[fix] [ml] There are two same-named managed ledgers in the one broker

Author: poorbarcode

managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedLedgerFactoryImpl.java

@@ -504,9 +504,19 @@ public void openReadOnlyManagedLedgerFailed(ManagedLedgerException exception, Ob
     }
 
     void close(ManagedLedger ledger) {
-        // Remove the ledger from the internal factory cache
-        ledgers.remove(ledger.getName());
-        entryCacheManager.removeEntryCache(ledger.getName());
+        // If the future in map is not done or has exceptionally complete, it means that @param-ledger is not in the
+        // map.
+        CompletableFuture<ManagedLedgerImpl> ledgerFuture = ledgers.get(ledger.getName());
+        if (!ledgerFuture.isDone() || ledgerFuture.isCompletedExceptionally()){
+            return;
+        }
+        if (ledgerFuture.join() != ledger){
+            return;
+        }
+        // Remove the ledger from the internal factory cache.
+        if (ledgers.remove(ledger.getName(), ledgerFuture)) {
+            entryCacheManager.removeEntryCache(ledger.getName());
+        }
     }
 
     public CompletableFuture<Void> shutdownAsync() throws ManagedLedgerException {

managed-ledger/src/test/java/org/apache/bookkeeper/mledger/impl/DuplicateManagedLedgerTest.java

