Merge pull request #1569 from guyuezheng/master

[ISSUE #1568] rocketmq need enhance stability when commitlog broken

broker/src/main/java/org/apache/rocketmq/broker/transaction/queue/TransactionalMessageBridge.java

@@ -131,6 +131,9 @@ public class TransactionalMessageBridge {
                     this.brokerController.getBrokerStatsManager().incGroupGetSize(group, topic,
                         getMessageResult.getBufferTotalSize());
                     this.brokerController.getBrokerStatsManager().incBrokerGetNums(getMessageResult.getMessageCount());
+                    if (foundList == null || foundList.size() == 0) {
+                        break;
+                    }
                     this.brokerController.getBrokerStatsManager().recordDiskFallBehindTime(group, topic, queueId,
                         this.brokerController.getMessageStore().now() - foundList.get(foundList.size() - 1)
                             .getStoreTimestamp());
@@ -175,9 +178,11 @@ public class TransactionalMessageBridge {
         try {
             List<ByteBuffer> messageBufferList = getMessageResult.getMessageBufferList();
             for (ByteBuffer bb : messageBufferList) {
-                MessageExt msgExt = MessageDecoder.decode(bb);
+                MessageExt msgExt = MessageDecoder.decode(bb, true, false);
+                if (msgExt != null) {
                     foundList.add(msgExt);
                 }
+            }
 
         } finally {
             getMessageResult.release();

broker/src/test/java/org/apache/rocketmq/broker/transaction/queue/TransactionalMessageBridgeTest.java

@@ -167,6 +167,24 @@ public class TransactionalMessageBridgeTest {
         assertThat(messageExt).isNotNull();
     }
 
+    @Test
+    public void testGetHalfMessageStatusFound() {
+        when(messageStore
+                .getMessage(anyString(), anyString(), anyInt(), anyLong(), anyInt(), ArgumentMatchers.nullable(MessageFilter.class)))
+                .thenReturn(createGetMessageResult(GetMessageStatus.FOUND));
+        PullResult result = transactionBridge.getHalfMessage(0, 0, 1);
+        assertThat(result.getPullStatus()).isEqualTo(PullStatus.FOUND);
+    }
+
+    @Test
+    public void testGetHalfMessageNull() {
+        when(messageStore
+                .getMessage(anyString(), anyString(), anyInt(), anyLong(), anyInt(), ArgumentMatchers.nullable(MessageFilter.class)))
+                .thenReturn(null);
+        PullResult result = transactionBridge.getHalfMessage(0, 0, 1);
+        assertThat(result).isNull();
+    }
+
     private GetMessageResult createGetMessageResult(GetMessageStatus status) {
         GetMessageResult getMessageResult = new GetMessageResult();
         getMessageResult.setStatus(status);