org.apache.hadoop.hive.ql.session.TestClearDanglingScratchDir.java Source code

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Here is the source code for org.apache.hadoop.hive.ql.session.TestClearDanglingScratchDir.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.hive.ql.session;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.UUID;

import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.util.Shell;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.slf4j.LoggerFactory;

public class TestClearDanglingScratchDir {
    private static MiniDFSCluster m_dfs = null;
    private static HiveConf conf;
    private static Path scratchDir;
    private ByteArrayOutputStream stdout;
    private ByteArrayOutputStream stderr;
    private PrintStream origStdoutPs;
    private PrintStream origStderrPs;

    @BeforeClass
    static public void oneTimeSetup() throws Exception {
        m_dfs = new MiniDFSCluster.Builder(new Configuration()).numDataNodes(1).format(true).build();
        conf = new HiveConf();
        conf.set(HiveConf.ConfVars.HIVE_SCRATCH_DIR_LOCK.toString(), "true");
        conf.set(HiveConf.ConfVars.METASTORE_AUTO_CREATE_ALL.toString(), "true");
        LoggerFactory.getLogger("SessionState");
        conf.setVar(HiveConf.ConfVars.METASTOREWAREHOUSE,
                new Path(System.getProperty("test.tmp.dir"), "warehouse").toString());
        conf.set(CommonConfigurationKeysPublic.FS_DEFAULT_NAME_KEY, m_dfs.getFileSystem().getUri().toString());

        scratchDir = new Path(HiveConf.getVar(conf, HiveConf.ConfVars.SCRATCHDIR));
        m_dfs.getFileSystem().mkdirs(scratchDir);
        m_dfs.getFileSystem().setPermission(scratchDir, new FsPermission("777"));
    }

    @AfterClass
    static public void shutdown() throws Exception {
        m_dfs.shutdown();
    }

    public void redirectStdOutErr() {
        stdout = new ByteArrayOutputStream();
        PrintStream psStdout = new PrintStream(stdout);
        origStdoutPs = System.out;
        System.setOut(psStdout);

        stderr = new ByteArrayOutputStream();
        PrintStream psStderr = new PrintStream(stderr);
        origStderrPs = System.err;
        System.setErr(psStderr);
    }

    public void rollbackStdOutErr() {
        System.setOut(origStdoutPs);
        System.setErr(origStderrPs);
    }

    @Test
    public void testClearDanglingScratchDir() throws Exception {

        // No scratch dir initially
        redirectStdOutErr();
        ClearDanglingScratchDir.main(new String[] { "-v", "-s",
                m_dfs.getFileSystem().getUri().toString() + scratchDir.toUri().toString() });
        rollbackStdOutErr();
        Assert.assertTrue(stderr.toString().contains("Cannot find any scratch directory to clear"));

        // Create scratch dir without lock files
        m_dfs.getFileSystem().mkdirs(new Path(new Path(scratchDir, "dummy"), UUID.randomUUID().toString()));
        redirectStdOutErr();
        ClearDanglingScratchDir.main(new String[] { "-v", "-s",
                m_dfs.getFileSystem().getUri().toString() + scratchDir.toUri().toString() });
        rollbackStdOutErr();
        Assert.assertEquals(StringUtils.countMatches(stderr.toString(),
                "since it does not contain " + SessionState.LOCK_FILE_NAME), 1);
        Assert.assertTrue(stderr.toString().contains("Cannot find any scratch directory to clear"));

        // One live session
        SessionState ss = SessionState.start(conf);
        redirectStdOutErr();
        ClearDanglingScratchDir.main(new String[] { "-v", "-s",
                m_dfs.getFileSystem().getUri().toString() + scratchDir.toUri().toString() });
        rollbackStdOutErr();
        Assert.assertEquals(StringUtils.countMatches(stderr.toString(), "is being used by live process"), 1);

        // One dead session with dry-run
        ss.releaseSessionLockFile();
        redirectStdOutErr();
        ClearDanglingScratchDir.main(new String[] { "-r", "-v", "-s",
                m_dfs.getFileSystem().getUri().toString() + scratchDir.toUri().toString() });
        rollbackStdOutErr();
        // Find one session dir to remove
        Assert.assertFalse(stdout.toString().isEmpty());

        // Remove the dead session dir
        redirectStdOutErr();
        ClearDanglingScratchDir.main(new String[] { "-v", "-s",
                m_dfs.getFileSystem().getUri().toString() + scratchDir.toUri().toString() });
        rollbackStdOutErr();
        Assert.assertTrue(stderr.toString().contains("Removing 1 scratch directories"));
        Assert.assertEquals(StringUtils.countMatches(stderr.toString(), "removed"), 1);
        ss.close();
    }
}