/**
* 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 static org.junit.Assert.*;
import java.util.Arrays;
import org.apache.log4j.Logger;
import org.apache.zookeeper.server.quorum.QuorumPeer;
import org.apache.zookeeper.server.quorum.QuorumStats;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class ObserverLETest {
private static final Logger LOG = Logger.getLogger(ObserverLETest.class);
final QuorumBase qb = new QuorumBase();
final ClientTest ct = new ClientTest();
@Before
public void establishThreeParticipantOneObserverEnsemble() throws Exception {
qb.setUp(true);
ct.hostPort = qb.hostPort;
ct.setUpAll();
qb.s5.shutdown();
}
@After
public void shutdownQuorum() throws Exception {
ct.tearDownAll();
qb.tearDown();
}
/**
* See ZOOKEEPER-1294. Confirms that an observer will not support the quorum
* of a leader by forming a 5-node, 2-observer ensemble (so quorum size is 2).
* When all but the leader and one observer are shut down, the leader should
* enter the 'looking' state, not stay in the 'leading' state.
*/
@Test
public void testLEWithObserver() throws Exception {
QuorumPeer leader = null;
for (QuorumPeer server : Arrays.asList(qb.s1, qb.s2, qb.s3)) {
if (server.getServerState().equals(
QuorumStats.Provider.FOLLOWING_STATE)) {
server.shutdown();
assertTrue("Waiting for server down", ClientBase
.waitForServerDown("127.0.0.1:"
+ server.getClientPort(),
ClientBase.CONNECTION_TIMEOUT));
} else {
assertNull("More than one leader found", leader);
leader = server;
}
}
assertTrue("Leader is not in Looking state", ClientBase
.waitForServerState(leader, ClientBase.CONNECTION_TIMEOUT,
QuorumStats.Provider.LOOKING_STATE));
}
}