| /** |
| * 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; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Optional; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HBaseTestingUtility; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.TableNameTestRule; |
| import org.apache.hadoop.hbase.client.Durability; |
| 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.client.Table; |
| import org.apache.hadoop.hbase.coprocessor.CoprocessorHost; |
| import org.apache.hadoop.hbase.coprocessor.ObserverContext; |
| import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor; |
| import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; |
| import org.apache.hadoop.hbase.coprocessor.RegionObserver; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.apache.hadoop.hbase.testclassification.RegionServerTests; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.ClassRule; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Category({RegionServerTests.class, MediumTests.class}) |
| public class TestScannerRetriableFailure { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestScannerRetriableFailure.class); |
| |
| private static final Logger LOG = LoggerFactory.getLogger(TestScannerRetriableFailure.class); |
| |
| private static final HBaseTestingUtility UTIL = new HBaseTestingUtility(); |
| |
| private static final String FAMILY_NAME_STR = "f"; |
| private static final byte[] FAMILY_NAME = Bytes.toBytes(FAMILY_NAME_STR); |
| |
| @Rule public TableNameTestRule testTable = new TableNameTestRule(); |
| |
| public static class FaultyScannerObserver implements RegionCoprocessor, RegionObserver { |
| private int faults = 0; |
| |
| @Override |
| public Optional<RegionObserver> getRegionObserver() { |
| return Optional.of(this); |
| } |
| |
| @Override |
| public boolean preScannerNext(final ObserverContext<RegionCoprocessorEnvironment> e, |
| final InternalScanner s, final List<Result> results, |
| final int limit, final boolean hasMore) throws IOException { |
| final TableName tableName = e.getEnvironment().getRegionInfo().getTable(); |
| if (!tableName.isSystemTable() && (faults++ % 2) == 0) { |
| LOG.debug(" Injecting fault in table=" + tableName + " scanner"); |
| throw new IOException("injected fault"); |
| } |
| return hasMore; |
| } |
| } |
| |
| private static void setupConf(Configuration conf) { |
| conf.setLong("hbase.hstore.compaction.min", 20); |
| conf.setLong("hbase.hstore.compaction.max", 39); |
| conf.setLong("hbase.hstore.blockingStoreFiles", 40); |
| |
| conf.set(CoprocessorHost.REGION_COPROCESSOR_CONF_KEY, FaultyScannerObserver.class.getName()); |
| } |
| |
| @BeforeClass |
| public static void setup() throws Exception { |
| setupConf(UTIL.getConfiguration()); |
| UTIL.startMiniCluster(1); |
| } |
| |
| @AfterClass |
| public static void tearDown() throws Exception { |
| try { |
| UTIL.shutdownMiniCluster(); |
| } catch (Exception e) { |
| LOG.warn("failure shutting down cluster", e); |
| } |
| } |
| |
| @Test |
| public void testFaultyScanner() throws Exception { |
| TableName tableName = testTable.getTableName(); |
| Table table = UTIL.createTable(tableName, FAMILY_NAME); |
| try { |
| final int NUM_ROWS = 100; |
| loadTable(table, NUM_ROWS); |
| checkTableRows(table, NUM_ROWS); |
| } finally { |
| table.close(); |
| } |
| } |
| |
| // ========================================================================== |
| // Helpers |
| // ========================================================================== |
| private FileSystem getFileSystem() { |
| return UTIL.getHBaseCluster().getMaster().getMasterFileSystem().getFileSystem(); |
| } |
| |
| private Path getRootDir() { |
| return UTIL.getHBaseCluster().getMaster().getMasterFileSystem().getRootDir(); |
| } |
| |
| public void loadTable(final Table table, int numRows) throws IOException { |
| List<Put> puts = new ArrayList<>(numRows); |
| for (int i = 0; i < numRows; ++i) { |
| byte[] row = Bytes.toBytes(String.format("%09d", i)); |
| Put put = new Put(row); |
| put.setDurability(Durability.SKIP_WAL); |
| put.addColumn(FAMILY_NAME, null, row); |
| table.put(put); |
| } |
| } |
| |
| private void checkTableRows(final Table table, int numRows) throws Exception { |
| Scan scan = new Scan(); |
| scan.setCaching(1); |
| scan.setCacheBlocks(false); |
| ResultScanner scanner = table.getScanner(scan); |
| try { |
| int count = 0; |
| for (int i = 0; i < numRows; ++i) { |
| byte[] row = Bytes.toBytes(String.format("%09d", i)); |
| Result result = scanner.next(); |
| assertTrue(result != null); |
| assertTrue(Bytes.equals(row, result.getRow())); |
| count++; |
| } |
| |
| while (true) { |
| Result result = scanner.next(); |
| if (result == null) break; |
| count++; |
| } |
| assertEquals(numRows, count); |
| } finally { |
| scanner.close(); |
| } |
| } |
| } |