Java tutorial
/** * * 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.regionserver.wal; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertTrue; import static org.junit.Assert.fail; import java.io.IOException; import java.security.PrivilegedExceptionAction; import java.util.ArrayList; import java.util.List; import java.util.concurrent.atomic.AtomicBoolean; import java.util.concurrent.atomic.AtomicInteger; import java.util.concurrent.atomic.AtomicLong; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FileStatus; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path; import org.apache.hadoop.hbase.Cell; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.HBaseTestingUtility; import org.apache.hadoop.hbase.HColumnDescriptor; import org.apache.hadoop.hbase.HConstants; import org.apache.hadoop.hbase.HRegionInfo; import org.apache.hadoop.hbase.HTableDescriptor; import org.apache.hadoop.hbase.KeyValue; import org.apache.hadoop.hbase.MasterNotRunningException; import org.apache.hadoop.hbase.MediumTests; import org.apache.hadoop.hbase.MiniHBaseCluster; import org.apache.hadoop.hbase.ServerName; import org.apache.hadoop.hbase.TableName; import org.apache.hadoop.hbase.ZooKeeperConnectionException; import org.apache.hadoop.hbase.client.Delete; import org.apache.hadoop.hbase.client.Get; import org.apache.hadoop.hbase.client.HTable; import org.apache.hadoop.hbase.client.Put; import org.apache.hadoop.hbase.client.Result; import org.apache.hadoop.hbase.client.ResultScanner; import org.apache.hadoop.hbase.client.Scan; import org.apache.hadoop.hbase.master.HMaster; import org.apache.hadoop.hbase.monitoring.MonitoredTask; import org.apache.hadoop.hbase.regionserver.DefaultStoreEngine; import org.apache.hadoop.hbase.regionserver.DefaultStoreFlusher; import org.apache.hadoop.hbase.regionserver.FlushRequestListener; import org.apache.hadoop.hbase.regionserver.FlushRequester; import org.apache.hadoop.hbase.regionserver.HRegion; import org.apache.hadoop.hbase.regionserver.HRegionServer; import org.apache.hadoop.hbase.regionserver.MemStoreSnapshot; import org.apache.hadoop.hbase.regionserver.RegionScanner; import org.apache.hadoop.hbase.regionserver.RegionServerServices; import org.apache.hadoop.hbase.regionserver.Store; import org.apache.hadoop.hbase.security.User; import org.apache.hadoop.hbase.util.Bytes; import org.apache.hadoop.hbase.util.EnvironmentEdge; import org.apache.hadoop.hbase.util.EnvironmentEdgeManager; import org.apache.hadoop.hbase.util.FSUtils; import org.apache.hadoop.hbase.util.HFileTestUtil; import org.apache.hadoop.hbase.util.Pair; import org.junit.After; import org.junit.AfterClass; import org.junit.Before; import org.junit.BeforeClass; import org.junit.Test; import org.junit.experimental.categories.Category; import org.mockito.Mockito; /** * Test replay of edits out of a WAL split. */ @Category(MediumTests.class) public class TestWALReplay { public static final Log LOG = LogFactory.getLog(TestWALReplay.class); static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility(); private final EnvironmentEdge ee = EnvironmentEdgeManager.getDelegate(); private Path hbaseRootDir = null; private String logName; private Path oldLogDir; private Path logDir; private FileSystem fs; private Configuration conf; @BeforeClass public static void setUpBeforeClass() throws Exception { Configuration conf = TEST_UTIL.getConfiguration(); conf.setBoolean("dfs.support.append", true); // The below config supported by 0.20-append and CDH3b2 conf.setInt("dfs.client.block.recovery.retries", 2); TEST_UTIL.startMiniCluster(3); Path hbaseRootDir = TEST_UTIL.getDFSCluster().getFileSystem().makeQualified(new Path("/hbase")); LOG.info("hbase.rootdir=" + hbaseRootDir); FSUtils.setRootDir(conf, hbaseRootDir); } @AfterClass public static void tearDownAfterClass() throws Exception { TEST_UTIL.shutdownMiniCluster(); } @Before public void setUp() throws Exception { this.conf = HBaseConfiguration.create(TEST_UTIL.getConfiguration()); this.fs = TEST_UTIL.getDFSCluster().getFileSystem(); this.hbaseRootDir = FSUtils.getRootDir(this.conf); this.oldLogDir = new Path(this.hbaseRootDir, HConstants.HREGION_OLDLOGDIR_NAME); this.logName = HConstants.HREGION_LOGDIR_NAME; this.logDir = new Path(this.hbaseRootDir, logName); if (TEST_UTIL.getDFSCluster().getFileSystem().exists(this.hbaseRootDir)) { TEST_UTIL.getDFSCluster().getFileSystem().delete(this.hbaseRootDir, true); } } @After