HBASE-20127 Add UT for serial replication after failover

hbase-server/src/test/java/org/apache/hadoop/hbase/replication/SerialReplicationTestBase.java

@@ -113,6 +113,7 @@ public class SerialReplicationTestBase {
   @BeforeClass
   public static void setUpBeforeClass() throws Exception {
     UTIL.getConfiguration().setInt("replication.source.nb.capacity", 10);
+    UTIL.getConfiguration().setLong("replication.sleep.before.failover", 1000);
     UTIL.startMiniCluster(3);
     // disable balancer
     UTIL.getAdmin().balancerSwitch(false, true);
@@ -200,6 +201,11 @@ public class SerialReplicationTestBase {
     });
   }
 
+  protected final void enablePeerAndWaitUntilReplicationDone(int expectedEntries) throws Exception {
+    UTIL.getAdmin().enableReplicationPeer(PEER_ID);
+    waitUntilReplicationDone(expectedEntries);
+  }
+
   protected final void addPeer(boolean enabled) throws IOException {
     UTIL.getAdmin().addReplicationPeer(PEER_ID,
       ReplicationPeerConfig.newBuilder().setClusterKey("127.0.0.1:2181:/hbase")
@@ -221,6 +227,7 @@ public class SerialReplicationTestBase {
         assertTrue(
           "Sequence id go backwards from " + seqId + " to " + entry.getKey().getSequenceId(),
           entry.getKey().getSequenceId() >= seqId);
+        seqId = entry.getKey().getSequenceId();
         count++;
       }
       assertEquals(expectedEntries, count);

hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestSerialReplication.java

@@ -63,11 +63,6 @@ public class TestSerialReplication extends SerialReplicationTestBase {
     addPeer(false);
   }
 
-  private void enablePeerAndWaitUntilReplicationDone(int expectedEntries) throws Exception {
-    UTIL.getAdmin().enableReplicationPeer(PEER_ID);
-    waitUntilReplicationDone(expectedEntries);
-  }
-
   @Test
   public void testRegionMove() throws Exception {
     TableName tableName = TableName.valueOf(name.getMethodName());

hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestSerialReplicationFailover.java

@@ -0,0 +1,76 @@
+/**
+ * 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.hadoop.hbase.replication;
+
+import java.io.IOException;
+import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
+import org.apache.hadoop.hbase.client.Put;
+import org.apache.hadoop.hbase.client.Table;
+import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
+import org.apache.hadoop.hbase.testclassification.MediumTests;
+import org.apache.hadoop.hbase.testclassification.ReplicationTests;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.CommonFSUtils.StreamLacksCapabilityException;
+import org.apache.hadoop.hbase.util.JVMClusterUtil.RegionServerThread;
+import org.junit.Before;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+@Category({ ReplicationTests.class, MediumTests.class })
+public class TestSerialReplicationFailover extends SerialReplicationTestBase {
+
+  @ClassRule
+  public static final HBaseClassTestRule CLASS_RULE =
+    HBaseClassTestRule.forClass(TestSerialReplicationFailover.class);
+
+  @Before
+  public void setUp() throws IOException, StreamLacksCapabilityException {
+    setupWALWriter();
+    // add in disable state, so later when enabling it all sources will start push together.
+    addPeer(false);
+  }
+
+  @Test
+  public void testKillRS() throws Exception {
+    TableName tableName = TableName.valueOf(name.getMethodName());
+    UTIL.getAdmin().createTable(
+      TableDescriptorBuilder.newBuilder(tableName).setColumnFamily(ColumnFamilyDescriptorBuilder
+        .newBuilder(CF).setScope(HConstants.REPLICATION_SCOPE_GLOBAL).build()).build());
+    UTIL.waitTableAvailable(tableName);
+    try (Table table = UTIL.getConnection().getTable(tableName)) {
+      for (int i = 0; i < 100; i++) {
+        table.put(new Put(Bytes.toBytes(i)).addColumn(CF, CQ, Bytes.toBytes(i)));
+      }
+    }
+    RegionServerThread thread = UTIL.getMiniHBaseCluster().getRegionServerThreads().stream()
+      .filter(t -> !t.getRegionServer().getRegions(tableName).isEmpty()).findFirst().get();
+    thread.getRegionServer().abort("for testing");
+    thread.join();
+    try (Table table = UTIL.getConnection().getTable(tableName)) {
+      for (int i = 100; i < 200; i++) {
+        table.put(new Put(Bytes.toBytes(i)).addColumn(CF, CQ, Bytes.toBytes(i)));
+      }
+    }
+    enablePeerAndWaitUntilReplicationDone(200);
+    checkOrder(200);
+  }
+}