Example usage for org.apache.hadoop.hdfs DistributedFileSystem getFileStatus

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs DistributedFileSystem getFileStatus.

Prototype

@Override
public FileStatus getFileStatus(Path f) throws IOException 

Source Link

Document

Returns the stat information about the file.

Usage

From source file:io.hops.erasure_coding.TestBlockReconstructor.java

License:Apache License

@Test
public void testSourceBlockRepair() throws IOException, InterruptedException {
    DistributedFileSystem dfs = (DistributedFileSystem) getFileSystem();
    TestDfsClient testDfsClient = new TestDfsClient(getConfig());
    testDfsClient.injectIntoDfs(dfs);// w w  w.  java2  s. c om
    FileStatus testFileStatus = dfs.getFileStatus(testFile);

    String path = testFileStatus.getPath().toUri().getPath();
    int blockToLoose = new Random(seed)
            .nextInt((int) (testFileStatus.getLen() / testFileStatus.getBlockSize()));
    LocatedBlock lb = dfs.getClient().getLocatedBlocks(path, 0, Long.MAX_VALUE).get(blockToLoose);
    DataNodeUtil.loseBlock(getCluster(), lb);
    List<LocatedBlock> lostBlocks = new ArrayList<LocatedBlock>();
    lostBlocks.add(lb);
    LocatedBlocks locatedBlocks = new LocatedBlocks(0, false, lostBlocks, null, true);
    testDfsClient.setMissingLocatedBlocks(locatedBlocks);

    LocatedBlocks missingBlocks = new LocatedBlocks(testFileStatus.getLen(), false,
            new ArrayList<LocatedBlock>(), null, true);
    missingBlocks.getLocatedBlocks().add(lb);
    BlockReconstructor blockReconstructor = new BlockReconstructor(conf);
    Decoder decoder = new Decoder(conf, Util.getCodec(Util.Codecs.SRC));
    blockReconstructor.processFile(testFile, testParityFile, missingBlocks, decoder, null);

    // Block is recovered to the same data node so no need to wait for the block report
    try {
        FSDataInputStream in = dfs.open(testFile);
        byte[] buff = new byte[TEST_BLOCK_COUNT * DFS_TEST_BLOCK_SIZE];
        in.readFully(0, buff);
    } catch (BlockMissingException e) {
        LOG.error("Reading failed", e);
        fail("Repair failed. Missing a block.");
    }
}

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From source file:io.hops.erasure_coding.TestBlockReconstructor.java

License:Apache License

@Test
public void testParityBlockRepair() throws IOException, InterruptedException {
    DistributedFileSystem dfs = (DistributedFileSystem) getFileSystem();
    TestDfsClient testDfsClient = new TestDfsClient(getConfig());
    testDfsClient.injectIntoDfs(dfs);/*  ww w. j a  v  a2s . com*/
    FileStatus parityFileStatus = dfs.getFileStatus(testParityFile);

    String path = parityFileStatus.getPath().toUri().getPath();
    int blockToLoose = new Random(seed)
            .nextInt((int) (parityFileStatus.getLen() / parityFileStatus.getBlockSize()));
    LocatedBlock lb = dfs.getClient().getLocatedBlocks(path, 0, Long.MAX_VALUE).get(blockToLoose);
    DataNodeUtil.loseBlock(getCluster(), lb);
    List<LocatedBlock> lostBlocks = new ArrayList<LocatedBlock>();
    lostBlocks.add(lb);
    LocatedBlocks locatedBlocks = new LocatedBlocks(0, false, lostBlocks, null, true);
    testDfsClient.setMissingLocatedBlocks(locatedBlocks);

    LocatedBlocks missingBlocks = new LocatedBlocks(parityFileStatus.getLen(), false,
            new ArrayList<LocatedBlock>(), null, true);
    missingBlocks.getLocatedBlocks().add(lb);
    BlockReconstructor blockReconstructor = new BlockReconstructor(conf);
    Decoder decoder = new Decoder(conf, Util.getCodec(Util.Codecs.SRC));
    blockReconstructor.processParityFile(testFile, testParityFile, missingBlocks, decoder, null);

    // Block is recovered to the same data node so no need to wait for the block report
    try {
        FSDataInputStream in = dfs.open(testParityFile);
        byte[] buff = new byte[DFS_TEST_BLOCK_SIZE * codec.parityLength];
        in.readFully(0, buff);
    } catch (BlockMissingException e) {
        LOG.error("Reading failed", e);
        fail("Repair failed. Missing a block.");
    }
}

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From source file:io.hops.erasure_coding.TestErasureCodingManagerEndless.java

License:Apache License

@Ignore
public void endlessSourceTest() throws IOException, InterruptedException {
    DistributedFileSystem dfs = (DistributedFileSystem) getFileSystem();

