org.apache.hadoop.hdfs.tools.TestDFSAdmin.java Source code

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/**
 * 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.tools;

import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY;

import com.google.common.base.Supplier;
import com.google.common.collect.Lists;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.ReconfigurationUtil;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.common.Storage;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.datanode.StorageLocation;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.test.GenericTestUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.concurrent.TimeoutException;

import static org.hamcrest.CoreMatchers.allOf;
import static org.hamcrest.CoreMatchers.anyOf;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.not;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.hamcrest.CoreMatchers.containsString;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class TestDFSAdmin {
    private static final Log LOG = LogFactory.getLog(DFSAdmin.class);
    private Configuration conf = null;
    private MiniDFSCluster cluster;
    private DFSAdmin admin;
    private DataNode datanode;
    private NameNode namenode;

    @Before
    public void setUp() throws Exception {
        conf = new Configuration();
        restartCluster();

        admin = new DFSAdmin();
    }

    @After
    public void tearDown() throws Exception {
        if (cluster != null) {
            cluster.shutdown();
            cluster = null;
        }
    }

    private void restartCluster() throws IOException {
        if (cluster != null) {
            cluster.shutdown();
        }
        cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
        cluster.waitActive();
        datanode = cluster.getDataNodes().get(0);
        namenode = cluster.getNameNode();
    }

    private void getReconfigurableProperties(String nodeType, String address, final List<String> outs,
            final List<String> errs) throws IOException {
        reconfigurationOutErrFormatter("getReconfigurableProperties", nodeType, address, outs, errs);
    }

    private void getReconfigurationStatus(String nodeType, String address, final List<String> outs,
            final List<String> errs) throws IOException {
        reconfigurationOutErrFormatter("getReconfigurationStatus", nodeType, address, outs, errs);
    }

    private void reconfigurationOutErrFormatter(String methodName, String nodeType, String address,
            final List<String> outs, final List<String> errs) throws IOException {
        ByteArrayOutputStream bufOut = new ByteArrayOutputStream();
        PrintStream out = new PrintStream(bufOut);
        ByteArrayOutputStream bufErr = new ByteArrayOutputStream();
        PrintStream err = new PrintStream(bufErr);

        if (methodName.equals("getReconfigurableProperties")) {
            admin.getReconfigurableProperties(nodeType, address, out, err);
        } else if (methodName.equals("getReconfigurationStatus")) {
            admin.getReconfigurationStatus(nodeType, address, out, err);
        } else if (methodName.equals("startReconfiguration")) {
            admin.startReconfiguration(nodeType, address, out, err);
        }

        Scanner scanner = new Scanner(bufOut.toString());
        while (scanner.hasNextLine()) {
            outs.add(scanner.nextLine());
        }
        scanner.close();
        scanner = new Scanner(bufErr.toString());
        while (scanner.hasNextLine()) {
            errs.add(scanner.nextLine());
        }
        scanner.close();
    }

    @Test(timeout = 30000)
    public void testDataNodeGetReconfigurableProperties() throws IOException {
        final int port = datanode.getIpcPort();
        final String address = "localhost:" + port;
        final List<String> outs = Lists.newArrayList();
        final List<String> errs = Lists.newArrayList();
        getReconfigurableProperties("datanode", address, outs, errs);
        assertEquals(3, outs.size());
        assertEquals(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY, outs.get(1));
    }

    /**
     * Test reconfiguration and check the status outputs.
     * @param expectedSuccuss set true if the reconfiguration task should success.
     * @throws IOException
     * @throws InterruptedException
     * @throws TimeoutException
     */
    private void testDataNodeGetReconfigurationStatus(boolean expectedSuccuss)
            throws IOException, InterruptedException, TimeoutException {
        ReconfigurationUtil ru = mock(ReconfigurationUtil.class);
        datanode.setReconfigurationUtil(ru);

        List<ReconfigurationUtil.PropertyChange> changes = new ArrayList<>();
        File newDir = new File(cluster.getDataDirectory(), "data_new");
        if (expectedSuccuss) {
            newDir.mkdirs();
        } else {
            // Inject failure.
            newDir.createNewFile();
        }
        changes.add(new ReconfigurationUtil.PropertyChange(DFS_DATANODE_DATA_DIR_KEY, newDir.toString(),
                datanode.getConf().get(DFS_DATANODE_DATA_DIR_KEY)));
        changes.add(new ReconfigurationUtil.PropertyChange("randomKey", "new123", "old456"));
        when(ru.parseChangedProperties(any(Configuration.class), any(Configuration.class))).thenReturn(changes);

        final int port = datanode.getIpcPort();
        final String address = "localhost:" + port;

        assertThat(admin.startReconfiguration("datanode", address), is(0));

        final List<String> outs = Lists.newArrayList();
        final List<String> errs = Lists.newArrayList();
        awaitReconfigurationFinished("datanode", address, outs, errs);

        if (expectedSuccuss) {
            assertThat(outs.size(), is(4));
        } else {
            assertThat(outs.size(), is(6));
        }