public void tearDown() throws Exception { TEST_UTIL.getDFSCluster().getFileSystem().delete(this.hbaseRootDir, true); } /* * @param p Directory to cleanup */ private void deleteDir(final Path p) throws IOException { if (this.fs.exists(p)) { if (!this.fs.delete(p, true)) { throw new IOException("Failed remove of " + p); } } } /** * * @throws Exception */ @Test public void testReplayEditsAfterRegionMovedWithMultiCF() throws Exception { final TableName tableName = TableName.valueOf("testReplayEditsAfterRegionMovedWithMultiCF"); byte[] family1 = Bytes.toBytes("cf1"); byte[] family2 = Bytes.toBytes("cf2"); byte[] qualifier = Bytes.toBytes("q"); byte[] value = Bytes.toBytes("testV"); byte[][] familys = { family1, family2 }; TEST_UTIL.createTable(tableName, familys); HTable htable = new HTable(TEST_UTIL.getConfiguration(), tableName); Put put = new Put(Bytes.toBytes("r1")); put.add(family1, qualifier, value); htable.put(put); ResultScanner resultScanner = htable.getScanner(new Scan()); int count = 0; while (resultScanner.next() != null) { count++; } resultScanner.close(); assertEquals(1, count); MiniHBaseCluster hbaseCluster = TEST_UTIL.getMiniHBaseCluster(); List<HRegion> regions = hbaseCluster.getRegions(tableName); assertEquals(1, regions.size()); // move region to another regionserver HRegion destRegion = regions.get(0); int originServerNum = hbaseCluster.getServerWith(destRegion.getRegionName()); assertTrue("Please start more than 1 regionserver", hbaseCluster.getRegionServerThreads().size() > 1); int destServerNum = 0; while (destServerNum == originServerNum) { destServerNum++; } HRegionServer originServer = hbaseCluster.getRegionServer(originServerNum); HRegionServer destServer = hbaseCluster.getRegionServer(destServerNum); // move region to destination regionserver moveRegionAndWait(destRegion, destServer); // delete the row Delete del = new Delete(Bytes.toBytes("r1")); htable.delete(del); resultScanner = htable.getScanner(new Scan()); count = 0; while (resultScanner.next() != null) { count++; } resultScanner.close(); assertEquals(0, count); // flush region and make major compaction destServer.getOnlineRegion(destRegion.getRegionName()).flushcache(); // wait to complete major compaction for (Store store : destServer.getOnlineRegion(destRegion.getRegionName()).getStores().values()) { store.triggerMajorCompaction(); } destServer.getOnlineRegion(destRegion.getRegionName()).compactStores(); // move region to origin regionserver moveRegionAndWait(destRegion, originServer); // abort the origin regionserver originServer.abort("testing"); // see what we get Result result = htable.get(new Get(Bytes.toBytes("r1"))); if (result != null) { assertTrue("Row is deleted, but we get" + result.toString(), (result == null) || result.isEmpty()); } resultScanner.close(); } private void moveRegionAndWait(HRegion destRegion, HRegionServer destServer) throws InterruptedException, MasterNotRunningException, ZooKeeperConnectionException, IOException { HMaster master = TEST_UTIL.getMiniHBaseCluster().getMaster(); TEST_UTIL.getHBaseAdmin().move(destRegion.getRegionInfo().getEncodedNameAsBytes(), Bytes.toBytes(destServer.getServerName().getServerName())); while (true) { ServerName serverName = master.getAssignmentManager().getRegionStates() .getRegionServerOfRegion(destRegion.getRegionInfo()); if (serverName != null && serverName.equals(destServer.getServerName())) { TEST_UTIL.assertRegionOnServer(destRegion.getRegionInfo(), serverName, 200); break; } Thread.sleep(10); } } /** * Tests for hbase-2727. * @throws Exception * @see https://issues.apache.org/jira/browse/HBASE-2727 */ @Test public void test2727() throws Exception { // Test being able to have > 1 set of edits in the recovered.edits directory. // Ensure edits are replayed properly. final TableName tableName = TableName.valueOf("test2727"); HRegionInfo hri = createBasic3FamilyHRegionInfo(tableName); Path basedir = FSUtils.getTableDir(hbaseRootDir, tableName); deleteDir(basedir); HTableDescriptor htd = createBasic3FamilyHTD(tableName); HRegion region2 = HRegion.createHRegion(hri, hbaseRootDir, this.conf, htd); HRegion.closeHRegion(region2); final byte[] rowName = tableName.getName(); HLog wal1 = createWAL(this.conf); // Add 1k to each family. final int countPerFamily = 1000; final AtomicLong sequenceId = new AtomicLong(1); for (HColumnDescriptor hcd : htd.getFamilies()) { addWALEdits(tableName, hri, rowName, hcd.getName(), countPerFamily, ee, wal1, htd, sequenceId); } wal1.close(); runWALSplit(this.conf); HLog wal2 = createWAL(this.conf); // Add 1k to each family. for (HColumnDescriptor hcd : htd.getFamilies()) { addWALEdits(tableName, hri, rowName, hcd.getName(), countPerFamily, ee, wal2, htd, sequenceId); } wal2.close(); runWALSplit(this.conf); HLog wal3 = createWAL(this.conf); try { HRegion region = HRegion.openHRegion(this.conf, this.fs, hbaseRootDir, hri, htd, wal3); long seqid = region.getOpenSeqNum(); // The regions opens with sequenceId as 1. With 6k edits, its sequence number reaches 6k + 1. // When opened, this region would apply 6k edits, and increment the sequenceId by 1 assertTrue(seqid > sequenceId.get()); assertEquals(seqid - 1, sequenceId.get()); LOG.debug("region.getOpenSeqNum(): " + region.getOpenSeqNum() + ", wal3.id: " + sequenceId.get()); // TODO: Scan all. region.close(); } finally { wal3.closeAndDelete(); } } /** * Test case of HRegion that is only made out of bulk loaded files. Assert * that we don't 'crash'. * @throws IOException * @throws IllegalAccessException * @throws NoSuchFieldException * @throws IllegalArgumentException * @throws SecurityException */ @Test public void testRegionMadeOfBulkLoadedFilesOnly() throws IOException, SecurityException, IllegalArgumentException, NoSuchFieldException, IllegalAccessException, InterruptedException { final TableName tableName = TableName.valueOf("testRegionMadeOfBulkLoadedFilesOnly"); final HRegionInfo hri = createBasic3FamilyHRegionInfo(tableName); final Path basedir = new Path(this.hbaseRootDir, tableName.getNameAsString()); deleteDir(basedir); final HTableDescriptor htd = createBasic3FamilyHTD(tableName); HRegion region2 = HRegion.createHRegion(hri, hbaseRootDir, this.conf, htd); HRegion.closeHRegion(region2); HLog wal = createWAL(this.conf); HRegion region = HRegion.openHRegion(hri, htd, wal, this.conf); byte[] family = htd.getFamilies().iterator().next().getName(); Path f = new Path(basedir, "hfile"); HFileTestUtil.createHFile(this.conf, fs, f, family, family, Bytes.toBytes(""), Bytes.toBytes("z"), 10); List<Pair<byte[], String>> hfs = new ArrayList<Pair<byte[], String>>(1); hfs.add(Pair.newPair(family, f.toString())); region.bulkLoadHFiles(hfs, true); // Add an edit so something in the WAL byte[] row = tableName.getName(); region.put((new Put(row)).add(family, family, family)); wal.sync(); final int rowsInsertedCount = 11; assertEquals(rowsInsertedCount, getScannedCount(region.getScanner(new Scan()))); // Now 'crash' the region by stealing its wal final Configuration newConf = HBaseConfiguration.create(this.conf); User user = HBaseTestingUtility.getDifferentUser(newConf, tableName.getNameAsString()); user.runAs(new PrivilegedExceptionAction() { public Object run() throws Exception { runWALSplit(newConf); HLog wal2 = createWAL(newConf); HRegion region2 = HRegion.openHRegion(newConf, FileSystem.get(newConf), hbaseRootDir, hri, htd, wal2); long seqid2 = region2.getOpenSeqNum(); assertTrue(seqid2 > -1); assertEquals(rowsInsertedCount, getScannedCount(region2.getScanner(new Scan()))); // I can't close wal1. Its been appropriated when we split. region2.close(); wal2.closeAndDelete(); return null; } }); } /** * HRegion test case that is made of a major compacted HFile (created with three bulk loaded * files) and an edit in the memstore. * This is for HBASE-10958 "[dataloss] Bulk loading with seqids can prevent some log entries * from being replayed" * @throws IOException * @throws IllegalAccessException * @throws NoSuchFieldException * @throws IllegalArgumentException * @throws SecurityException */ @Test public void testCompactedBulkLoadedFiles() throws IOException, SecurityException, IllegalArgumentException, NoSuchFieldException, IllegalAccessException, InterruptedException { final TableName tableName = TableName.valueOf("testCompactedBulkLoadedFiles"); final HRegionInfo hri = createBasic3FamilyHRegionInfo(tableName); final Path basedir = new Path(this.hbaseRootDir, tableName.getNameAsString()); deleteDir(basedir); final HTableDescriptor htd = createBasic3FamilyHTD(tableName); HRegion region2 = HRegion.createHRegion(hri, hbaseRootDir, this.conf, htd); HRegion.closeHRegion(region2); HLog wal = createWAL(this.conf); HRegion region = HRegion.openHRegion(hri, htd, wal, this.conf); // Add an edit so something in the WAL byte[] row = tableName.getName(); byte[] family = htd.getFamilies().iterator().next().getName(); region.put((new Put(row)).add(family, family, family)); wal.sync(); List<Pair<byte[], String>> hfs = new ArrayList<Pair<byte[], String>>(1); for (int i = 0; i < 3; i++) { Path f = new Path(basedir, "hfile" + i); HFileTestUtil.createHFile(this.conf, fs, f, family, family, Bytes.toBytes(i + "00"), Bytes.toBytes(i + "50"), 10); hfs.add(Pair.newPair(family, f.toString())); } region.bulkLoadHFiles(hfs, true); final int rowsInsertedCount = 31; assertEquals(rowsInsertedCount, getScannedCount(region.getScanner(new Scan()))); // major compact to turn all the bulk loaded files into one normal file region.compactStores(true); assertEquals(rowsInsertedCount, getScannedCount(region.getScanner(new Scan()))); // Now 'crash' the region by stealing its wal final Configuration newConf = HBaseConfiguration.create(this.conf); User user = HBaseTestingUtility.getDifferentUser(newConf, tableName.getNameAsString()); user.runAs(new PrivilegedExceptionAction() { public Object run() throws Exception { runWALSplit(newConf); HLog wal2 = createWAL(newConf); HRegion region2 = HRegion.openHRegion(newConf, FileSystem.get(newConf), hbaseRootDir, hri, htd, wal2); long seqid2 = region2.getOpenSeqNum(); assertTrue(seqid2 > -1); assertEquals(rowsInsertedCount, getScannedCount(region2.getScanner(new Scan()))); // I can't close wal1. Its been appropriated when we split. region2.close(); wal2.closeAndDelete(); return null; } }); } /** * Test writing edits into an HRegion, closing it, splitting logs, opening * Region again. Verify seqids. * @throws IOException * @throws IllegalAccessException * @throws NoSuchFieldException * @throws IllegalArgumentException * @throws SecurityException */ @Test public void testReplayEditsWrittenViaHRegion() throws IOException, SecurityException, IllegalArgumentException, NoSuchFieldException, IllegalAccessException, InterruptedException { final TableName tableName = TableName.valueOf("testReplayEditsWrittenViaHRegion"); final HRegionInfo hri = createBasic3FamilyHRegionInfo(tableName); final Path basedir = FSUtils.getTableDir(this.hbaseRootDir, tableName); deleteDir(basedir); final byte[] rowName = tableName.getName(); final int countPerFamily = 10; final HTableDescriptor htd = createBasic3FamilyHTD(tableName); HRegion region3 = HRegion.createHRegion(hri, hbaseRootDir, this.conf, htd); HRegion.closeHRegion(region3); // Write countPerFamily edits into the three families. Do a flush on one // of the families during the load of edits so its seqid is not same as // others to test we do right thing when different seqids. HLog wal = createWAL(this.conf); HRegion region = HRegion.openHRegion(this.conf, this.fs, hbaseRootDir, hri, htd, wal); long seqid = region.getOpenSeqNum(); boolean first = true; for (HColumnDescriptor hcd : htd.getFamilies()) { addRegionEdits(rowName, hcd.getName(), countPerFamily, this.ee, region, "x"); if (first) { // If first, so we have at least one family w/ different seqid to rest. region.flushcache(); first = false; } } // Now assert edits made it in. final Get g = new Get(rowName); Result result = region.get(g); assertEquals(countPerFamily * htd.getFamilies().size(), result.size()); // Now close the region (without flush), split the log, reopen the region and assert that // replay of log has the correct effect, that our seqids are calculated correctly so // all edits in logs are seen as 'stale'/old. region.close(true); wal.close(); runWALSplit(this.conf); HLog wal2 = createWAL(this.conf); HRegion region2 = HRegion.openHRegion(conf, this.fs, hbaseRootDir, hri, htd, wal2); long seqid2 = region2.getOpenSeqNum(); assertTrue(seqid + result.size() < seqid2); final Result result1b = region2.get(g); assertEquals(result.size(), result1b.size()); // Next test. Add more edits, then 'crash' this region by stealing its wal // out from under it and assert that replay of the log adds the edits back // correctly when region is opened again. for (HColumnDescriptor hcd : htd.getFamilies()) { addRegionEdits(rowName, hcd.getName(), countPerFamily, this.ee, region2, "y"); } // Get count of edits. final Result result2 = region2.get(g); assertEquals(2 * result.size(), result2.size()); wal2.sync(); // Set down maximum recovery so we dfsclient doesn't linger retrying something // long gone. HBaseTestingUtility.setMaxRecoveryErrorCount(((FSHLog) wal2).getOutputStream(), 