From e031dc8d343817bfccb2829d739fd745ce124874 Mon Sep 17 00:00:00 2001
From: Michael Stack <stack@apache.org>
Date: Tue, 24 Apr 2012 05:55:55 +0000
Subject: [PATCH] HBASE-5849 On first cluster startup, RS aborts if root znode
 is not available; REVERT

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1329560 13f79535-47bb-0310-9956-ffa450edef68
---
 .../hbase/regionserver/HRegionServer.java     |   6 +
 .../hadoop/hbase/TestClusterBootOrder.java    | 118 ------------------
 2 files changed, 6 insertions(+), 118 deletions(-)

diff --git a/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java b/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
index 36ea2ec5e41..025fc53d0e9 100644
--- a/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
+++ b/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
@@ -535,6 +535,12 @@ public class HRegionServer extends RegionServer
    */
   private void blockAndCheckIfStopped(ZooKeeperNodeTracker tracker)
       throws IOException, InterruptedException {
+    if (false == tracker.checkIfBaseNodeAvailable()) {
+      String errorMsg = "Check the value configured in 'zookeeper.znode.parent'. "
+          + "There could be a mismatch with the one configured in the master.";
+      LOG.error(errorMsg);
+      abort(errorMsg);
+    }
     while (tracker.blockUntilAvailable(this.msgInterval, false) == null) {
       if (this.stopped) {
         throw new IOException("Received the shutdown message while waiting.");
diff --git a/src/test/java/org/apache/hadoop/hbase/TestClusterBootOrder.java b/src/test/java/org/apache/hadoop/hbase/TestClusterBootOrder.java
index 3bbbdf2826f..e69de29bb2d 100644
--- a/src/test/java/org/apache/hadoop/hbase/TestClusterBootOrder.java
+++ b/src/test/java/org/apache/hadoop/hbase/TestClusterBootOrder.java
@@ -1,118 +0,0 @@
-/**
- * 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;
-
-import static org.junit.Assert.assertTrue;
-
-import org.apache.hadoop.hbase.util.JVMClusterUtil.MasterThread;
-import org.apache.hadoop.hbase.util.JVMClusterUtil.RegionServerThread;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.experimental.categories.Category;
-
-/**
- * Tests the boot order indifference between regionserver and master
- */
-@Category(MediumTests.class)
-public class TestClusterBootOrder {
-
-  private static final long SLEEP_INTERVAL = 1000;
-  private static final long SLEEP_TIME = 4000;
-
-  private HBaseTestingUtility testUtil;
-  private LocalHBaseCluster cluster;
-  private RegionServerThread rs;
-  private MasterThread master;
-
-  @Before
-  public void setUp() throws Exception {
-    testUtil = new HBaseTestingUtility();
-    testUtil.startMiniZKCluster(1);
-    cluster = new LocalHBaseCluster(testUtil.getConfiguration(), 0, 0);
-  }
-
-  @After
-  public void tearDown() throws Exception {
-    cluster.shutdown();
-    cluster.join();
-    testUtil.shutdownMiniZKCluster();
-  }
-
-  private void startRegionServer() throws Exception {
-    rs = cluster.addRegionServer();
-    rs.start();
-
-    for (int i=0; i * SLEEP_INTERVAL < SLEEP_TIME ;i++) {
-      //we cannot block on wait for rs at this point , since master is not up.
-      Thread.sleep(SLEEP_INTERVAL);
-      assertTrue(rs.isAlive());
-    }
-  }
-
-  private void startMaster() throws Exception {
-    master = cluster.addMaster();
-    master.start();
-
-    for (int i=0; i * SLEEP_INTERVAL < SLEEP_TIME ;i++) {
-      Thread.sleep(SLEEP_INTERVAL);
-      assertTrue(master.isAlive());
-    }
-  }
-
-  private void waitForClusterOnline() {
-    while (true) {
-      if (master.getMaster().isInitialized()) {
-        break;
-      }
-      try {
-        Thread.sleep(100);
-      } catch (InterruptedException ignored) {
-        // Keep waiting
-      }
-    }
-    rs.waitForServerOnline();
-  }
-
-  /**
-   * Tests launching the cluster by first starting regionserver, and then the master
-   * to ensure that it does not matter which is started first.
-   */
-  @Test(timeout = 12000)
-  public void testBootRegionServerFirst() throws Exception {
-    startRegionServer();
-    startMaster();
-    waitForClusterOnline();
-  }
-
-  /**
-   * Tests launching the cluster by first starting master, and then the regionserver
-   * to ensure that it does not matter which is started first.
-   */
-  @Test(timeout = 12000)
-  public void testBootMasterFirst() throws Exception {
-    startMaster();
-    startRegionServer();
-    waitForClusterOnline();
-  }
-
-  @org.junit.Rule
-  public org.apache.hadoop.hbase.ResourceCheckerJUnitRule cu =
-    new org.apache.hadoop.hbase.ResourceCheckerJUnitRule();
-}