/**
* 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.zookeeper.test;
import java.io.File;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZKTestCase;
import org.apache.zookeeper.ZooDefs;
import org.apache.zookeeper.ZooKeeper;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class QuorumZxidSyncTest extends ZKTestCase {
QuorumBase qb = new QuorumBase();
@Before
public void setUp() throws Exception {
qb.setUp();
}
/**
* find out what happens when a follower connects to leader that is behind
*/
@Test
public void testBehindLeader() throws Exception {
// crank up the epoch numbers
ClientBase.waitForServerUp(qb.hostPort, 10000);
ClientBase.waitForServerUp(qb.hostPort, 10000);
ZooKeeper zk = new ZooKeeper(qb.hostPort, 10000, new Watcher() {
public void process(WatchedEvent event) {
}});
zk.create("/0", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
zk.close();
qb.shutdownServers();
qb.startServers();
ClientBase.waitForServerUp(qb.hostPort, 10000);
qb.shutdownServers();
qb.startServers();
ClientBase.waitForServerUp(qb.hostPort, 10000);
zk = new ZooKeeper(qb.hostPort, 10000, new Watcher() {
public void process(WatchedEvent event) {
}});
zk.create("/1", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
zk.close();
qb.shutdownServers();
qb.startServers();
ClientBase.waitForServerUp(qb.hostPort, 10000);
qb.shutdownServers();
qb.startServers();
ClientBase.waitForServerUp(qb.hostPort, 10000);
zk = new ZooKeeper(qb.hostPort, 10000, new Watcher() {
public void process(WatchedEvent event) {
}});
zk.create("/2", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
zk.close();
qb.shutdownServers();
deleteFiles(qb.s1dir);
deleteFiles(qb.s2dir);
deleteFiles(qb.s3dir);
deleteFiles(qb.s4dir);
qb.setupServers();
qb.s1.start();
qb.s2.start();
qb.s3.start();
qb.s4.start();
Assert.assertTrue("Servers didn't come up", ClientBase.waitForServerUp(qb.hostPort, 10000));
qb.s5.start();
String hostPort = "127.0.0.1:" + qb.s5.getClientPort();
Assert.assertFalse("Servers came up, but shouldn't have since it's ahead of leader",
ClientBase.waitForServerUp(hostPort, 10000));
}
private void deleteFiles(File f) {
File v = new File(f, "version-2");
for(File c: v.listFiles()) {
c.delete();
}
}
/**
* find out what happens when the latest state is in the snapshots not
* the logs.
*/
@Test
public void testLateLogs() throws Exception {
// crank up the epoch numbers
ClientBase.waitForServerUp(qb.hostPort, 10000);
ClientBase.waitForServerUp(qb.hostPort, 10000);
ZooKeeper zk = new ZooKeeper(qb.hostPort, 10000, new Watcher() {
public void process(WatchedEvent event) {
}});
zk.create("/0", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
zk.close();
qb.shutdownServers();
qb.startServers();
ClientBase.waitForServerUp(qb.hostPort, 10000);
qb.shutdownServers();
qb.startServers();
ClientBase.waitForServerUp(qb.hostPort, 10000);
zk = new ZooKeeper(qb.hostPort, 10000, new Watcher() {
public void process(WatchedEvent event) {
}});
zk.create("/1", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
zk.close();
qb.shutdownServers();
qb.startServers();
ClientBase.waitForServerUp(qb.hostPort, 10000);
qb.shutdownServers();
deleteLogs(qb.s1dir);
deleteLogs(qb.s2dir);
deleteLogs(qb.s3dir);
deleteLogs(qb.s4dir);
deleteLogs(qb.s5dir);
qb.startServers();
ClientBase.waitForServerUp(qb.hostPort, 10000);
zk = new ZooKeeper(qb.hostPort, 10000, new Watcher() {
public void process(WatchedEvent event) {
}});
zk.create("/2", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
zk.close();
qb.shutdownServers();
qb.startServers();
ClientBase.waitForServerUp(qb.hostPort, 10000);
zk = new ZooKeeper(qb.hostPort, 10000, new Watcher() {
public void process(WatchedEvent event) {
}});
boolean saw2 = false;
for(String child: zk.getChildren("/", false)) {
if (child.equals("2")) {
saw2 = true;
}
}
zk.close();
Assert.assertTrue("Didn't see /2 (went back in time)", saw2);
}
private void deleteLogs(File f) {
File v = new File(f, "version-2");
for(File c: v.listFiles()) {
if (c.getName().startsWith("log")) {
c.delete();
}
}
}
@After
public void tearDown() throws Exception {
qb.tearDown();
}
}