1); final Configuration newConf = HBaseConfiguration.create(this.conf); User user = HBaseTestingUtility.getDifferentUser(newConf, tableName.getNameAsString()); user.runAs(new PrivilegedExceptionAction() { public Object run() throws Exception { runWALSplit(newConf); FileSystem newFS = FileSystem.get(newConf); // Make a new wal for new region open. HLog wal3 = createWAL(newConf); final AtomicInteger countOfRestoredEdits = new AtomicInteger(0); HRegion region3 = new HRegion(basedir, wal3, newFS, newConf, hri, htd, null) { @Override protected boolean restoreEdit(Store s, KeyValue kv) { boolean b = super.restoreEdit(s, kv); countOfRestoredEdits.incrementAndGet(); return b; } }; long seqid3 = region3.initialize(); Result result3 = region3.get(g); // Assert that count of cells is same as before crash. assertEquals(result2.size(), result3.size()); assertEquals(htd.getFamilies().size() * countPerFamily, countOfRestoredEdits.get()); // I can't close wal1. Its been appropriated when we split. region3.close(); wal3.closeAndDelete(); return null; } }); } /** * Test that we recover correctly when there is a failure in between the * flushes. i.e. Some stores got flushed but others did not. * * Unfortunately, there is no easy hook to flush at a store level. The way * we get around this is by flushing at the region level, and then deleting * the recently flushed store file for one of the Stores. This would put us * back in the situation where all but that store got flushed and the region * died. * * We restart Region again, and verify that the edits were replayed. * * @throws IOException * @throws IllegalAccessException * @throws NoSuchFieldException * @throws IllegalArgumentException * @throws SecurityException */ @Test public void testReplayEditsAfterPartialFlush() throws IOException, SecurityException, IllegalArgumentException, NoSuchFieldException, IllegalAccessException, InterruptedException { final TableName tableName = TableName.valueOf("testReplayEditsWrittenViaHRegion"); final HRegionInfo hri = createBasic3FamilyHRegionInfo(tableName); final Path basedir = FSUtils.getTableDir(this.hbaseRootDir, tableName); deleteDir(basedir); final byte[] rowName = tableName.getName(); final int countPerFamily = 10; final HTableDescriptor htd = createBasic3FamilyHTD(tableName); HRegion region3 = HRegion.createHRegion(hri, hbaseRootDir, this.conf, htd); HRegion.closeHRegion(region3); // Write countPerFamily edits into the three families. Do a flush on one // of the families during the load of edits so its seqid is not same as // others to test we do right thing when different seqids. HLog wal = createWAL(this.conf); HRegion region = HRegion.openHRegion(this.conf, this.fs, hbaseRootDir, hri, htd, wal); long seqid = region.getOpenSeqNum(); for (HColumnDescriptor hcd : htd.getFamilies()) { addRegionEdits(rowName, hcd.getName(), countPerFamily, this.ee, region, "x"); } // Now assert edits made it in. final Get g = new Get(rowName); Result result = region.get(g); assertEquals(countPerFamily * htd.getFamilies().size(), result.size()); // Let us flush the region region.flushcache(); region.close(true); wal.close(); // delete the store files in the second column family to simulate a failure // in between the flushcache(); // we have 3 families. killing the middle one ensures that taking the maximum // will make us fail. int cf_count = 0; for (HColumnDescriptor hcd : htd.getFamilies()) { cf_count++; if (cf_count == 2) { region.getRegionFileSystem().deleteFamily(hcd.getNameAsString()); } } // Let us try to split and recover runWALSplit(this.conf); HLog wal2 = createWAL(this.conf); HRegion region2 = HRegion.openHRegion(this.conf, this.fs, hbaseRootDir, hri, htd, wal2); long seqid2 = region2.getOpenSeqNum(); assertTrue(seqid + result.size() < seqid2); final Result result1b = region2.get(g); assertEquals(result.size(), result1b.size()); } // StoreFlusher implementation used in testReplayEditsAfterAbortingFlush. // Only throws exception if throwExceptionWhenFlushing is set true. public static class CustomStoreFlusher extends DefaultStoreFlusher { // Switch between throw and not throw exception in flush static final AtomicBoolean throwExceptionWhenFlushing = new AtomicBoolean(false); public CustomStoreFlusher(Configuration conf, Store store) { super(conf, store); } @Override public List<Path> flushSnapshot(MemStoreSnapshot snapshot, long cacheFlushId, MonitoredTask