@Override protected ShardValidateQueryResponse shardOperation(ShardValidateQueryRequest request) { IndexService indexService = indicesService.indexServiceSafe(request.shardId().getIndex()); IndexShard indexShard = indexService.getShard(request.shardId().id()); final QueryShardContext queryShardContext = indexService.newQueryShardContext(); queryShardContext.setTypes(request.types()); boolean valid; String explanation = null; String error = null; Engine.Searcher searcher = indexShard.acquireSearcher("validate_query"); DefaultSearchContext searchContext = new DefaultSearchContext( 0, new ShardSearchLocalRequest( request.types(), request.nowInMillis(), request.filteringAliases()), null, searcher, indexService, indexShard, scriptService, pageCacheRecycler, bigArrays, threadPool.estimatedTimeInMillisCounter(), parseFieldMatcher, SearchService.NO_TIMEOUT); SearchContext.setCurrent(searchContext); try { searchContext.parsedQuery(queryShardContext.toQuery(request.query())); searchContext.preProcess(); valid = true; if (request.rewrite()) { explanation = getRewrittenQuery(searcher.searcher(), searchContext.query()); } else if (request.explain()) { explanation = searchContext.filteredQuery().query().toString(); } } catch (QueryShardException | ParsingException e) { valid = false; error = e.getDetailedMessage(); } catch (AssertionError | IOException e) { valid = false; error = e.getMessage(); } finally { searchContext.close(); SearchContext.removeCurrent(); } return new ShardValidateQueryResponse(request.shardId(), valid, explanation, error); }