Fix CursorResourceManager.close (#1440) (#1447)

JAVA-5516

Author: stIncMale

driver-core/src/main/com/mongodb/internal/operation/CursorResourceManager.java

@@ -182,7 +182,7 @@ void endOperation() {
     void close() {
         boolean doClose = withLock(lock, () -> {
             State localState = state;
-            if (localState == State.OPERATION_IN_PROGRESS) {
+            if (localState.inProgress()) {
                 state = State.CLOSE_PENDING;
             } else if (localState != State.CLOSED) {
                 state = State.CLOSED;

driver-core/src/test/unit/com/mongodb/internal/operation/CursorResourceManagerTest.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2008-present MongoDB, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.mongodb.internal.operation;
+
+import com.mongodb.MongoNamespace;
+import com.mongodb.ServerCursor;
+import com.mongodb.internal.binding.AsyncConnectionSource;
+import com.mongodb.internal.binding.ReferenceCounted;
+import com.mongodb.internal.connection.Connection;
+import com.mongodb.internal.mockito.MongoMockito;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.mockito.Mockito.when;
+
+final class CursorResourceManagerTest {
+    @Test
+    void doubleCloseExecutedConcurrentlyWithOperationBeingInProgressShouldNotFail() {
+        CursorResourceManager<?, ?> cursorResourceManager = new CursorResourceManager<ReferenceCounted, ReferenceCounted>(
+                new MongoNamespace("db", "coll"),
+                MongoMockito.mock(AsyncConnectionSource.class, mock -> {
+                    when(mock.retain()).thenReturn(mock);
+                    when(mock.release()).thenReturn(1);
+                }),
+                null,
+                MongoMockito.mock(ServerCursor.class)) {
+            @Override
+            void markAsPinned(final ReferenceCounted connectionToPin, final Connection.PinningMode pinningMode) {
+            }
+
+            @Override
+            void doClose() {
+            }
+        };
+        cursorResourceManager.tryStartOperation();
+        try {
+            assertDoesNotThrow(() -> {
+                cursorResourceManager.close();
+                cursorResourceManager.close();
+                cursorResourceManager.setServerCursor(null);
+            });
+        } finally {
+            cursorResourceManager.endOperation();
+        }
+    }
+}