/**
* 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.hive.hcatalog.common;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.metastore.HiveMetaStore;
import org.apache.hadoop.hive.metastore.HiveMetaStoreClient;
import org.apache.hadoop.hive.metastore.api.AlreadyExistsException;
import org.apache.hadoop.hive.metastore.api.Database;
import org.apache.hadoop.hive.metastore.api.FieldSchema;
import org.apache.hadoop.hive.metastore.api.InvalidObjectException;
import org.apache.hadoop.hive.metastore.api.MetaException;
import org.apache.hadoop.hive.metastore.api.NoSuchObjectException;
import org.apache.hadoop.hive.metastore.api.SerDeInfo;
import org.apache.hadoop.hive.metastore.api.StorageDescriptor;
import org.apache.hadoop.hive.metastore.api.Table;
import org.apache.hadoop.hive.serde.serdeConstants;
import org.apache.hive.hcatalog.NoExitSecurityManager;
import org.apache.hive.hcatalog.cli.SemanticAnalysis.HCatSemanticAnalyzer;
import org.apache.thrift.TException;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import org.junit.Ignore;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.security.auth.login.LoginException;
import java.io.IOException;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
public class TestHiveClientCache {
private static final Logger LOG = LoggerFactory.getLogger(TestHiveClientCache.class);
final HiveConf hiveConf = new HiveConf();
@BeforeClass
public static void setUp() throws Exception {
}
@AfterClass
public static void tearDown() throws Exception {
}
@Test
public void testCacheHit() throws IOException, MetaException, LoginException {
HiveClientCache cache = new HiveClientCache(1000);
HiveMetaStoreClient client = cache.get(hiveConf);
assertNotNull(client);
client.close(); // close shouldn't matter
// Setting a non important configuration should return the same client only
hiveConf.setIntVar(HiveConf.ConfVars.DYNAMICPARTITIONMAXPARTS, 10);
HiveMetaStoreClient client2 = cache.get(hiveConf);
assertNotNull(client2);
assertEquals(client, client2);
client2.close();
}
@Test
public void testCacheMiss() throws IOException, MetaException, LoginException {
HiveClientCache cache = new HiveClientCache(1000);
HiveMetaStoreClient client = cache.get(hiveConf);
assertNotNull(client);
// Set different uri as it is one of the criteria deciding whether to return the same client or not
hiveConf.setVar(HiveConf.ConfVars.METASTOREURIS, " "); // URIs are checked for string equivalence, even spaces make them different
HiveMetaStoreClient client2 = cache.get(hiveConf);
assertNotNull(client2);
assertNotSame(client, client2);
}
/**
* Check that a new client is returned for the same configuration after the expiry time.
* Also verify that the expiry time configuration is honoured
*/
@Test
public void testCacheExpiry() throws IOException, MetaException, LoginException, InterruptedException {
HiveClientCache cache = new HiveClientCache(1);
HiveClientCache.CacheableHiveMetaStoreClient client = (HiveClientCache.CacheableHiveMetaStoreClient) cache.get(hiveConf);
assertNotNull(client);
Thread.sleep(2500);
HiveMetaStoreClient client2 = cache.get(hiveConf);
client.close();
assertTrue(client.isClosed()); // close() after *expiry time* and *a cache access* should have tore down the client
assertNotNull(client2);
assertNotSame(client, client2);
}
/**
* Check that a *new* client is created if asked from different threads even with
* the same hive configuration
* @throws ExecutionException
* @throws InterruptedException
*/
@Test
public void testMultipleThreadAccess() throws ExecutionException, InterruptedException {
final HiveClientCache cache = new HiveClientCache(1000);
class GetHiveClient implements Callable<HiveMetaStoreClient> {
@Override
public HiveMetaStoreClient call() throws IOException, MetaException, LoginException {
return cache.get(hiveConf);
}
}
ExecutorService executor = Executors.newFixedThreadPool(2);
Callable<HiveMetaStoreClient> worker1 = new GetHiveClient();
Callable<HiveMetaStoreClient> worker2 = new GetHiveClient();
