1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19 package org.apache.hadoop.hbase.client;
20
21 import static org.mockito.Matchers.anyObject;
22 import static org.mockito.Mockito.doReturn;
23 import static org.mockito.Mockito.mock;
24 import static org.mockito.Mockito.reset;
25 import static org.mockito.Mockito.times;
26 import static org.mockito.Mockito.verify;
27 import static org.mockito.Mockito.when;
28
29 import java.math.BigDecimal;
30 import java.util.List;
31 import java.util.NavigableMap;
32 import java.util.Random;
33
34 import org.apache.commons.logging.Log;
35 import org.apache.commons.logging.LogFactory;
36 import org.apache.hadoop.conf.Configuration;
37 import org.apache.hadoop.hbase.TableName;
38 import org.apache.hadoop.hbase.HBaseTestingUtility;
39 import org.apache.hadoop.hbase.HConstants;
40 import org.apache.hadoop.hbase.HRegionInfo;
41 import org.apache.hadoop.hbase.testclassification.MediumTests;
42 import org.apache.hadoop.hbase.ServerName;
43 import org.apache.hadoop.hbase.catalog.CatalogTracker;
44 import org.apache.hadoop.hbase.catalog.MetaEditor;
45 import org.apache.hadoop.hbase.util.Bytes;
46 import org.apache.hadoop.hbase.util.StoppableImplementation;
47 import org.apache.hadoop.hbase.util.Threads;
48 import org.apache.hadoop.util.StringUtils;
49 import org.junit.After;
50 import org.junit.Assert;
51 import org.junit.Test;
52 import org.junit.experimental.categories.Category;
53 @Category(MediumTests.class)
54 public class TestMetaScanner {
55 final Log LOG = LogFactory.getLog(getClass());
56 private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
57
58 public void setUp() throws Exception {
59 TEST_UTIL.startMiniCluster(1);
60 }
61
62 @After
63 public void tearDown() throws Exception {
64 TEST_UTIL.shutdownMiniCluster();
65 }
66
67 @Test
68 public void testMetaScanner() throws Exception {
69 LOG.info("Starting testMetaScanner");
70 setUp();
71 final TableName TABLENAME =
72 TableName.valueOf("testMetaScanner");
73 final byte[] FAMILY = Bytes.toBytes("family");
74 TEST_UTIL.createTable(TABLENAME, FAMILY);
75 Configuration conf = TEST_UTIL.getConfiguration();
76 HTable table = new HTable(conf, TABLENAME);
77 TEST_UTIL.createMultiRegions(conf, table, FAMILY,
78 new byte[][]{
79 HConstants.EMPTY_START_ROW,
80 Bytes.toBytes("region_a"),
81 Bytes.toBytes("region_b")});
82
83 TEST_UTIL.countRows(table);
84
85 MetaScanner.MetaScannerVisitor visitor =
86 mock(MetaScanner.MetaScannerVisitor.class);
87 doReturn(true).when(visitor).processRow((Result)anyObject());
88
89
90 MetaScanner.metaScan(conf, null, visitor, TABLENAME);
91 verify(visitor, times(3)).processRow((Result)anyObject());
92
93
94
95 reset(visitor);
96 doReturn(true).when(visitor).processRow((Result)anyObject());
97 MetaScanner.metaScan(conf, visitor, TABLENAME, HConstants.EMPTY_BYTE_ARRAY, 1000);
98 verify(visitor, times(3)).processRow((Result)anyObject());
99
100
101
102 reset(visitor);
103 doReturn(true).when(visitor).processRow((Result)anyObject());
104 MetaScanner.metaScan(conf, visitor, TABLENAME, Bytes.toBytes("region_ac"), 1000);
105 verify(visitor, times(2)).processRow((Result)anyObject());
106
107
108 reset(visitor);
109 doReturn(true).when(visitor).processRow((Result)anyObject());
110 MetaScanner.metaScan(conf, visitor, TABLENAME, Bytes.toBytes("region_ac"), 1);
111 verify(visitor, times(1)).processRow((Result)anyObject());
112 table.close();
113 }
114
115 @Test
116 public void testConcurrentMetaScannerAndCatalogJanitor() throws Throwable {
117
118
119
120
121 TEST_UTIL.getConfiguration().setLong("hbase.catalogjanitor.interval", 500);
122 setUp();
123
124 final long runtime = 30 * 1000;
125 LOG.info("Starting testConcurrentMetaScannerAndCatalogJanitor");
126 final TableName TABLENAME =
127 TableName.valueOf("testConcurrentMetaScannerAndCatalogJanitor");
128 final byte[] FAMILY = Bytes.toBytes("family");
129 TEST_UTIL.createTable(TABLENAME, FAMILY);