        List<StorageLocation> locations = DataNode.getStorageLocations(datanode.getConf());
        if (expectedSuccuss) {
            assertThat(locations.size(), is(1));
            assertThat(locations.get(0).getFile(), is(newDir));
            // Verify the directory is appropriately formatted.
            assertTrue(new File(newDir, Storage.STORAGE_DIR_CURRENT).isDirectory());
        } else {
            assertTrue(locations.isEmpty());
        }

        int offset = 1;
        if (expectedSuccuss) {
            assertThat(outs.get(offset), containsString("SUCCESS: Changed property " + DFS_DATANODE_DATA_DIR_KEY));
        } else {
            assertThat(outs.get(offset), containsString("FAILED: Change property " + DFS_DATANODE_DATA_DIR_KEY));
        }
        assertThat(outs.get(offset + 1),
                is(allOf(containsString("From:"), containsString("data1"), containsString("data2"))));
        assertThat(outs.get(offset + 2), is(not(anyOf(containsString("data1"), containsString("data2")))));
        assertThat(outs.get(offset + 2), is(allOf(containsString("To"), containsString("data_new"))));
    }

    @Test(timeout = 30000)
    public void testDataNodeGetReconfigurationStatus() throws IOException, InterruptedException, TimeoutException {
        testDataNodeGetReconfigurationStatus(true);
        restartCluster();
        testDataNodeGetReconfigurationStatus(false);
    }

    @Test(timeout = 30000)
    public void testNameNodeGetReconfigurableProperties() throws IOException {
        final String address = namenode.getHostAndPort();
        final List<String> outs = Lists.newArrayList();
        final List<String> errs = Lists.newArrayList();
        getReconfigurableProperties("namenode", address, outs, errs);
        assertEquals(6, outs.size());
        assertEquals(DFS_HEARTBEAT_INTERVAL_KEY, outs.get(1));
        assertEquals(DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY, outs.get(2));
        assertEquals(errs.size(), 0);
    }

    void awaitReconfigurationFinished(final String nodeType, final String address, final List<String> outs,
            final List<String> errs) throws TimeoutException, IOException, InterruptedException {
        GenericTestUtils.waitFor(new Supplier<Boolean>() {
            @Override
            public Boolean get() {
                outs.clear();
                errs.clear();
                try {
                    getReconfigurationStatus(nodeType, address, outs, errs);
                } catch (IOException e) {
                    LOG.error(String.format("call getReconfigurationStatus on %s[%s] failed.", nodeType, address),
                            e);
                }
                return !outs.isEmpty() && outs.get(0).contains("finished");

            }
        }, 100, 100 * 100);
    }

    @Test(timeout = 30000)
    public void testNameNodeGetReconfigurationStatus() throws IOException, InterruptedException, TimeoutException {
        ReconfigurationUtil ru = mock(ReconfigurationUtil.class);
        namenode.setReconfigurationUtil(ru);
        final String address = namenode.getHostAndPort();

        List<ReconfigurationUtil.PropertyChange> changes = new ArrayList<>();
        changes.add(new ReconfigurationUtil.PropertyChange(DFS_HEARTBEAT_INTERVAL_KEY, String.valueOf(6),
                namenode.getConf().get(DFS_HEARTBEAT_INTERVAL_KEY)));
        changes.add(new ReconfigurationUtil.PropertyChange("randomKey", "new123", "old456"));
        when(ru.parseChangedProperties(any(Configuration.class), any(Configuration.class))).thenReturn(changes);
        assertThat(admin.startReconfiguration("namenode", address), is(0));

        final List<String> outs = Lists.newArrayList();
        final List<String> errs = Lists.newArrayList();
        awaitReconfigurationFinished("namenode", address, outs, errs);

        // verify change
        assertEquals(DFS_HEARTBEAT_INTERVAL_KEY + " has wrong value", 6,
                namenode.getConf().getLong(DFS_HEARTBEAT_INTERVAL_KEY, DFS_HEARTBEAT_INTERVAL_DEFAULT));
        assertEquals(DFS_HEARTBEAT_INTERVAL_KEY + " has wrong value", 6,
                namenode.getNamesystem().getBlockManager().getDatanodeManager().getHeartbeatInterval());

        int offset = 1;
        assertThat(outs.get(offset), containsString("SUCCESS: Changed property " + DFS_HEARTBEAT_INTERVAL_KEY));
        assertThat(outs.get(offset + 1), is(allOf(containsString("From:"), containsString("3"))));
        assertThat(outs.get(offset + 2), is(allOf(containsString("To:"), containsString("6"))));
    }
}