status) throws IOException { if (throwExceptionWhenFlushing.get()) { throw new IOException("Simulated exception by tests"); } return super.flushSnapshot(snapshot, cacheFlushId, status); } }; /** * Test that we could recover the data correctly after aborting flush. In the * test, first we abort flush after writing some data, then writing more data * and flush again, at last verify the data. * @throws IOException */ @Test public void testReplayEditsAfterAbortingFlush() throws IOException { final TableName tableName = TableName.valueOf("testReplayEditsAfterAbortingFlush"); final HRegionInfo hri = createBasic3FamilyHRegionInfo(tableName); final Path basedir = FSUtils.getTableDir(this.hbaseRootDir, tableName); deleteDir(basedir); final HTableDescriptor htd = createBasic3FamilyHTD(tableName); HRegion region3 = HRegion.createHRegion(hri, hbaseRootDir, this.conf, htd); region3.close(); region3.getLog().closeAndDelete(); // Write countPerFamily edits into the three families. Do a flush on one // of the families during the load of edits so its seqid is not same as // others to test we do right thing when different seqids. HLog wal = createWAL(this.conf); RegionServerServices rsServices = Mockito.mock(RegionServerServices.class); Mockito.doReturn(false).when(rsServices).isAborted(); Configuration customConf = new Configuration(this.conf); customConf.set(DefaultStoreEngine.DEFAULT_STORE_FLUSHER_CLASS_KEY, CustomStoreFlusher.class.getName()); HRegion region = HRegion.openHRegion(this.hbaseRootDir, hri, htd, wal, customConf, rsServices, null); int writtenRowCount = 10; List<HColumnDescriptor> families = new ArrayList<HColumnDescriptor>(htd.getFamilies()); for (int i = 0; i < writtenRowCount; i++) { Put put = new Put(Bytes.toBytes(tableName + Integer.toString(i))); put.add(families.get(i % families.size()).getName(), Bytes.toBytes("q"), Bytes.toBytes("val")); region.put(put); } // Now assert edits made it in. RegionScanner scanner = region.getScanner(new Scan()); assertEquals(writtenRowCount, getScannedCount(scanner)); // Let us flush the region CustomStoreFlusher.throwExceptionWhenFlushing.set(true); try { region.flushcache(); fail("Injected exception hasn't been thrown"); } catch (Throwable t) { LOG.info("Expected simulated exception when flushing region," + t.getMessage()); // simulated to abort server Mockito.doReturn(true).when(rsServices).isAborted(); } // writing more data int moreRow = 10; for (int i = writtenRowCount; i < writtenRowCount + moreRow; i++) { Put put = new Put(Bytes.toBytes(tableName + Integer.toString(i))); put.add(families.get(i % families.size()).getName(), Bytes.toBytes("q"), Bytes.toBytes("val")); region.put(put); } writtenRowCount += moreRow; // call flush again CustomStoreFlusher.throwExceptionWhenFlushing.set(false); try { region.flushcache(); } catch (IOException t) { LOG.info("Expected exception when flushing region because server is stopped," + t.getMessage()); } region.close(true); wal.close(); // Let us try to split and recover runWALSplit(this.conf); HLog wal2 = createWAL(this.conf); Mockito.doReturn(false).when(rsServices).isAborted(); HRegion region2 = HRegion.openHRegion(this.hbaseRootDir, hri, htd, wal2, this.conf, rsServices, null); scanner = region2.getScanner(new Scan()); assertEquals(writtenRowCount, getScannedCount(scanner)); } private int getScannedCount(RegionScanner scanner) throws IOException { int scannedCount = 0; List<Cell> results = new ArrayList<Cell>(); while (true) { boolean existMore = scanner.next(results); if (!results.isEmpty()) scannedCount++; if (!existMore) break; results.clear(); } return scannedCount; } /** * Create an HRegion with the result of a HLog split and test we only see the * good edits * @throws Exception */ @Test public void testReplayEditsWrittenIntoWAL() throws Exception { final TableName tableName = TableName.valueOf("testReplayEditsWrittenIntoWAL"); final HRegionInfo hri = createBasic3FamilyHRegionInfo(tableName); final Path basedir = FSUtils.getTableDir(hbaseRootDir, tableName); deleteDir(basedir); final HTableDescriptor htd = createBasic3FamilyHTD(tableName); HRegion region2 = HRegion.createHRegion(hri, hbaseRootDir, this.conf, htd); HRegion.closeHRegion(region2); final HLog wal = createWAL(this.conf); final byte[] rowName = tableName.getName(); final byte[] regionName = hri.getEncodedNameAsBytes(); final AtomicLong sequenceId = new AtomicLong(1); // Add 1k