| /** |
| * 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.hadoop.hdfs.server.namenode; |
| |
| import com.google.common.base.Supplier; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.commons.logging.impl.Log4JLogger; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.metrics2.util.MBeans; |
| import org.apache.hadoop.test.GenericTestUtils; |
| import org.apache.log4j.Appender; |
| import org.apache.log4j.AppenderSkeleton; |
| import org.apache.log4j.AsyncAppender; |
| import org.apache.log4j.spi.LoggingEvent; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.Timeout; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.TimeoutException; |
| import java.util.regex.Pattern; |
| |
| import static org.apache.hadoop.hdfs.DFSConfigKeys.*; |
| import static org.junit.Assert.*; |
| import static org.mockito.Mockito.mock; |
| |
| /** |
| * Test periodic logging of NameNode metrics. |
| */ |
| public class TestNameNodeMetricsLogger { |
| static final Log LOG = LogFactory.getLog(TestNameNodeMetricsLogger.class); |
| |
| @Rule |
| public Timeout timeout = new Timeout(300000); |
| |
| @Test |
| public void testMetricsLoggerOnByDefault() throws IOException { |
| NameNode nn = makeNameNode(true); |
| assertNotNull(nn.metricsLoggerTimer); |
| } |
| |
| @Test |
| public void testDisableMetricsLogger() throws IOException { |
| NameNode nn = makeNameNode(false); |
| assertNull(nn.metricsLoggerTimer); |
| } |
| |
| @Test |
| public void testMetricsLoggerIsAsync() throws IOException { |
| makeNameNode(true); |
| org.apache.log4j.Logger logger = |
| ((Log4JLogger) NameNode.MetricsLog).getLogger(); |
| @SuppressWarnings("unchecked") |
| List<Appender> appenders = Collections.list(logger.getAllAppenders()); |
| assertTrue(appenders.get(0) instanceof AsyncAppender); |
| } |
| |
| /** |
| * Publish a fake metric under the "Hadoop:" domain and ensure it is |
| * logged by the metrics logger. |
| */ |
| @Test |
| public void testMetricsLogOutput() |
| throws IOException, InterruptedException, TimeoutException { |
| TestFakeMetric metricsProvider = new TestFakeMetric(); |
| MBeans.register(this.getClass().getSimpleName(), |
| "DummyMetrics", metricsProvider); |
| makeNameNode(true); // Log metrics early and often. |
| final PatternMatchingAppender appender = |
| new PatternMatchingAppender("^.*FakeMetric42.*$"); |
| addAppender(NameNode.MetricsLog, appender); |
| |
| // Ensure that the supplied pattern was matched. |
| GenericTestUtils.waitFor(new Supplier<Boolean>() { |
| @Override |
| public Boolean get() { |
| return appender.isMatched(); |
| } |
| }, 1000, 60000); |
| } |
| |
| /** |
| * Create a NameNode object that listens on a randomly chosen port |
| * number. |
| * |
| * @param enableMetricsLogging true if periodic metrics logging is to be |
| * enabled, false otherwise. |
| */ |
| private NameNode makeNameNode(boolean enableMetricsLogging) |
| throws IOException { |
| Configuration conf = new HdfsConfiguration(); |
| conf.set(FS_DEFAULT_NAME_KEY, "hdfs://localhost:0"); |
| conf.set(DFS_NAMENODE_HTTP_ADDRESS_KEY, "0.0.0.0:0"); |
| conf.setInt(DFS_NAMENODE_METRICS_LOGGER_PERIOD_SECONDS_KEY, |
| enableMetricsLogging ? 1 : 0); // If enabled, log early and log often |
| return new TestNameNode(conf); |
| } |
| |
| private void addAppender(Log log, Appender appender) { |
| org.apache.log4j.Logger logger = ((Log4JLogger) log).getLogger(); |
| @SuppressWarnings("unchecked") |
| List<Appender> appenders = Collections.list(logger.getAllAppenders()); |
| ((AsyncAppender) appenders.get(0)).addAppender(appender); |
| } |
| |
| /** |
| * A NameNode that stubs out the NameSystem for testing. |
| */ |
| private static class TestNameNode extends NameNode { |
| @Override |
| protected void loadNamesystem(Configuration conf) throws IOException { |
| this.namesystem = mock(FSNamesystem.class); |
| } |
| |
| public TestNameNode(Configuration conf) throws IOException { |
| super(conf); |
| } |
| } |
| |
| public interface TestFakeMetricMXBean { |
| int getFakeMetric42(); |
| } |
| |
| /** |
| * MBean for testing |
| */ |
| public static class TestFakeMetric implements TestFakeMetricMXBean { |
| @Override |
| public int getFakeMetric42() { |
| return 0; |
| } |
| } |
| |
| /** |
| * An appender that matches logged messages against the given |
| * regular expression. |
| */ |
| public static class PatternMatchingAppender extends AppenderSkeleton { |
| private final Pattern pattern; |
| private volatile boolean matched; |
| |
| public PatternMatchingAppender(String pattern) { |
| this.pattern = Pattern.compile(pattern); |
| this.matched = false; |
| } |
| |
| public boolean isMatched() { |
| return matched; |
| } |
| |
| @Override |
| protected void append(LoggingEvent event) { |
| if (pattern.matcher(event.getMessage().toString()).matches()) { |
| matched = true; |
| } |
| } |
| |
| @Override |
| public void close() { |
| } |
| |
| @Override |
| public boolean requiresLayout() { |
| return false; |
| } |
| } |
| } |