001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.master;
019
020import static org.junit.Assert.assertNotNull;
021import static org.junit.Assert.assertTrue;
022import static org.junit.Assert.fail;
023import java.util.Arrays;
024import java.util.stream.Stream;
025import java.util.stream.StreamSupport;
026import org.apache.hadoop.conf.Configuration;
027import org.apache.hadoop.hbase.HBaseClassTestRule;
028import org.apache.hadoop.hbase.HBaseTestingUtility;
029import org.apache.hadoop.hbase.HConstants;
030import org.apache.hadoop.hbase.StartMiniClusterOption;
031import org.apache.hadoop.hbase.TableName;
032import org.apache.hadoop.hbase.client.Connection;
033import org.apache.hadoop.hbase.client.Put;
034import org.apache.hadoop.hbase.client.Result;
035import org.apache.hadoop.hbase.client.ResultScanner;
036import org.apache.hadoop.hbase.client.Scan;
037import org.apache.hadoop.hbase.client.Table;
038import org.apache.hadoop.hbase.testclassification.LargeTests;
039import org.apache.hadoop.hbase.testclassification.MasterTests;
040import org.apache.hadoop.hbase.util.Bytes;
041import org.junit.After;
042import org.junit.Before;
043import org.junit.ClassRule;
044import org.junit.Rule;
045import org.junit.Test;
046import org.junit.experimental.categories.Category;
047import org.junit.rules.TestName;
048import org.slf4j.Logger;
049import org.slf4j.LoggerFactory;
050
051@Category({MasterTests.class, LargeTests.class})
052public class TestMasterRepairMode {
053
054  @ClassRule
055  public static final HBaseClassTestRule CLASS_RULE =
056      HBaseClassTestRule.forClass(TestMasterRepairMode.class);
057
058  @Rule
059  public TestName name = new TestName();
060
061  private static final Logger LOG = LoggerFactory.getLogger(TestMasterRepairMode.class);
062
063  private static final byte[] FAMILYNAME = Bytes.toBytes("fam");
064
065  private static HBaseTestingUtility TEST_UTIL;
066
067  @Before
068  public void setUp() throws Exception {
069    TEST_UTIL = new HBaseTestingUtility();
070  }
071
072  @After
073  public void tearDown() throws Exception {
074    TEST_UTIL.shutdownMiniCluster();
075  }
076
077  private void enableMaintenanceMode() {
078    Configuration c = TEST_UTIL.getConfiguration();
079    c.setBoolean(HMaster.MAINTENANCE_MODE, true);
080    c.setInt("hbase.master.init.timeout.localHBaseCluster", 30000);
081  }
082
083  @Test
084  public void testNewCluster() throws Exception {
085    enableMaintenanceMode();
086
087    TEST_UTIL.startMiniCluster(StartMiniClusterOption.builder()
088        .numRegionServers(0)
089        .numDataNodes(3)
090        .build());
091
092    Connection conn = TEST_UTIL.getConnection();
093    assertTrue(conn.getAdmin().isMasterInMaintenanceMode());
094
095    try (Table table = conn.getTable(TableName.META_TABLE_NAME);
096        ResultScanner scanner = table.getScanner(new Scan())) {
097      assertNotNull("Could not read meta.", scanner.next());
098    }
099  }
100
101  @Test
102  public void testExistingCluster() throws Exception {
103    TableName testRepairMode = TableName.valueOf(name.getMethodName());
104
105    TEST_UTIL.startMiniCluster();
106    Table t = TEST_UTIL.createTable(testRepairMode, FAMILYNAME);
107    Put p = new Put(Bytes.toBytes("r"));
108    p.addColumn(FAMILYNAME, Bytes.toBytes("c"), new byte[0]);
109    t.put(p);
110
111    TEST_UTIL.shutdownMiniHBaseCluster();
112
113    LOG.info("Starting master-only");
114
115    enableMaintenanceMode();
116    TEST_UTIL.startMiniHBaseCluster(StartMiniClusterOption.builder()
117        .numRegionServers(0).createRootDir(false).build());
118
119    Connection conn = TEST_UTIL.getConnection();
120    assertTrue(conn.getAdmin().isMasterInMaintenanceMode());
121
122    try (Table table = conn.getTable(TableName.META_TABLE_NAME);
123        ResultScanner scanner = table.getScanner(HConstants.TABLE_FAMILY);
124        Stream<Result> results = StreamSupport.stream(scanner.spliterator(), false)) {
125      assertTrue("Did not find user table records while reading hbase:meta",
126          results.anyMatch(r -> Arrays.equals(r.getRow(), testRepairMode.getName())));
127    }
128
129    try (Table table = conn.getTable(testRepairMode);
130        ResultScanner scanner = table.getScanner(new Scan())) {
131      scanner.next();
132      fail("Should not be able to access user-space tables in repair mode.");
133    } catch (Exception e) {
134      // Expected
135    }
136  }
137}