/*
* Copyright 2009-2010 LinkedIn, Inc
*
* Licensed 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 voldemort.cluster.failuredetector;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static voldemort.FailureDetectorTestUtils.recordException;
import static voldemort.FailureDetectorTestUtils.recordSuccess;
import static voldemort.cluster.failuredetector.FailureDetectorUtils.create;
import static voldemort.cluster.failuredetector.MutableStoreVerifier.create;
import java.net.ConnectException;
import java.net.NoRouteToHostException;
import java.net.UnknownHostException;
import org.junit.Test;
import voldemort.MockTime;
import voldemort.cluster.Node;
import voldemort.store.UnreachableStoreException;
import voldemort.utils.Time;
import com.google.common.collect.Iterables;
public class BannagePeriodFailureDetectorTest extends AbstractFailureDetectorTest {
@Override
public FailureDetector createFailureDetector() throws Exception {
FailureDetectorConfig failureDetectorConfig = new FailureDetectorConfig().setImplementationClassName(BannagePeriodFailureDetector.class.getName())
.setBannagePeriod(BANNAGE_MILLIS)
.setCluster(cluster)
.setStoreVerifier(create(cluster.getNodes()))
.setTime(time);
return create(failureDetectorConfig, true);
}
@Override
protected Time createTime() throws Exception {
return new MockTime(0);
}
@Test
public void testCatastrophicErrors() throws Exception {
Node node = Iterables.get(cluster.getNodes(), 8);
failureDetector.recordException(node,
0,
new UnreachableStoreException("intentionalerror",
new ConnectException("intentionalerror")));
assertEquals(false, failureDetector.isAvailable(node));
time.sleep(BANNAGE_MILLIS + 1);
assertTrue(failureDetector.isAvailable(node));
failureDetector.recordException(node,
0,
new UnreachableStoreException("intentionalerror",
new UnknownHostException("intentionalerror")));
assertEquals(false, failureDetector.isAvailable(node));
time.sleep(BANNAGE_MILLIS + 1);
assertTrue(failureDetector.isAvailable(node));
failureDetector.recordException(node,
0,
new UnreachableStoreException("intentionalerror",
new NoRouteToHostException("intentionalerror")));
assertEquals(false, failureDetector.isAvailable(node));
time.sleep(BANNAGE_MILLIS + 1);
assertTrue(failureDetector.isAvailable(node));
}
@Test
public void testTimeout() throws Exception {
Node node = Iterables.get(cluster.getNodes(), 8);
recordException(failureDetector, node);
assertUnavailable(node);
time.sleep(BANNAGE_MILLIS / 2);
assertUnavailable(node);
time.sleep((BANNAGE_MILLIS / 2) + 1);
assertAvailable(node);
}
@Test
public void testTimeoutJmx() throws Exception {
Node node = Iterables.get(cluster.getNodes(), 8);
recordException(failureDetector, node);
assertUnavailable(node);
time.sleep(BANNAGE_MILLIS / 2);
assertJmxEquals("unavailableNodesBannageExpiration", node.getId() + "="
+ (BANNAGE_MILLIS / 2));
assertJmxEquals("availableNodes", "0,1,2,3,4,5,6,7");
assertJmxEquals("unavailableNodes", "8");
assertJmxEquals("availableNodeCount", 8);
assertJmxEquals("nodeCount", 9);
time.sleep((BANNAGE_MILLIS / 2) + 1);
assertAvailable(node);
assertJmxEquals("unavailableNodesBannageExpiration", "");
assertJmxEquals("availableNodes", "0,1,2,3,4,5,6,7,8");
assertJmxEquals("unavailableNodes", "");
assertJmxEquals("availableNodeCount", 9);
assertJmxEquals("nodeCount", 9);
}
@Test
public void testCumulativeFailures() throws Exception {
Node node = Iterables.get(cluster.getNodes(), 8);
recordException(failureDetector, node);
assertUnavailable(node);
time.sleep(BANNAGE_MILLIS / 2);
// OK, now record another exception
recordException(failureDetector, node);
assertUnavailable(node);
// If it's not cumulative, it would pass after sleeping the rest of the
// initial period but it's still unavailable...
time.sleep((BANNAGE_MILLIS / 2) + 1);
assertUnavailable(node);
// ...so sleep for the whole bannage period at which point it will
// become available.
time.sleep(BANNAGE_MILLIS);
assertAvailable(node);
}
@Test
public void testForceSuccess() throws Exception {
Node node = Iterables.get(cluster.getNodes(), 8);
recordException(failureDetector, node);
assertUnavailable(node);
recordSuccess(failureDetector, node, 0, false);
assertAvailable(node);
}
}