuggestService();
shardSuggestService.preSuggest();
long startTime = System.nanoTime();
XContentParser parser = null;
try {
BytesReference suggest = request.suggest();