org.apache.hadoop.fs.swift.TestSwiftFileSystemConcurrency.java Source code

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Here is the source code for org.apache.hadoop.fs.swift.TestSwiftFileSystemConcurrency.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.hadoop.fs.swift;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.swift.util.SwiftTestUtils;
import org.junit.Test;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

/**
 * Test Swift FS concurrency logic. This isn't a very accurate test,
 * because it is hard to consistently generate race conditions.
 * Consider it "best effort"
 */
public class TestSwiftFileSystemConcurrency extends SwiftFileSystemBaseTest {
    protected static final Log LOG = LogFactory.getLog(TestSwiftFileSystemConcurrency.class);
    private Exception thread1Ex, thread2Ex;
    public static final String TEST_RACE_CONDITION_ON_DELETE_DIR = "/test/testraceconditionondirdeletetest";

    /**
     * test on concurrent file system changes
     */
    @Test(timeout = SWIFT_TEST_TIMEOUT)
    public void testRaceConditionOnDirDeleteTest() throws Exception {
        SwiftTestUtils.skip("Skipping unreliable test");

        final String message = "message";
        final Path fileToRead = new Path(TEST_RACE_CONDITION_ON_DELETE_DIR + "/files/many-files/file");
        final ExecutorService executorService = Executors.newFixedThreadPool(2);
        fs.create(new Path(TEST_RACE_CONDITION_ON_DELETE_DIR + "/file/test/file1"));
        fs.create(new Path(TEST_RACE_CONDITION_ON_DELETE_DIR + "/documents/doc1"));
        fs.create(new Path(TEST_RACE_CONDITION_ON_DELETE_DIR + "/pictures/picture"));

        executorService.execute(new Runnable() {
            @Override
            public void run() {
                try {
                    assertDeleted(new Path(TEST_RACE_CONDITION_ON_DELETE_DIR), true);
                } catch (IOException e) {
                    LOG.warn("deletion thread:" + e, e);
                    thread1Ex = e;
                    throw new RuntimeException(e);
                }
            }
        });
        executorService.execute(new Runnable() {
            @Override
            public void run() {
                try {
                    final FSDataOutputStream outputStream = fs.create(fileToRead);
                    outputStream.write(message.getBytes());
                    outputStream.close();
                } catch (IOException e) {
                    LOG.warn("writer thread:" + e, e);
                    thread2Ex = e;
                    throw new RuntimeException(e);
                }
            }
        });

        executorService.awaitTermination(1, TimeUnit.MINUTES);
        if (thread1Ex != null) {
            throw thread1Ex;
        }
        if (thread2Ex != null) {
            throw thread2Ex;
        }
        try {
            fs.open(fileToRead);
            LOG.info("concurrency test failed to trigger a failure");
        } catch (FileNotFoundException expected) {

        }

    }
}