@@ -0,0 +1,186 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.bookkeeper.mledger.impl;
+
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.spy;
+import io.netty.buffer.ByteBuf;
+import java.nio.charset.Charset;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.bookkeeper.client.LedgerHandle;
+import org.apache.bookkeeper.mledger.AsyncCallbacks;
+import org.apache.bookkeeper.mledger.ManagedLedger;
+import org.apache.bookkeeper.mledger.ManagedLedgerConfig;
+import org.apache.bookkeeper.mledger.ManagedLedgerException;
+import org.apache.bookkeeper.mledger.Position;
+import org.apache.bookkeeper.test.MockedBookKeeperTestCase;
+import org.awaitility.Awaitility;
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+@Slf4j
+public class LedgerLostTest extends MockedBookKeeperTestCase {
+
+    private void triggerLedgerRollover(ManagedLedger ledger, int maxEntriesPerLedger) {
+        new Thread(() -> {
+            int writeLedgerCount = 2;
+            for (int i = 0; i < writeLedgerCount; i++) {
+                for (int j = 0; j < maxEntriesPerLedger; j++) {
+                    byte[] data = String.format("%s_%s", i, j).getBytes(Charset.defaultCharset());
+                    Object ctx = "";
+                    ledger.asyncAddEntry(data, new AsyncCallbacks.AddEntryCallback() {
+                        @Override
+                        public void addComplete(Position position, ByteBuf entryData, Object ctx) {
+
+                        }
+
+                        @Override
+                        public void addFailed(ManagedLedgerException exception, Object ctx) {
+
+                        }
+                    }, ctx);
+                }
+            }
+        }).start();
+    }
+
+    @Test
+    public void testConcurrentCloseLedgerAndSwitchLedgerForReproduceIssue() throws Exception {
+        String managedLedgerName = "lg_" + UUID.randomUUID().toString().replaceAll("-", "_");
+        int maxEntriesPerLedger = 5;
+        ManagedLedgerConfig config = new ManagedLedgerConfig();
+        config.setThrottleMarkDelete(1);
+        config.setMaximumRolloverTime(Integer.MAX_VALUE, TimeUnit.SECONDS);
+        config.setMaxEntriesPerLedger(5);
+        final ProcessCoordinator processCoordinator = new ProcessCoordinator();
+
+        // call "switch ledger" and "managedLedger.close" concurrently.
+        final ManagedLedgerImpl managedLedger1 = (ManagedLedgerImpl) factory.open(managedLedgerName, config);
+        waitManagedLedgerStateEquals(managedLedger1, ManagedLedgerImpl.State.LedgerOpened);
+        processCoordinator.on();
+        final ManagedLedgerImpl sequentiallyManagedLedger1 =
+                makeManagedLedgerWorksWithStrictlySequentially(managedLedger1, processCoordinator);
+        triggerLedgerRollover(sequentiallyManagedLedger1, maxEntriesPerLedger);
+        sequentiallyManagedLedger1.close();
+        waitManagedLedgerStateNotEquals(managedLedger1, ManagedLedgerImpl.State.Closed);
+
+        // create managedLedger2.
+        final ManagedLedgerImpl managedLedger2 = (ManagedLedgerImpl) factory.open(managedLedgerName, config);
+        Assert.assertEquals(factory.ledgers.size(), 1);
+        Assert.assertNotEquals(managedLedger1, managedLedger2);
+        waitManagedLedgerInFactoryEquals(managedLedger2);
+        processCoordinator.off();
+        managedLedger1.close();
+        waitManagedLedgerStateEquals(managedLedger1, ManagedLedgerImpl.State.Closed);
+        Assert.assertFalse(factory.ledgers.isEmpty());
+        Assert.assertEquals(factory.ledgers.get(managedLedger2.getName()).join(), managedLedger2);
+
+        // cleanup.
+        managedLedger2.close();
+    }
+
+    private ManagedLedgerImpl makeManagedLedgerWorksWithStrictlySequentially(ManagedLedgerImpl originalManagedLedger,
+                                                                             ProcessCoordinator processCoordinator)
+            throws Exception {
+        ManagedLedgerImpl sequentiallyManagedLedger = spy(originalManagedLedger);
+        // step-1.
+        doAnswer(invocation -> {
+            synchronized (originalManagedLedger) {
+                // step-3.
+                // Wait for `managedLedger.close`, then do task: "asyncCreateLedger()".
+                // Because the thread selector in "managedLedger.executor" is random logic, so it is possible to fail.
+                // Adding 1000 tasks to stuck the executor gives a high chance of success.
+                for (int i = 0; i < 1000; i++) {
+                    originalManagedLedger.getExecutor().execute(() -> {
+                        processCoordinator.waitPreviousAndSetStep(3);
+                    });
+                }
+                LedgerHandle lh = (LedgerHandle) invocation.getArguments()[0];
+                processCoordinator.waitPreviousAndSetStep(1);
+                originalManagedLedger.ledgerClosed(lh);
+            }
+            return null;
+        }).when(sequentiallyManagedLedger).ledgerClosed(any(LedgerHandle.class));
+        // step-2.
+        doAnswer(invocation -> {
+            processCoordinator.waitPreviousAndSetStep(2);
+            originalManagedLedger.close();
+            return null;
+        }).when(sequentiallyManagedLedger).close();
+        return sequentiallyManagedLedger;
+    }
+
+    private void waitManagedLedgerInFactoryEquals(ManagedLedgerImpl managedLedger){
+        Awaitility.await().until(() -> {
+            CompletableFuture<ManagedLedgerImpl> managedLedgerFuture = factory.ledgers.get(managedLedger.getName());
+            return managedLedgerFuture.join() == managedLedger;
+        });
+    }
+
+    private void waitManagedLedgerStateEquals(ManagedLedgerImpl managedLedger, ManagedLedgerImpl.State expectedStat){
+        Awaitility.await().untilAsserted(() ->
+                Assert.assertTrue(managedLedger.getState() == expectedStat));
+    }
+
+    private void waitManagedLedgerStateNotEquals(ManagedLedgerImpl managedLedger, ManagedLedgerImpl.State expectedStat){
+        Awaitility.await().untilAsserted(() ->
+                Assert.assertTrue(managedLedger.getState() != expectedStat));
+    }
+
+    private static class ProcessCoordinator {
+
+        private AtomicBoolean latch = new AtomicBoolean(true);
+
+        private AtomicInteger step = new AtomicInteger();
+
+        public boolean waitPreviousAndSetStep(int currentStep){
+            if (!latch.get()){
+                return false;
+            }
+            int previousStep = currentStep - 1;
+            while (true){
+                if (step.compareAndSet(previousStep, currentStep)){
+                    return true;
+                }
+                if (step.get() >= currentStep){
+                    return false;
+                }
+                try {
+                    Thread.sleep(20);
+                } catch (InterruptedException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+        }
+
+        public void on() {
+            latch.set(true);
+        }
+
+        public void off() {
+            latch.set(false);
+        }
+    }
+}