org.apache.flink.runtime.taskmanager.TestManagerStartupTest.java Source code

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Here is the source code for org.apache.flink.runtime.taskmanager.TestManagerStartupTest.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.taskmanager;

import static org.junit.Assert.*;

import org.apache.commons.io.FileUtils;
import org.apache.flink.configuration.ConfigConstants;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.configuration.IllegalConfigurationException;
import org.apache.flink.runtime.StreamingMode;
import org.junit.Test;

import java.io.File;
import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.util.UUID;

/**
 * Tests that check how the TaskManager behaves when encountering startup problems.
 */
public class TestManagerStartupTest {

    /**
     * Tests that the TaskManager fails synchronously when the actor system port
     * is in use.
     */
    @Test
    public void testStartupWhenTaskmanagerActorPortIsUsed() {
        ServerSocket blocker = null;
        try {
            final String localHostName = "localhost";
            final InetAddress localAddress = InetAddress.getByName(localHostName);

            // block some port
            blocker = new ServerSocket(0, 50, localAddress);
            final int port = blocker.getLocalPort();

            try {
                TaskManager.runTaskManager(localHostName, port, new Configuration(), StreamingMode.BATCH_ONLY,
                        TaskManager.class);
                fail("This should fail with an IOException");
            } catch (IOException e) {
                // expected. validate the error message
                assertNotNull(e.getMessage());
                assertTrue(e.getMessage().contains("Address already in use"));
            }

        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            if (blocker != null) {
                try {
                    blocker.close();
                } catch (IOException e) {
                    // no need to log here
                }
            }
        }
    }

    /**
     * Tests that the TaskManager startup fails synchronously when the I/O directories are
     * not writable.
     */
    @Test
    public void testIODirectoryNotWritable() {
        File tempDir = new File(ConfigConstants.DEFAULT_TASK_MANAGER_TMP_PATH);
        File nonWritable = new File(tempDir, UUID.randomUUID().toString());

        if (!nonWritable.mkdirs() || !nonWritable.setWritable(false, false)) {
            System.err.println("Cannot create non-writable temporary file directory. Skipping test.");
            return;
        }

        try {
            Configuration cfg = new Configuration();
            cfg.setString(ConfigConstants.TASK_MANAGER_TMP_DIR_KEY, nonWritable.getAbsolutePath());
            cfg.setInteger(ConfigConstants.TASK_MANAGER_MEMORY_SIZE_KEY, 4);
            cfg.setString(ConfigConstants.JOB_MANAGER_IPC_ADDRESS_KEY, "localhost");
            cfg.setInteger(ConfigConstants.JOB_MANAGER_IPC_PORT_KEY, 21656);

            try {
                TaskManager.runTaskManager("localhost", 0, cfg, StreamingMode.BATCH_ONLY);
                fail("Should fail synchronously with an exception");
            } catch (IOException e) {
                // splendid!
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            //noinspection ResultOfMethodCallIgnored
            nonWritable.setWritable(true, false);
            try {
                FileUtils.deleteDirectory(nonWritable);
            } catch (IOException e) {
                // best effort
            }
        }
    }

    /**
     * Tests that the TaskManager startup fails synchronously when the I/O directories are
     * not writable.
     */
    @Test
    public void testMemoryConfigWrong() {
        try {
            Configuration cfg = new Configuration();
            cfg.setString(ConfigConstants.JOB_MANAGER_IPC_ADDRESS_KEY, "localhost");
            cfg.setInteger(ConfigConstants.JOB_MANAGER_IPC_PORT_KEY, 21656);

            // something invalid
            cfg.setInteger(ConfigConstants.TASK_MANAGER_MEMORY_SIZE_KEY, -42);
            try {
                TaskManager.runTaskManager("localhost", 0, cfg, StreamingMode.BATCH_ONLY);
                fail("Should fail synchronously with an exception");
            } catch (IllegalConfigurationException e) {
                // splendid!
            }

            // something ridiculously high
            final long memSize = (((long) Integer.MAX_VALUE - 1)
                    * ConfigConstants.DEFAULT_TASK_MANAGER_NETWORK_BUFFER_SIZE) >> 20;
            cfg.setLong(ConfigConstants.TASK_MANAGER_MEMORY_SIZE_KEY, memSize);
            try {
                TaskManager.runTaskManager("localhost", 0, cfg, StreamingMode.BATCH_ONLY);
                fail("Should fail synchronously with an exception");
            } catch (Exception e) {
                // splendid!
                assertTrue(e.getCause() instanceof OutOfMemoryError);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }
}