130 final CatalogTracker catalogTracker = mock(CatalogTracker.class);
131 when(catalogTracker.getConnection()).thenReturn(TEST_UTIL.getHBaseAdmin().getConnection());
132
133 class RegionMetaSplitter extends StoppableImplementation implements Runnable {
134 Random random = new Random();
135 Throwable ex = null;
136 @Override
137 public void run() {
138 while (!isStopped()) {
139 try {
140 List<HRegionInfo> regions = MetaScanner.listAllRegions(
141 TEST_UTIL.getConfiguration(), false);
142
143
144 HRegionInfo parent = regions.get(random.nextInt(regions.size()));
145 if (parent == null || !TABLENAME.equals(parent.getTable())) {
146 continue;
147 }
148
149 long startKey = 0, endKey = Long.MAX_VALUE;
150 byte[] start = parent.getStartKey();
151 byte[] end = parent.getEndKey();
152 if (!Bytes.equals(HConstants.EMPTY_START_ROW, parent.getStartKey())) {
153 startKey = Bytes.toLong(parent.getStartKey());
154 }
155 if (!Bytes.equals(HConstants.EMPTY_END_ROW, parent.getEndKey())) {
156 endKey = Bytes.toLong(parent.getEndKey());
157 }
158 if (startKey == endKey) {
159 continue;
160 }
161
162 long midKey = BigDecimal.valueOf(startKey).add(BigDecimal.valueOf(endKey))
163 .divideToIntegralValue(BigDecimal.valueOf(2)).longValue();
164
165 HRegionInfo splita = new HRegionInfo(TABLENAME,
166 start,
167 Bytes.toBytes(midKey));
168 HRegionInfo splitb = new HRegionInfo(TABLENAME,
169 Bytes.toBytes(midKey),
170 end);
171
172 MetaEditor.splitRegion(catalogTracker, parent, splita, splitb, ServerName.valueOf("fooserver", 1, 0));
173
174 Threads.sleep(random.nextInt(200));
175 } catch (Throwable e) {
176 ex = e;
177 Assert.fail(StringUtils.stringifyException(e));
178 }
179 }
180 }
181 void rethrowExceptionIfAny() throws Throwable {
182 if (ex != null) { throw ex; }
183 }
184 }
185
186 class MetaScannerVerifier extends StoppableImplementation implements Runnable {
187 Random random = new Random();
188 Throwable ex = null;
189 @Override
190 public void run() {
191 while(!isStopped()) {
192 try {
193 NavigableMap<HRegionInfo, ServerName> regions =
194 MetaScanner.allTableRegions(TEST_UTIL.getConfiguration(), null, TABLENAME, false);
195
196 LOG.info("-------");
197 byte[] lastEndKey = HConstants.EMPTY_START_ROW;
198 for (HRegionInfo hri: regions.navigableKeySet()) {
199 long startKey = 0, endKey = Long.MAX_VALUE;
200 if (!Bytes.equals(HConstants.EMPTY_START_ROW, hri.getStartKey())) {
201 startKey = Bytes.toLong(hri.getStartKey());
202 }
203 if (!Bytes.equals(HConstants.EMPTY_END_ROW, hri.getEndKey())) {
204 endKey = Bytes.toLong(hri.getEndKey());
205 }
206 LOG.info("start:" + startKey + " end:" + endKey + " hri:" + hri);
207 Assert.assertTrue("lastEndKey=" + Bytes.toString(lastEndKey) + ", startKey=" +
208 Bytes.toString(hri.getStartKey()), Bytes.equals(lastEndKey, hri.getStartKey()));
209 lastEndKey = hri.getEndKey();
210 }
211 Assert.assertTrue(Bytes.equals(lastEndKey, HConstants.EMPTY_END_ROW));
212 LOG.info("-------");
213 Threads.sleep(10 + random.nextInt(50));
214 } catch (Throwable e) {
215 ex = e;
216 Assert.fail(StringUtils.stringifyException(e));
217 }
218 }
219 }
220 void rethrowExceptionIfAny() throws Throwable {
221 if (ex != null) { throw ex; }
222 }
223 }
224
225 RegionMetaSplitter regionMetaSplitter = new RegionMetaSplitter();
226 MetaScannerVerifier metaScannerVerifier = new MetaScannerVerifier();
227
228 Thread regionMetaSplitterThread = new Thread(regionMetaSplitter);
229 Thread metaScannerVerifierThread = new Thread(metaScannerVerifier);
230
231 regionMetaSplitterThread.start();
232 metaScannerVerifierThread.start();
233
234 Threads.sleep(runtime);
235
236 regionMetaSplitter.stop("test finished");
237 metaScannerVerifier.stop("test finished");
238
239 regionMetaSplitterThread.join();
240 metaScannerVerifierThread.join();
241
242 regionMetaSplitter.rethrowExceptionIfAny();
243 metaScannerVerifier.rethrowExceptionIfAny();
244 }
245
246 }
247