| /** |
| * 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.client; |
| |
| import static org.hamcrest.CoreMatchers.instanceOf; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertArrayEquals; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import org.apache.hadoop.hbase.DoNotRetryIOException; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HBaseTestingUtility; |
| import org.apache.hadoop.hbase.TableName; |
| 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.exceptions.ScannerResetException; |
| import org.apache.hadoop.hbase.regionserver.InternalScanner; |
| import org.apache.hadoop.hbase.testclassification.ClientTests; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.junit.AfterClass; |
| import org.junit.Before; |
| import org.junit.BeforeClass; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| import org.apache.hbase.thirdparty.com.google.common.io.Closeables; |
| |
| @Category({ MediumTests.class, ClientTests.class }) |
| public class TestAsyncTableScanException { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestAsyncTableScanException.class); |
| |
| private static final HBaseTestingUtility UTIL = new HBaseTestingUtility(); |
| |
| private static TableName TABLE_NAME = TableName.valueOf("scan"); |
| |
| private static byte[] FAMILY = Bytes.toBytes("family"); |
| |
| private static byte[] QUAL = Bytes.toBytes("qual"); |
| |
| private static AsyncConnection CONN; |
| |
| private static AtomicInteger REQ_COUNT = new AtomicInteger(); |
| |
| private static volatile int ERROR_AT; |
| |
| private static volatile boolean ERROR; |
| |
| private static volatile boolean DO_NOT_RETRY; |
| |
| private static final int ROW_COUNT = 100; |
| |
| public static final class ErrorCP implements RegionObserver, RegionCoprocessor { |
| |
| @Override |
| public Optional<RegionObserver> getRegionObserver() { |
| return Optional.of(this); |
| } |
| |
| @Override |
| public boolean postScannerNext(ObserverContext<RegionCoprocessorEnvironment> c, |
| InternalScanner s, List<Result> result, int limit, boolean hasNext) throws IOException { |
| REQ_COUNT.incrementAndGet(); |
| if ((ERROR_AT == REQ_COUNT.get()) || ERROR) { |
| if (DO_NOT_RETRY) { |
| throw new DoNotRetryIOException("Injected exception"); |
| } else { |
| throw new IOException("Injected exception"); |
| } |
| } |
| return RegionObserver.super.postScannerNext(c, s, result, limit, hasNext); |
| } |
| |
| } |
| |
| @BeforeClass |
| public static void setUp() throws Exception { |
| UTIL.startMiniCluster(1); |
| UTIL.getAdmin() |
| .createTable(TableDescriptorBuilder.newBuilder(TABLE_NAME) |
| .setColumnFamily(ColumnFamilyDescriptorBuilder.of(FAMILY)) |
| .setCoprocessor(ErrorCP.class.getName()).build()); |
| try (Table table = UTIL.getConnection().getTable(TABLE_NAME)) { |
| for (int i = 0; i < ROW_COUNT; i++) { |
| table.put(new Put(Bytes.toBytes(i)).addColumn(FAMILY, QUAL, Bytes.toBytes(i))); |
| } |
| } |
| CONN = ConnectionFactory.createAsyncConnection(UTIL.getConfiguration()).get(); |
| } |
| |
| @AfterClass |
| public static void tearDown() throws Exception { |
| Closeables.close(CONN, true); |
| UTIL.shutdownMiniCluster(); |
| } |
| |
| @Before |
| public void setUpBeforeTest() { |
| REQ_COUNT.set(0); |
| ERROR_AT = 0; |
| ERROR = false; |
| DO_NOT_RETRY = false; |
| } |
| |
| @Test(expected = DoNotRetryIOException.class) |
| public void testDoNotRetryIOException() throws IOException { |
| ERROR_AT = 1; |
| DO_NOT_RETRY = true; |
| try (ResultScanner scanner = CONN.getTable(TABLE_NAME).getScanner(FAMILY)) { |
| scanner.next(); |
| } |
| } |
| |
| @Test |
| public void testIOException() throws IOException { |
| ERROR = true; |
| try (ResultScanner scanner = |
| CONN.getTableBuilder(TABLE_NAME).setMaxAttempts(3).build().getScanner(FAMILY)) { |
| scanner.next(); |
| fail(); |
| } catch (RetriesExhaustedException e) { |
| // expected |
| assertThat(e.getCause(), instanceOf(ScannerResetException.class)); |
| } |
| assertTrue(REQ_COUNT.get() >= 3); |
| } |
| |
| private void count() throws IOException { |
| try (ResultScanner scanner = CONN.getTable(TABLE_NAME).getScanner(new Scan().setCaching(1))) { |
| for (int i = 0; i < ROW_COUNT; i++) { |
| Result result = scanner.next(); |
| assertArrayEquals(Bytes.toBytes(i), result.getRow()); |
| assertArrayEquals(Bytes.toBytes(i), result.getValue(FAMILY, QUAL)); |
| } |
| } |
| } |
| |
| @Test |
| public void testRecoveryFromScannerResetWhileOpening() throws IOException { |
| ERROR_AT = 1; |
| count(); |
| // we should at least request 1 time otherwise the error will not be triggered, and then we |
| // need at least one more request to get the remaining results. |
| assertTrue(REQ_COUNT.get() >= 2); |
| } |
| |
| @Test |
| public void testRecoveryFromScannerResetInTheMiddle() throws IOException { |
| ERROR_AT = 2; |
| count(); |
| // we should at least request 2 times otherwise the error will not be triggered, and then we |
| // need at least one more request to get the remaining results. |
| assertTrue(REQ_COUNT.get() >= 3); |
| } |
| } |