Future<HiveMetaStoreClient> clientFuture1 = executor.submit(worker1);
Future<HiveMetaStoreClient> clientFuture2 = executor.submit(worker2);
HiveMetaStoreClient client1 = clientFuture1.get();
HiveMetaStoreClient client2 = clientFuture2.get();
assertNotNull(client1);
assertNotNull(client2);
assertNotSame(client1, client2);
}
@Test
public void testCloseAllClients() throws IOException, MetaException, LoginException {
final HiveClientCache cache = new HiveClientCache(1000);
HiveClientCache.CacheableHiveMetaStoreClient client1 = (HiveClientCache.CacheableHiveMetaStoreClient) cache.get(hiveConf);
hiveConf.setVar(HiveConf.ConfVars.METASTOREURIS, " "); // URIs are checked for string equivalence, even spaces make them different
HiveClientCache.CacheableHiveMetaStoreClient client2 = (HiveClientCache.CacheableHiveMetaStoreClient) cache.get(hiveConf);
cache.closeAllClientsQuietly();
assertTrue(client1.isClosed());
assertTrue(client2.isClosed());
}
/**
* Test that a long table name actually breaks the HMSC. Subsequently check that isOpen() reflects
* and tells if the client is broken
*/
@Ignore("hangs indefinitely")
@Test
public void testHMSCBreakability() throws IOException, MetaException, LoginException, TException, AlreadyExistsException,
InvalidObjectException, NoSuchObjectException, InterruptedException {
// Setup
LocalMetaServer metaServer = new LocalMetaServer();
metaServer.start();
final HiveClientCache cache = new HiveClientCache(1000);
HiveClientCache.CacheableHiveMetaStoreClient client =
(HiveClientCache.CacheableHiveMetaStoreClient) cache.get(metaServer.getHiveConf());
assertTrue(client.isOpen());
final String DB_NAME = "test_db";
final String LONG_TABLE_NAME = "long_table_name_" + new BigInteger(200, new Random()).toString(2);
try {
client.dropTable(DB_NAME, LONG_TABLE_NAME);
} catch (Exception e) {
}
try {
client.dropDatabase(DB_NAME);
} catch (Exception e) {
}
client.createDatabase(new Database(DB_NAME, "", null, null));
List<FieldSchema> fields = new ArrayList<FieldSchema>();
fields.add(new FieldSchema("colname", serdeConstants.STRING_TYPE_NAME, ""));
Table tbl = new Table();
tbl.setDbName(DB_NAME);
tbl.setTableName(LONG_TABLE_NAME);
StorageDescriptor sd = new StorageDescriptor();
sd.setCols(fields);
tbl.setSd(sd);
sd.setSerdeInfo(new SerDeInfo());
// Break the client
try {
client.createTable(tbl);
fail("Exception was expected while creating table with long name");
} catch (Exception e) {
}
assertFalse(client.isOpen());
metaServer.shutDown();
}
private static class LocalMetaServer implements Runnable {
public final int MS_PORT = 20101;
private final HiveConf hiveConf;
private final SecurityManager securityManager;
public final static int WAIT_TIME_FOR_BOOTUP = 30000;
public LocalMetaServer() {
securityManager = System.getSecurityManager();
System.setSecurityManager(new NoExitSecurityManager());
hiveConf = new HiveConf(TestHiveClientCache.class);
hiveConf.setVar(HiveConf.ConfVars.METASTOREURIS, "thrift://localhost:"
+ MS_PORT);
hiveConf.setIntVar(HiveConf.ConfVars.METASTORETHRIFTCONNECTIONRETRIES, 3);
hiveConf.setIntVar(HiveConf.ConfVars.METASTORETHRIFTFAILURERETRIES, 3);
hiveConf.set(HiveConf.ConfVars.SEMANTIC_ANALYZER_HOOK.varname,
HCatSemanticAnalyzer.class.getName());
hiveConf.set(HiveConf.ConfVars.PREEXECHOOKS.varname, "");
hiveConf.set(HiveConf.ConfVars.POSTEXECHOOKS.varname, "");
hiveConf.set(HiveConf.ConfVars.HIVE_SUPPORT_CONCURRENCY.varname,
"false");
System.setProperty(HiveConf.ConfVars.PREEXECHOOKS.varname, " ");
System.setProperty(HiveConf.ConfVars.POSTEXECHOOKS.varname, " ");
}
public void start() throws InterruptedException {
Thread thread = new Thread(this);
thread.start();
Thread.sleep(WAIT_TIME_FOR_BOOTUP); // Wait for the server to bootup
}
@Override
public void run() {
try {
HiveMetaStore.main(new String[]{"-v", "-p", String.valueOf(MS_PORT)});
} catch (Throwable t) {
LOG.error("Exiting. Got exception from metastore: ", t);
}
}
public HiveConf getHiveConf() {
return hiveConf;
}
public void shutDown() {
System.setSecurityManager(securityManager);
}
}
}