Fix the autorecovery failed replicate by add entry fenced error (apac…

…he#4163)

* Fix the autorecovery failed replicate by add entry fenced error
---

### Motivation

apache#3783 changed the recovery add request flags. It causes when
replication happening, if the ledger was fenced, the ledger
can not be recovered. Because the recovery add flag is not
added then the normal add is not allowed to a fenced ledger.

(cherry picked from commit eb233b0)

bookkeeper-server/src/main/java/org/apache/bookkeeper/client/LedgerFragmentReplicator.java

@@ -336,7 +336,7 @@ static Set<LedgerFragment> splitIntoSubFragments(LedgerHandle lh,
      *            New bookies we want to use to recover and replicate the ledger
      *            entries that were stored on the failed bookie.
      */
-    private void recoverLedgerFragmentEntry(final Long entryId,
+    void recoverLedgerFragmentEntry(final Long entryId,
             final LedgerHandle lh,
             final AsyncCallback.VoidCallback ledgerFragmentEntryMcb,
             final Set<BookieId> newBookies,
@@ -410,7 +410,7 @@ public void readComplete(int rc, LedgerHandle lh,
                                 lh.getLastAddConfirmed(), entry.getLength(),
                                 Unpooled.wrappedBuffer(data, 0, data.length),
                                 lh.getLedgerKey(),
-                                0
+                                BookieProtocol.FLAG_RECOVERY_ADD
                                 );
                 if (replicationThrottle != null) {
                     if (toSend instanceof ByteBuf) {

bookkeeper-server/src/test/java/org/apache/bookkeeper/client/TestLedgerFragmentReplicationWithMock.java

@@ -0,0 +1,111 @@
+/*
+ * 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.client;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyBoolean;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.when;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufAllocator;
+import io.netty.buffer.Unpooled;
+import java.lang.reflect.Field;
+import java.util.Enumeration;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.CountDownLatch;
+import org.apache.bookkeeper.client.impl.LedgerEntryImpl;
+import org.apache.bookkeeper.conf.ClientConfiguration;
+import org.apache.bookkeeper.net.BookieId;
+import org.apache.bookkeeper.proto.BookieClientImpl;
+import org.apache.bookkeeper.proto.BookieProtoEncoding;
+import org.apache.bookkeeper.proto.BookieProtocol;
+import org.apache.bookkeeper.proto.checksum.DigestManager;
+import org.apache.bookkeeper.proto.checksum.DummyDigestManager;
+import org.apache.commons.collections4.IteratorUtils;
+import org.apache.zookeeper.AsyncCallback;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+public class TestLedgerFragmentReplicationWithMock {
+
+    @Test
+    public void testRecoverLedgerFragmentEntrySendRightRequestWithFlag() throws Exception {
+        CountDownLatch latch = new CountDownLatch(1);
+        BookieClientImpl bookieClient = Mockito.mock(BookieClientImpl.class);
+        doAnswer(invocationOnMock -> {
+            ByteBuf toSend = invocationOnMock.getArgument(4);
+            BookieProtoEncoding.RequestEnDeCoderPreV3 deCoderPreV3 =
+                new BookieProtoEncoding.RequestEnDeCoderPreV3(null);
+            toSend.readerIndex(4);
+            BookieProtocol.ParsedAddRequest request = (BookieProtocol.ParsedAddRequest) deCoderPreV3.decode(toSend);
+
+            Field flagField = request.getClass().getSuperclass().getDeclaredField("flags");
+            flagField.setAccessible(true);
+            short flag = flagField.getShort(request);
+            assertEquals(flag, BookieProtocol.FLAG_RECOVERY_ADD);
+            latch.countDown();
+            return null;
+        }).when(bookieClient)
+            .addEntry(any(), anyLong(), any(), anyLong(), any(), any(), any(), anyInt(), anyBoolean(), any());
+
+        BookKeeper bkc = Mockito.mock(BookKeeper.class);
+        when(bkc.getBookieClient()).thenReturn(bookieClient);
+
+        LedgerHandle lh = Mockito.mock(LedgerHandle.class);
+        DummyDigestManager ds = new DummyDigestManager(1L, true, ByteBufAllocator.DEFAULT);
+        when(lh.getDigestManager()).thenReturn(ds);
+        when(lh.getLedgerKey()).thenReturn(DigestManager.generateMasterKey("".getBytes()));
+
+        ByteBuf data = Unpooled.wrappedBuffer(new byte[1024]);
+        LedgerEntry entry = new LedgerEntry(LedgerEntryImpl.create(1L, 1L, data.readableBytes(), data));
+        List<LedgerEntry> list = new LinkedList<>();
+        list.add(entry);
+        Enumeration<LedgerEntry> entries = IteratorUtils.asEnumeration(list.iterator());
+        doAnswer(invocation -> {
+            org.apache.bookkeeper.client.AsyncCallback.ReadCallback rc =
+                invocation.getArgument(2, org.apache.bookkeeper.client.AsyncCallback.ReadCallback.class);
+            rc.readComplete(0, lh, entries, null);
+            return null;
+        }).when(lh).asyncReadEntries(anyLong(), anyLong(), any(), any());
+
+        ClientConfiguration conf = new ClientConfiguration();
+        LedgerFragmentReplicator lfr = new LedgerFragmentReplicator(bkc, conf);
+
+        Set<BookieId> bookies = new HashSet<>();
+        bookies.add(BookieId.parse("127.0.0.1:3181"));
+
+        AsyncCallback.VoidCallback vc = new AsyncCallback.VoidCallback() {
+            @Override
+            public void processResult(int rc, String path, Object ctx) {
+            }
+        };
+
+        lfr.recoverLedgerFragmentEntry(1L, lh, vc, bookies, (lid, le) -> {});
+
+        latch.await();
+    }
+}