Adjust testWaitForPendingSeqNo (#39404)

Since #39006, we should either remove `testWaitForPendingSeqNo` 
or adjust it not to wait for the pending operations. This change picks 
the latter.

Relates #39006

Author: dnhatn

server/src/test/java/org/elasticsearch/index/replication/RecoveryDuringReplicationTests.java

@@ -75,15 +75,13 @@
 import java.util.stream.Collectors;
 
 import static org.hamcrest.Matchers.anyOf;
-import static org.hamcrest.Matchers.both;
 import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.everyItem;
 import static org.hamcrest.Matchers.greaterThanOrEqualTo;
 import static org.hamcrest.Matchers.is;
 import static org.hamcrest.Matchers.isIn;
 import static org.hamcrest.Matchers.lessThan;
-import static org.hamcrest.Matchers.lessThanOrEqualTo;
 import static org.hamcrest.Matchers.not;
 
 public class RecoveryDuringReplicationTests extends ESIndexLevelReplicationTestCase {
@@ -441,17 +439,7 @@ public void testResyncAfterPrimaryPromotion() throws Exception {
         }
     }
 
-    @TestLogging(
-            "_root:DEBUG,"
-                    + "org.elasticsearch.action.bulk:TRACE,"
-                    + "org.elasticsearch.action.get:TRACE,"
-                    + "org.elasticsearch.cluster.service:TRACE,"
-                    + "org.elasticsearch.discovery:TRACE,"
-                    + "org.elasticsearch.indices.cluster:TRACE,"
-                    + "org.elasticsearch.indices.recovery:TRACE,"
-                    + "org.elasticsearch.index.seqno:TRACE,"
-                    + "org.elasticsearch.index.shard:TRACE")
-    public void testWaitForPendingSeqNo() throws Exception {
+    public void testDoNotWaitForPendingSeqNo() throws Exception {
         IndexMetaData metaData = buildIndexMetaData(1);
 
         final int pendingDocs = randomIntBetween(1, 5);
@@ -525,7 +513,7 @@ public void indexTranslogOperations(
             final int indexedDuringRecovery = shards.indexDocs(randomInt(5));
             docs += indexedDuringRecovery;
 
-            assertFalse("recovery should wait on pending docs", opsSent.get());
+            assertBusy(() -> assertFalse("recovery should not wait for on pending docs", opsSent.get()));
 
             primaryEngineFactory.releaseLatchedIndexers();
             pendingDocsDone.await();
@@ -534,10 +522,6 @@ public void indexTranslogOperations(
             recoveryFuture.get();
 
             assertThat(newReplica.recoveryState().getIndex().fileDetails(), empty());
-            assertThat(newReplica.recoveryState().getTranslog().recoveredOperations(),
-                // we don't know which of the inflight operations made it into the translog range we re-play
-                both(greaterThanOrEqualTo(docs-indexedDuringRecovery)).and(lessThanOrEqualTo(docs)));
-
             shards.assertAllEqual(docs);
         } finally {
             primaryEngineFactory.close();