to each family. final int countPerFamily = 1000; for (HColumnDescriptor hcd : htd.getFamilies()) { addWALEdits(tableName, hri, rowName, hcd.getName(), countPerFamily, ee, wal, htd, sequenceId); } // Add a cache flush, shouldn't have any effect wal.startCacheFlush(regionName); wal.completeCacheFlush(regionName); // Add an edit to another family, should be skipped. WALEdit edit = new WALEdit(); long now = ee.currentTimeMillis(); edit.add(new KeyValue(rowName, Bytes.toBytes("another family"), rowName, now, rowName)); wal.append(hri, tableName, edit, now, htd, sequenceId); // Delete the c family to verify deletes make it over. edit = new WALEdit(); now = ee.currentTimeMillis(); edit.add(new KeyValue(rowName, Bytes.toBytes("c"), null, now, KeyValue.Type.DeleteFamily)); wal.append(hri, tableName, edit, now, htd, sequenceId); // Sync. wal.sync(); // Set down maximum recovery so we dfsclient doesn't linger retrying something // long gone. HBaseTestingUtility.setMaxRecoveryErrorCount(((FSHLog) wal).getOutputStream(), 1); // Make a new conf and a new fs for the splitter to run on so we can take // over old wal. final Configuration newConf = HBaseConfiguration.create(this.conf); User user = HBaseTestingUtility.getDifferentUser(newConf, ".replay.wal.secondtime"); user.runAs(new PrivilegedExceptionAction() { public Object run() throws Exception { runWALSplit(newConf); FileSystem newFS = FileSystem.get(newConf); // 100k seems to make for about 4 flushes during HRegion#initialize. newConf.setInt(HConstants.HREGION_MEMSTORE_FLUSH_SIZE, 1024 * 100); // Make a new wal for new region. HLog newWal = createWAL(newConf); final AtomicInteger flushcount = new AtomicInteger(0); try { final HRegion region = new HRegion(basedir, newWal, newFS, newConf, hri, htd, null) { protected FlushResult internalFlushcache(final HLog wal, final long myseqid, MonitoredTask status) throws IOException { LOG.info("InternalFlushCache Invoked"); FlushResult fs = super.internalFlushcache(wal, myseqid, Mockito.mock(MonitoredTask.class)); flushcount.incrementAndGet(); return fs; }; }; long seqid = region.initialize(); // We flushed during init. assertTrue("Flushcount=" + flushcount.get(), flushcount.get() > 0); assertTrue(seqid - 1 == sequenceId.get()); Get get = new Get(rowName); Result result = region.get(get); // Make sure we only see the good edits assertEquals(countPerFamily * (htd.getFamilies().size() - 1), result.size()); region.close(); } finally { newWal.closeAndDelete(); } return null; } }); } @Test // the following test is for HBASE-6065 public void testSequentialEditLogSeqNum() throws IOException { final TableName tableName = TableName.valueOf("testSequentialEditLogSeqNum"); final HRegionInfo hri = createBasic3FamilyHRegionInfo(tableName); final Path basedir = FSUtils.getTableDir(this.hbaseRootDir, tableName); deleteDir(basedir); final byte[] rowName = tableName.getName(); final int countPerFamily = 10; final HTableDescriptor htd = createBasic1FamilyHTD(tableName); // Mock the HLog MockHLog wal = createMockWAL(this.conf); HRegion region = HRegion.openHRegion(this.conf, this.fs, hbaseRootDir, hri, htd, wal); for (HColumnDescriptor hcd : htd.getFamilies()) { addRegionEdits(rowName, hcd.getName(), countPerFamily, this.ee, region, "x"); } // Let us flush the region // But this time completeflushcache is not yet done region.flushcache(); for (HColumnDescriptor hcd : htd.getFamilies()) { addRegionEdits(rowName, hcd.getName(), 5, this.ee, region, "x"); } long lastestSeqNumber = region.getSequenceId().get(); // get the current seq no wal.doCompleteCacheFlush = true; // allow complete cache flush with the previous seq number got after first // set of edits. wal.completeCacheFlush(hri.getEncodedNameAsBytes()); wal.close(); FileStatus[] listStatus = this.fs.listStatus(wal.getDir()); HLogSplitter.splitLogFile(hbaseRootDir, listStatus[0], this.fs, this.conf, null, null, null, null); FileStatus[] listStatus1 = this.fs.listStatus(new Path(FSUtils.getTableDir(hbaseRootDir, tableName), new Path(hri.getEncodedName(), "recovered.edits"))); int editCount = 0; for (FileStatus fileStatus : listStatus1) { editCount = Integer.parseInt(fileStatus.getPath().getName()); } // The sequence number should be same assertEquals("The sequence number of the recoverd.edits and the current edit seq should be same", lastestSeqNumber, editCount); } static class MockHLog extends FSHLog { boolean