Fix SearchCancellationIT failures (elastic#101777) (elastic#102009)

We need at least two data nodes in this test, otherwise we are not guaranteed to get two concurrently executing shard query requests because max concurrency could be 1.

closes elastic#101739 elastic#99929

server/src/internalClusterTest/java/org/elasticsearch/search/SearchCancellationIT.java

@@ -32,7 +32,6 @@
 import org.elasticsearch.tasks.TaskCancelledException;
 import org.elasticsearch.test.AbstractSearchCancellationTestCase;
 import org.elasticsearch.test.ESIntegTestCase;
-import org.elasticsearch.test.junit.annotations.TestIssueLogging;
 import org.elasticsearch.transport.TransportService;
 
 import java.util.ArrayList;
@@ -231,11 +230,10 @@ public void testCancelMultiSearch() throws Exception {
         }
     }
 
-    @TestIssueLogging(
-        value = "org.elasticsearch.action.search:TRACE,org.elasticsearch.search:TRACE," + "org.elasticsearch.tasks:TRACE",
-        issueUrl = "https://github.com/elastic/elasticsearch/issues/99929"
-    )
     public void testCancelFailedSearchWhenPartialResultDisallowed() throws Exception {
+        // Have at least two nodes so that we have parallel execution of two request guaranteed even if max concurrent requests per node
+        // are limited to 1
+        internalCluster().ensureAtLeastNumDataNodes(2);
         int numberOfShards = between(2, 5);
         createIndex("test", numberOfShards, 0);
         indexTestData();