org.apache.flink.runtime.blob.BlobRecoveryITCase.java Source code

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Here is the source code for org.apache.flink.runtime.blob.BlobRecoveryITCase.java

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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.flink.runtime.blob;

import org.apache.commons.io.FileUtils;
import org.apache.flink.api.common.JobID;
import org.apache.flink.configuration.ConfigConstants;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.configuration.HighAvailabilityOptions;
import org.apache.flink.runtime.jobmanager.HighAvailabilityMode;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.File;
import java.io.InputStream;
import java.net.InetSocketAddress;
import java.util.Arrays;
import java.util.Random;

import static org.junit.Assert.assertEquals;

public class BlobRecoveryITCase {

    private File recoveryDir;

    @Before
    public void setUp() throws Exception {
        recoveryDir = new File(FileUtils.getTempDirectory(), "BlobRecoveryITCaseDir");
        if (!recoveryDir.exists() && !recoveryDir.mkdirs()) {
            throw new IllegalStateException("Failed to create temp directory for test");
        }
    }

    @After
    public void cleanUp() throws Exception {
        if (recoveryDir != null) {
            FileUtils.deleteDirectory(recoveryDir);
        }
    }

    /**
     * Tests that with {@link HighAvailabilityMode#ZOOKEEPER} distributed JARs are recoverable from any
     * participating BlobServer.
     */
    @Test
    public void testBlobServerRecovery() throws Exception {
        Random rand = new Random();

        BlobServer[] server = new BlobServer[2];
        InetSocketAddress[] serverAddress = new InetSocketAddress[2];
        BlobClient client = null;

        try {
            Configuration config = new Configuration();
            config.setString(HighAvailabilityOptions.HA_MODE, "ZOOKEEPER");
            config.setString(ConfigConstants.STATE_BACKEND, "FILESYSTEM");
            config.setString(HighAvailabilityOptions.HA_STORAGE_PATH, recoveryDir.getPath());

            for (int i = 0; i < server.length; i++) {
                server[i] = new BlobServer(config);
                serverAddress[i] = new InetSocketAddress("localhost", server[i].getPort());
            }

            client = new BlobClient(serverAddress[0], config);

            // Random data
            byte[] expected = new byte[1024];
            rand.nextBytes(expected);

            BlobKey[] keys = new BlobKey[2];

            // Put data
            keys[0] = client.put(expected); // Request 1
            keys[1] = client.put(expected, 32, 256); // Request 2

            JobID[] jobId = new JobID[] { new JobID(), new JobID() };
            String[] testKey = new String[] { "test-key-1", "test-key-2" };

            client.put(jobId[0], testKey[0], expected); // Request 3
            client.put(jobId[1], testKey[1], expected, 32, 256); // Request 4

            // Close the client and connect to the other server
            client.close();
            client = new BlobClient(serverAddress[1], config);

            // Verify request 1
            try (InputStream is = client.get(keys[0])) {
                byte[] actual = new byte[expected.length];

                BlobUtils.readFully(is, actual, 0, expected.length, null);

                for (int i = 0; i < expected.length; i++) {
                    assertEquals(expected[i], actual[i]);
                }
            }

            // Verify request 2
            try (InputStream is = client.get(keys[1])) {
                byte[] actual = new byte[256];
                BlobUtils.readFully(is, actual, 0, 256, null);

                for (int i = 32, j = 0; i < 256; i++, j++) {
                    assertEquals(expected[i], actual[j]);
                }
            }

            // Verify request 3
            try (InputStream is = client.get(jobId[0], testKey[0])) {
                byte[] actual = new byte[expected.length];
                BlobUtils.readFully(is, actual, 0, expected.length, null);

                for (int i = 0; i < expected.length; i++) {
                    assertEquals(expected[i], actual[i]);
                }
            }

            // Verify request 4
            try (InputStream is = client.get(jobId[1], testKey[1])) {
                byte[] actual = new byte[256];
                BlobUtils.readFully(is, actual, 0, 256, null);

                for (int i = 32, j = 0; i < 256; i++, j++) {
                    assertEquals(expected[i], actual[j]);
                }
            }

            // Remove again
            client.delete(keys[0]);
            client.delete(keys[1]);
            client.delete(jobId[0], testKey[0]);
            client.delete(jobId[1], testKey[1]);
        } finally {
            for (BlobServer s : server) {
                if (s != null) {
                    s.shutdown();
                }
            }

            if (client != null) {
                client.close();
            }
        }

        // Verify everything is clean
        File[] recoveryFiles = recoveryDir.listFiles();
        assertEquals("Unclean state backend: " + Arrays.toString(recoveryFiles), 0, recoveryFiles.length);
    }
}