Unmute test and fix for SearchWithRandomDisconnectsIT::testSearchWithRandomDisconnects (elastic#125838)

Provide a fix for a test execution and unmute the test.

Author: drempapis

muted-tests.yml

@@ -221,9 +221,6 @@ tests:
 - class: org.elasticsearch.blocks.SimpleBlocksIT
   method: testConcurrentAddBlock
   issue: https://github.com/elastic/elasticsearch/issues/122324
-- class: org.elasticsearch.search.basic.SearchWithRandomDisconnectsIT
-  method: testSearchWithRandomDisconnects
-  issue: https://github.com/elastic/elasticsearch/issues/122707
 - class: org.elasticsearch.xpack.esql.heap_attack.HeapAttackIT
   method: testEnrichExplosionManyMatches
   issue: https://github.com/elastic/elasticsearch/issues/122913

server/src/internalClusterTest/java/org/elasticsearch/search/basic/SearchWithRandomDisconnectsIT.java

@@ -8,6 +8,7 @@
  */
 package org.elasticsearch.search.basic;
 
+import org.apache.lucene.tests.util.LuceneTestCase;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.bulk.BulkRequestBuilder;
 import org.elasticsearch.action.search.SearchRequestBuilder;
@@ -29,6 +30,7 @@
 
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
 
+@LuceneTestCase.SuppressFileSystems(value = "HandleLimitFS") // we sometimes have >2048 open files
 public class SearchWithRandomDisconnectsIT extends AbstractDisruptionTestCase {
 
     public void testSearchWithRandomDisconnects() throws InterruptedException, ExecutionException {