org.apache.hadoop.hdfs.TestHttpServerShutdown.java Source code

Introduction

Here is the source code for org.apache.hadoop.hdfs.TestHttpServerShutdown.java

Source

/**
 * 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.hadoop.hdfs;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.Map;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.tools.DFSck;
import org.apache.hadoop.hdfs.util.InjectionEvent;
import org.apache.hadoop.http.HttpServer;
import org.apache.hadoop.util.InjectionEventI;
import org.apache.hadoop.util.InjectionHandler;

import static org.junit.Assert.*;
import org.junit.Test;

public class TestHttpServerShutdown {

    private static MiniDFSCluster cluster;
    private static Configuration conf;
    private static final Log LOG = LogFactory.getLog(TestHttpServerShutdown.class);
    private static Set<Thread> oldThreads;
    private volatile boolean fsckCalled = false;

    private class TestHandler extends InjectionHandler {
        @Override
        protected void _processEvent(InjectionEventI event, Object... args) {
            if (event == InjectionEvent.NAMENODE_FSCK_START) {
                fsckCalled = true;
                while (true) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException ie) {
                    }
                }
            }
        }
    }

    private class FsckThread extends Thread {

        public void run() {
            try {
                ByteArrayOutputStream os = new ByteArrayOutputStream();
                PrintStream ps = new PrintStream(os);
                new DFSck(conf, ps).run(new String[] { "/" });
            } catch (Exception e) {
            }
        }
    }

    @Test(timeout = 180000)
    public void testShutdown() throws Exception {
        oldThreads = Thread.getAllStackTraces().keySet();
        conf = new Configuration();
        conf.setInt(HttpServer.HTTP_THREADPOOL_MAX_STOP_TIME, 3000);
        cluster = new MiniDFSCluster(conf, 0, true, null);

        InjectionHandler.set(new TestHandler());
        Thread fsck = new FsckThread();
        fsck.setDaemon(true);
        fsck.start();

        while (!fsckCalled) {
            Thread.sleep(1000);
            LOG.info("Waiting for fsck to hit NN");
        }
        cluster.shutdown();

        LOG.info("Alive Non Daemon threads : ");
        for (Map.Entry<Thread, StackTraceElement[]> entry : Thread.getAllStackTraces().entrySet()) {
            Thread t = entry.getKey();
            if (!t.isDaemon() && !oldThreads.contains(t)) {
                LOG.info("Thread : " + t.getName());
                for (StackTraceElement e : entry.getValue()) {
                    LOG.info(e);
                }
                fail("Thread : " + t.getName() + " is not a daemon thread");
            }
        }
    }
}