org.apache.hadoop.mapred.TestTaskLog.java Source code

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Here is the source code for org.apache.hadoop.mapred.TestTaskLog.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.mapred;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.io.FileUtils;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.mapred.TaskLog.LogName;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.junit.AfterClass;
import org.junit.Test;

/**
 * TestCounters checks the sanity and recoverability of Queue
 */
public class TestTaskLog {

    private static final String testDirName = TestTaskLog.class.getSimpleName();
    private static final String testDir = System.getProperty("test.build.data",
            "target" + File.separatorChar + "test-dir") + File.separatorChar + testDirName;

    @AfterClass
    public static void cleanup() {
        FileUtil.fullyDelete(new File(testDir));
    }

    /**
     * test TaskAttemptID
     * 
     * @throws IOException
     */
    @Test(timeout = 50000)
    public void testTaskLog() throws IOException {
        // test TaskLog
        System.setProperty(YarnConfiguration.YARN_APP_CONTAINER_LOG_DIR, "testString");
        assertEquals(TaskLog.getMRv2LogDir(), "testString");
        TaskAttemptID taid = mock(TaskAttemptID.class);
        JobID jid = new JobID("job", 1);

        when(taid.getJobID()).thenReturn(jid);
        when(taid.toString()).thenReturn("JobId");

        File f = TaskLog.getTaskLogFile(taid, true, LogName.STDOUT);
        assertTrue(f.getAbsolutePath().endsWith("testString" + File.separatorChar + "stdout"));

        // test getRealTaskLogFileLocation

        File indexFile = TaskLog.getIndexFile(taid, true);
        if (!indexFile.getParentFile().exists()) {
            indexFile.getParentFile().mkdirs();
        }
        indexFile.delete();
        indexFile.createNewFile();

        TaskLog.syncLogs(testDir, taid, true);

        assertTrue(indexFile.getAbsolutePath().endsWith("userlogs" + File.separatorChar + "job_job_0001"
                + File.separatorChar + "JobId.cleanup" + File.separatorChar + "log.index"));

        f = TaskLog.getRealTaskLogFileLocation(taid, true, LogName.DEBUGOUT);
        if (f != null) {
            assertTrue(f.getAbsolutePath().endsWith(testDirName + File.separatorChar + "debugout"));
            FileUtils.copyFile(indexFile, f);
        }
        // test obtainLogDirOwner
        assertTrue(TaskLog.obtainLogDirOwner(taid).length() > 0);
        // test TaskLog.Reader
        assertTrue(readTaskLog(TaskLog.LogName.DEBUGOUT, taid, true).length() > 0);
    }

    private String readTaskLog(TaskLog.LogName filter, org.apache.hadoop.mapred.TaskAttemptID taskId,
            boolean isCleanup) throws IOException {
        // string buffer to store task log
        StringBuilder result = new StringBuilder();
        int res;

        // reads the whole tasklog into inputstream
        InputStream taskLogReader = new TaskLog.Reader(taskId, filter, 0, -1, isCleanup);
        // construct string log from inputstream.
        byte[] b = new byte[65536];
        while (true) {
            res = taskLogReader.read(b);
            if (res > 0) {
                result.append(new String(b));
            } else {
                break;
            }
        }
        taskLogReader.close();

        // trim the string and return it
        String str = result.toString();
        str = str.trim();
        return str;
    }

    /**
     * test without TASK_LOG_DIR
     * 
     * @throws IOException
     */
    @Test(timeout = 50000)
    public void testTaskLogWithoutTaskLogDir() throws IOException {
        // TaskLog tasklog= new TaskLog();
        System.clearProperty(YarnConfiguration.YARN_APP_CONTAINER_LOG_DIR);

        // test TaskLog

        assertEquals(TaskLog.getMRv2LogDir(), null);
        TaskAttemptID taid = mock(TaskAttemptID.class);
        JobID jid = new JobID("job", 1);

        when(taid.getJobID()).thenReturn(jid);
        when(taid.toString()).thenReturn("JobId");

        File f = TaskLog.getTaskLogFile(taid, true, LogName.STDOUT);
        assertTrue(f.getAbsolutePath().endsWith("stdout"));

    }

}