From b996b19d8e02787b245f6bdf551cc687e861f36c Mon Sep 17 00:00:00 2001
From: Zhihong Yu <tedyu@apache.org>
Date: Thu, 17 Jan 2013 17:35:16 +0000
Subject: [PATCH] HBASE-7034 Bad version, failed OPENING to OPENED but master
 thinks it is open anyways (Anoop)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1434800 13f79535-47bb-0310-9956-ffa450edef68
---
 .../zookeeper/TestRecoverableZooKeeper.java   | 123 ++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 hbase-server/src/test/java/org/apache/hadoop/hbase/zookeeper/TestRecoverableZooKeeper.java

diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/zookeeper/TestRecoverableZooKeeper.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/zookeeper/TestRecoverableZooKeeper.java
new file mode 100644
index 00000000000..a7b0c4b34c7
--- /dev/null
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/zookeeper/TestRecoverableZooKeeper.java
@@ -0,0 +1,123 @@
+/*
+ * 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.zookeeper;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.lang.reflect.Field;
+import java.util.Properties;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.Abortable;
+import org.apache.hadoop.hbase.HBaseTestingUtility;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.MediumTests;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.zookeeper.CreateMode;
+import org.apache.zookeeper.KeeperException;
+import org.apache.zookeeper.Watcher;
+import org.apache.zookeeper.ZooDefs.Ids;
+import org.apache.zookeeper.ZooKeeper;
+import org.apache.zookeeper.data.Stat;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+@Category(MediumTests.class)
+public class TestRecoverableZooKeeper {
+
+  private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
+
+  Abortable abortable = new Abortable() {
+    @Override
+    public void abort(String why, Throwable e) {
+
+    }
+
+    @Override
+    public boolean isAborted() {
+      return false;
+    }
+  };
+
+  @BeforeClass
+  public static void setUpBeforeClass() throws Exception {
+    TEST_UTIL.startMiniZKCluster();
+  }
+
+  @AfterClass
+  public static void tearDownAfterClass() throws Exception {
+    TEST_UTIL.shutdownMiniZKCluster();
+  }
+
+  @Test
+  public void testSetDataVersionMismatchInLoop() throws Exception {
+    String znode = "/hbase/unassigned/9af7cfc9b15910a0b3d714bf40a3248f";
+    Configuration conf = TEST_UTIL.getConfiguration();
+    Properties properties = ZKConfig.makeZKProps(conf);
+    ZooKeeperWatcher zkw = new ZooKeeperWatcher(conf, "testSetDataVersionMismatchInLoop",
+        abortable, true);
+    String ensemble = ZKConfig.getZKQuorumServersString(properties);
+    RecoverableZooKeeper rzk = ZKUtil.connect(conf, ensemble, zkw);
+    rzk.create(znode, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
+    rzk.setData(znode, "OPENING".getBytes(), 0);
+    Field zkField = RecoverableZooKeeper.class.getDeclaredField("zk");
+    zkField.setAccessible(true);
+    int timeout = conf.getInt(HConstants.ZK_SESSION_TIMEOUT, HConstants.DEFAULT_ZK_SESSION_TIMEOUT);
+    ZookeeperStub zkStub = new ZookeeperStub(ensemble, timeout, zkw);
+    zkStub.setThrowExceptionInNumOperations(1);
+    zkField.set(rzk, zkStub);
+    byte[] opened = "OPENED".getBytes();
+    rzk.setData(znode, opened, 1);
+    byte[] data = rzk.getData(znode, false, new Stat());
+    assertTrue(Bytes.equals(opened, data));
+  }
+
+  class ZookeeperStub extends ZooKeeper {
+
+    private int throwExceptionInNumOperations;
+
+    public ZookeeperStub(String connectString, int sessionTimeout, Watcher watcher)
+        throws IOException {
+      super(connectString, sessionTimeout, watcher);
+    }
+
+    public void setThrowExceptionInNumOperations(int throwExceptionInNumOperations) {
+      this.throwExceptionInNumOperations = throwExceptionInNumOperations;
+    }
+
+    private void checkThrowKeeperException() throws KeeperException {
+      if (throwExceptionInNumOperations == 1) {
+        throwExceptionInNumOperations = 0;
+        throw new KeeperException.ConnectionLossException();
+      }
+      if (throwExceptionInNumOperations > 0)
+        throwExceptionInNumOperations--;
+    }
+
+    @Override
+    public Stat setData(String path, byte[] data, int version) throws KeeperException,
+        InterruptedException {
+      Stat stat = super.setData(path, data, version);
+      checkThrowKeeperException();
+      return stat;
+    }
+  }
+}