| /* |
| * 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.accumulo.test; |
| |
| import static org.apache.accumulo.fate.util.UtilWaitThread.sleepUninterruptibly; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.security.SecureRandom; |
| import java.util.Iterator; |
| import java.util.Map.Entry; |
| import java.util.Random; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import org.apache.accumulo.core.client.Accumulo; |
| import org.apache.accumulo.core.client.AccumuloClient; |
| import org.apache.accumulo.core.client.BatchWriter; |
| import org.apache.accumulo.core.client.IteratorSetting; |
| import org.apache.accumulo.core.client.Scanner; |
| import org.apache.accumulo.core.conf.Property; |
| import org.apache.accumulo.core.data.Key; |
| import org.apache.accumulo.core.data.Mutation; |
| import org.apache.accumulo.core.data.Value; |
| import org.apache.accumulo.core.metadata.MetadataTable; |
| import org.apache.accumulo.core.security.Authorizations; |
| import org.apache.accumulo.miniclusterImpl.MiniAccumuloConfigImpl; |
| import org.apache.accumulo.test.functional.ConfigurableMacBase; |
| import org.apache.accumulo.test.functional.SlowIterator; |
| import org.apache.hadoop.conf.Configuration; |
| |
| import com.google.common.collect.Iterators; |
| |
| public class MetaGetsReadersIT extends ConfigurableMacBase { |
| |
| @Override |
| public void configure(MiniAccumuloConfigImpl cfg, Configuration hadoopCoreSite) { |
| cfg.setNumTservers(1); |
| cfg.setProperty(Property.TSERV_SCAN_MAX_OPENFILES, "2"); |
| cfg.setProperty(Property.TABLE_BLOCKCACHE_ENABLED, "false"); |
| } |
| |
| @Override |
| protected int defaultTimeoutSeconds() { |
| return 2 * 60; |
| } |
| |
| private static Thread slowScan(final AccumuloClient c, final String tableName, |
| final AtomicBoolean stop) { |
| return new Thread(() -> { |
| try { |
| while (!stop.get()) { |
| try (Scanner s = c.createScanner(tableName, Authorizations.EMPTY)) { |
| IteratorSetting is = new IteratorSetting(50, SlowIterator.class); |
| SlowIterator.setSleepTime(is, 10); |
| s.addScanIterator(is); |
| Iterator<Entry<Key,Value>> iterator = s.iterator(); |
| while (iterator.hasNext() && !stop.get()) { |
| iterator.next(); |
| } |
| } |
| } |
| } catch (Exception ex) { |
| log.trace("{}", ex.getMessage(), ex); |
| stop.set(true); |
| } |
| }); |
| } |
| |
| public void test() throws Exception { |
| final String tableName = getUniqueNames(1)[0]; |
| try (AccumuloClient c = Accumulo.newClient().from(getClientProperties()).build()) { |
| c.tableOperations().create(tableName); |
| Random random = new SecureRandom(); |
| try (BatchWriter bw = c.createBatchWriter(tableName)) { |
| for (int i = 0; i < 50000; i++) { |
| byte[] row = new byte[100]; |
| random.nextBytes(row); |
| Mutation m = new Mutation(row); |
| m.put("", "", ""); |
| bw.addMutation(m); |
| } |
| } |
| c.tableOperations().flush(tableName, null, null, true); |
| final AtomicBoolean stop = new AtomicBoolean(false); |
| Thread t1 = slowScan(c, tableName, stop); |
| t1.start(); |
| Thread t2 = slowScan(c, tableName, stop); |
| t2.start(); |
| sleepUninterruptibly(500, TimeUnit.MILLISECONDS); |
| long now = System.currentTimeMillis(); |
| |
| try (Scanner s = c.createScanner(MetadataTable.NAME, Authorizations.EMPTY)) { |
| Iterators.size(s.iterator()); |
| } |
| |
| long delay = System.currentTimeMillis() - now; |
| System.out.println("Delay = " + delay); |
| assertTrue("metadata table scan was slow", delay < 1000); |
| assertFalse(stop.get()); |
| stop.set(true); |
| t1.interrupt(); |
| t2.interrupt(); |
| t1.join(); |
| t2.join(); |
| } |
| } |
| |
| } |