SearchServiceTests.testIsParallelCollectionSupportedForResults fails intermittently

```
12:37:10 org.elasticsearch.search.SearchServiceTests > testIsParallelCollectionSupportedForResults FAILED
12:37:10     java.lang.AssertionError
12:37:10         at __randomizedtesting.SeedInfo.seed([4140C168DE8FB0BB:771A78D5E4B36180]:0)
12:37:10         at org.junit.Assert.fail(Assert.java:86)
12:37:10         at org.junit.Assert.assertTrue(Assert.java:41)
12:37:10         at org.junit.Assert.assertFalse(Assert.java:64)
12:37:10         at org.junit.Assert.assertFalse(Assert.java:74)
12:37:10         at org.elasticsearch.search.SearchServiceTests.testIsParallelCollectionSupportedForResults(SearchServiceTests.java:2096)
```

```
./gradlew ':server:test' --tests "org.elasticsearch.search.SearchServiceTests.testIsParallelCollectionSupportedForResults" -Dtests.seed=4140C168DE8FB0BB -Dtests.locale=es-SV -Dtests.timezone=Africa/Banjul -Druntime.java=20
```
server/src/test/java/org/elasticsearch/search/SearchServiceTests.java
}
    public void testDfsQueryPhaseRewrite() {
        createIndex("index");
        client().prepareIndex("index").setId("1").setSource("field", "value").setRefreshPolicy(IMMEDIATE).get();
        final SearchService service = getInstanceFromNode(SearchService.class);
        final IndicesService indicesService = getInstanceFromNode(IndicesService.class);
        final IndexService indexService = indicesService.indexServiceSafe(resolveIndex("index"));
        final IndexShard indexShard = indexService.getShard(0);
        SearchRequest searchRequest = new SearchRequest().allowPartialSearchResults(true);
        searchRequest.source(SearchSourceBuilder.searchSource().query(new TestRewriteCounterQueryBuilder()));
        ShardSearchRequest request = new ShardSearchRequest(
            OriginalIndices.NONE,
            searchRequest,
            indexShard.shardId(),
            0,
            1,
            AliasFilter.EMPTY,
            1.0f,
            -1,
            null
        );
        PlainActionFuture<QuerySearchResult> plainActionFuture = new PlainActionFuture<>();
        final Engine.SearcherSupplier reader = indexShard.acquireSearcherSupplier();
        ReaderContext context = service.createAndPutReaderContext(
            request,
            indexService,
            indexShard,
            reader,
            SearchService.KEEPALIVE_INTERVAL_SETTING.get(Settings.EMPTY).millis()
        );