/*
* Copyright (c) 2014 Spotify AB.
*
* 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 com.spotify.helios.system;
import com.spotify.helios.Parallelized;
import com.spotify.helios.ZooKeeperTestingClusterManager;
import org.apache.zookeeper.KeeperException;
import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import static java.util.concurrent.TimeUnit.MINUTES;
import static org.junit.Assert.assertArrayEquals;
@Ignore("This is an expensive test that tests the curator framework, not helios. " +
"It is disabled as it likely gives travis grief")
@RunWith(Parallelized.class)
public class ZooKeeperCuratorFailoverTest {
@Rule public ExpectedException expectedException = ExpectedException.none();
public static final byte[] FOO_DATA = "foo".getBytes();
public static final String FOO = "/foo";
private ZooKeeperTestingClusterManager zk;
@Before
public void setup() {
zk = new ZooKeeperTestingClusterManager();
}
@After
public void teardown() {
zk.close();
}
@Test
public void verifyCanCreateNodesWithOnePeerDead() throws Exception {
// Kill two peers and bring one up to ensure that only two out of three peers are alive
zk.stopPeer(0);
zk.stopPeer(1);
zk.awaitDown(5, MINUTES);
zk.startPeer(1);
zk.awaitUp(5, MINUTES);
try {
zk.curator().create().forPath(FOO, FOO_DATA);
assertArrayEquals(FOO_DATA, zk.curator().getData().forPath(FOO));
} catch (KeeperException.NodeExistsException ignore) {
}
}
@Test
public void verifyCanNotCreateNodesWithTwoPeersDead() throws Exception {
zk.stopPeer(0);
zk.stopPeer(1);
zk.awaitDown(5, MINUTES);
expectedException.expect(KeeperException.ConnectionLossException.class);
zk.curator().create().forPath(FOO, FOO_DATA);
}
@Test
public void verifyZooKeeperRecoversWithTwoPeersAlive() throws Exception {
zk.stopPeer(0);
zk.stopPeer(1);
zk.awaitDown(5, MINUTES);
zk.resetPeer(0);
zk.startPeer(0);
zk.awaitUp(5, MINUTES);
try {
zk.curator().create().forPath(FOO, FOO_DATA);
assertArrayEquals(FOO_DATA, zk.curator().getData().forPath(FOO));
} catch (KeeperException.NodeExistsException ignore) {
}
}
@Test
public void verifyZooKeeperToleratesOneNodeDataLoss() throws Exception {
try {
zk.curator().create().forPath(FOO, FOO_DATA);
assertArrayEquals(FOO_DATA, zk.curator().getData().forPath(FOO));
} catch (KeeperException.NodeExistsException ignore) {
}
zk.stopPeer(0);
zk.resetPeer(0);
zk.startPeer(0);
zk.stopPeer(1);
assertArrayEquals(FOO_DATA, zk.curator().getData().forPath(FOO));
}
}