Revert "Avoid unneeded refresh with concurrent realtime gets (#47895)"

This reverts commit 75f6eb7.

Author: dnhatn

server/src/main/java/org/elasticsearch/index/engine/InternalEngine.java

@@ -675,8 +675,7 @@ public GetResult get(Get get, BiFunction<String, SearcherScope, Searcher> search
                             trackTranslogLocation.set(true);
                         }
                     }
-                    assert versionValue.seqNo >= 0 : versionValue;
-                    refreshIfNeeded("realtime_get", versionValue.seqNo);
+                    refresh("realtime_get", SearcherScope.INTERNAL);
                 }
                 scope = SearcherScope.INTERNAL;
             } else {

server/src/test/java/org/elasticsearch/index/engine/InternalEngineTests.java

@@ -158,7 +158,6 @@
 import java.util.concurrent.BrokenBarrierException;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.CyclicBarrier;
-import java.util.concurrent.Phaser;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -5897,58 +5896,4 @@ private void runTestDeleteFailure(
         }
     }
 
-    public void testRealtimeGetOnlyRefreshIfNeeded() throws Exception {
-        final AtomicInteger refreshCount = new AtomicInteger();
-        final ReferenceManager.RefreshListener refreshListener = new ReferenceManager.RefreshListener() {
-            @Override
-            public void beforeRefresh() {
-
-            }
-
-            @Override
-            public void afterRefresh(boolean didRefresh) {
-                if (didRefresh) {
-                    refreshCount.incrementAndGet();
-                }
-            }
-        };
-        try (Store store = createStore()) {
-            final EngineConfig config = config(defaultSettings, store, createTempDir(), newMergePolicy(), null,
-                refreshListener, null, null, engine.config().getCircuitBreakerService());
-            try (InternalEngine engine = createEngine(config)) {
-                int numDocs = randomIntBetween(10, 100);
-                Set<String> ids = new HashSet<>();
-                for (int i = 0; i < numDocs; i++) {
-                    String id = Integer.toString(i);
-                    engine.index(indexForDoc(createParsedDoc(id, null)));
-                    ids.add(id);
-                }
-                final int refreshCountBeforeGet = refreshCount.get();
-                Thread[] getters = new Thread[randomIntBetween(1, 4)];
-                Phaser phaser = new Phaser(getters.length + 1);
-                for (int t = 0; t < getters.length; t++) {
-                    getters[t] = new Thread(() -> {
-                        phaser.arriveAndAwaitAdvance();
-                        int iters = randomIntBetween(1, 10);
-                        for (int i = 0; i < iters; i++) {
-                            ParsedDocument doc = createParsedDoc(randomFrom(ids), null);
-                            try (Engine.GetResult getResult = engine.get(newGet(true, doc), engine::acquireSearcher)) {
-                                assertThat(getResult.exists(), equalTo(true));
-                                assertThat(getResult.docIdAndVersion(), notNullValue());
-                            }
-                        }
-                    });
-                    getters[t].start();
-                }
-                phaser.arriveAndAwaitAdvance();
-                for (int i = 0; i < numDocs; i++) {
-                    engine.index(indexForDoc(createParsedDoc("more-" + i, null)));
-                }
-                for (Thread getter : getters) {
-                    getter.join();
-                }
-                assertThat(refreshCount.get(), lessThanOrEqualTo(refreshCountBeforeGet + 1));
-            }
-        }
-    }
 }