doCompleteCacheFlush = false; public MockHLog(FileSystem fs, Path rootDir, String logName, Configuration conf) throws IOException { super(fs, rootDir, logName, conf); } @Override public void completeCacheFlush(byte[] encodedRegionName) { if (!doCompleteCacheFlush) { return; } super.completeCacheFlush(encodedRegionName); } } private HTableDescriptor createBasic1FamilyHTD(final TableName tableName) { HTableDescriptor htd = new HTableDescriptor(tableName); HColumnDescriptor a = new HColumnDescriptor(Bytes.toBytes("a")); htd.addFamily(a); return htd; } private MockHLog createMockWAL(Configuration conf) throws IOException { MockHLog wal = new MockHLog(FileSystem.get(conf), hbaseRootDir, logName, conf); // Set down maximum recovery so we dfsclient doesn't linger retrying something // long gone. HBaseTestingUtility.setMaxRecoveryErrorCount(((FSHLog) wal).getOutputStream(), 1); return wal; } // Flusher used in this test. Keep count of how often we are called and // actually run the flush inside here. class TestFlusher implements FlushRequester { private HRegion r; @Override public void requestFlush(HRegion region) { try { r.flushcache(); } catch (IOException e) { throw new RuntimeException("Exception flushing", e); } } @Override public void requestDelayedFlush(HRegion region, long when) { // TODO Auto-generated method stub } @Override public void registerFlushRequestListener(FlushRequestListener listener) { } @Override public boolean unregisterFlushRequestListener(FlushRequestListener listener) { return false; } @Override public void setGlobalMemstoreLimit(long globalMemStoreSize) { } } private void addWALEdits(final TableName tableName, final HRegionInfo hri, final byte[] rowName, final byte[] family, final int count, EnvironmentEdge ee, final HLog wal, final HTableDescriptor htd, final AtomicLong sequenceId) throws IOException { String familyStr = Bytes.toString(family); for (int j = 0; j < count; j++) { byte[] qualifierBytes = Bytes.toBytes(Integer.toString(j)); byte[] columnBytes = Bytes.toBytes(familyStr + ":" + Integer.toString(j)); WALEdit edit = new WALEdit(); edit.add(new KeyValue(rowName, family, qualifierBytes, ee.currentTimeMillis(), columnBytes)); wal.append(hri, tableName, edit, ee.currentTimeMillis(), htd, sequenceId); } } static List<Put> addRegionEdits(final byte[] rowName, final byte[] family, final int count, EnvironmentEdge ee, final HRegion r, final String qualifierPrefix) throws IOException { List<Put> puts = new ArrayList<Put>(); for (int j = 0; j < count; j++) { byte[] qualifier = Bytes.toBytes(qualifierPrefix + Integer.toString(j)); Put p = new Put(rowName); p.add(family, qualifier, ee.currentTimeMillis(), rowName); r.put(p); puts.add(p); } return puts; } /* * Creates an HRI around an HTD that has <code>tableName</code> and three * column families named 'a','b', and 'c'. * @param tableName Name of table to use when we create HTableDescriptor. */ private HRegionInfo createBasic3FamilyHRegionInfo(final TableName tableName) { return new HRegionInfo(tableName, null, null, false); } /* * Run the split. Verify only single split file made. * @param c * @return The single split file made * @throws IOException */ private Path runWALSplit(final Configuration c) throws IOException { List<Path> splits = HLogSplitter.split(hbaseRootDir, logDir, oldLogDir, FileSystem.get(c), c); // Split should generate only 1 file since there's only 1 region assertEquals("splits=" + splits, 1, splits.size()); // Make sure the file exists assertTrue(fs.exists(splits.get(0))); LOG.info("Split file=" + splits.get(0)); return splits.get(0); } /* * @param c * @return WAL with retries set down from 5 to 1 only. * @throws IOException */ private HLog createWAL(final Configuration c) throws IOException { HLog wal = HLogFactory.createHLog(FileSystem.get(c), hbaseRootDir, logName, c); // Set down maximum recovery so we dfsclient doesn't linger retrying something // long gone. HBaseTestingUtility.setMaxRecoveryErrorCount(((FSHLog) wal).getOutputStream(), 1); return wal; } private HTableDescriptor createBasic3FamilyHTD(final TableName tableName) { HTableDescriptor htd = new HTableDescriptor(tableName); HColumnDescriptor a = new HColumnDescriptor(Bytes.toBytes("a")); htd.addFamily(a); HColumnDescriptor b = new HColumnDescriptor(Bytes.toBytes("b")); htd.addFamily(b); HColumnDescriptor c = new HColumnDescriptor(Bytes.toBytes("c")); htd.addFamily(c); return htd; } }