Test: more logging for refresh listeners many threads test

This test fails from time to time but doesn't give enough information
for me to figure out what caused the assertion to fail.

Relates to #24418

core/src/test/java/org/elasticsearch/index/shard/RefreshListenersTests.java

@@ -56,6 +56,7 @@ import org.elasticsearch.index.translog.TranslogConfig;
 import org.elasticsearch.test.DummyShardLock;
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.test.IndexSettingsModule;
+import org.elasticsearch.test.junit.annotations.TestLogging;
 import org.elasticsearch.threadpool.TestThreadPool;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.threadpool.ThreadPool.Cancellable;
@@ -272,6 +273,7 @@ public class RefreshListenersTests extends ESTestCase {
      * Uses a bunch of threads to index, wait for refresh, and non-realtime get documents to validate that they are visible after waiting
      * regardless of what crazy sequence of events causes the refresh listener to fire.
      */
+    @TestLogging("_root:debug,org.elasticsearch.index.engine.Engine.DW:trace")
     public void testLotsOfThreads() throws Exception {
         int threadCount = between(3, 10);
         maxListeners = between(1, threadCount * 2);