    Codec.initializeCodecs(getConfig());
    EncodingPolicy policy = new EncodingPolicy("src", (short) 1);
    Util.createRandomFile(dfs, testFile, seed, TEST_BLOCK_COUNT, DFS_TEST_BLOCK_SIZE, policy);
    FileStatus testFileStatus = dfs.getFileStatus(testFile);

    while (!dfs.getEncodingStatus(testFile.toUri().getPath()).isEncoded()) {
        try {/*from   w  w  w. ja v a 2 s.c  o  m*/
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            LOG.error("Wait for encoding thread was interrupted.");
        }
    }

    EncodingStatus status = dfs.getEncodingStatus(testFile.toUri().getPath());
    Path parityPath = new Path("/parity/" + status.getParityFileName());
    FileStatus parityStatus = dfs.getFileStatus(parityPath);
    assertEquals(parityStatus.getLen(), TEST_STRIPE_COUNT * TEST_PARITY_LENGTH * DFS_TEST_BLOCK_SIZE);
    try {
        FSDataInputStream in = dfs.open(parityPath);
        byte[] buff = new byte[TEST_STRIPE_COUNT * TEST_PARITY_LENGTH * DFS_TEST_BLOCK_SIZE];
        in.readFully(0, buff);
    } catch (BlockMissingException e) {
        LOG.error("Reading parity failed", e);
        fail("Parity could not be read.");
    }

    String path = testFileStatus.getPath().toUri().getPath();
    int blockToLoose = new Random(seed)
            .nextInt((int) (testFileStatus.getLen() / testFileStatus.getBlockSize()));
    LocatedBlock lb = dfs.getClient().getLocatedBlocks(path, 0, Long.MAX_VALUE).get(blockToLoose);
    DataNodeUtil.loseBlock(getCluster(), lb);
    LOG.info("Loosing block " + lb.toString());

    EncodingStatus lastStatus = null;
    while (true) {
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            LOG.warn("Was interrupted", e);
        }
        EncodingStatus status2 = dfs.getEncodingStatus(testFile.toUri().getPath());
        if (status2.equals(lastStatus) == false) {
            LOG.info("New status is " + status2.getStatus());
            lastStatus = status2;
        }
    }
}

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From source file:io.hops.erasure_coding.TestErasureCodingManagerEndless.java

License:Apache License

@Ignore
public void endlessParityTest() throws IOException, InterruptedException {
    DistributedFileSystem dfs = (DistributedFileSystem) getFileSystem();

    Codec.initializeCodecs(getConfig());
    EncodingPolicy policy = new EncodingPolicy("src", (short) 1);
    Util.createRandomFile(dfs, testFile, seed, TEST_BLOCK_COUNT, DFS_TEST_BLOCK_SIZE, policy);
    FileStatus testFileStatus = dfs.getFileStatus(testFile);

    while (!dfs.getEncodingStatus(testFile.toUri().getPath()).isEncoded()) {
        try {/*www.j a va2  s .  c  o  m*/
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            LOG.error("Wait for encoding thread was interrupted.");
        }
    }

    EncodingStatus status = dfs.getEncodingStatus(testFile.toUri().getPath());
    Path parityPath = new Path("/parity/" + status.getParityFileName());
    FileStatus parityStatus = dfs.getFileStatus(parityPath);
    assertEquals(parityStatus.getLen(), TEST_STRIPE_COUNT * TEST_PARITY_LENGTH * DFS_TEST_BLOCK_SIZE);
    try {
        FSDataInputStream in = dfs.open(parityPath);
        byte[] buff = new byte[TEST_STRIPE_COUNT * TEST_PARITY_LENGTH * DFS_TEST_BLOCK_SIZE];
        in.readFully(0, buff);
    } catch (BlockMissingException e) {
        LOG.error("Reading parity failed", e);
        fail("Parity could not be read.");
    }

    int blockToLoose = new Random(seed).nextInt((int) (parityStatus.getLen() / parityStatus.getBlockSize()));
    LocatedBlock lb = dfs.getClient().getLocatedBlocks(parityPath.toUri().getPath(), 0, Long.MAX_VALUE)
            .get(blockToLoose);
    DataNodeUtil.loseBlock(getCluster(), lb);
    LOG.info("Loosing block " + lb.toString());

    try {
        FSDataInputStream in = dfs.open(parityPath);
        byte[] buff = new byte[TEST_STRIPE_COUNT * TEST_PARITY_LENGTH * DFS_TEST_BLOCK_SIZE];
        in.readFully(0, buff);
        fail("Successfully read parity file which should have been broken.");
    } catch (BlockMissingException e) {
    }

    EncodingStatus lastStatus = null;
    while (true) {
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            LOG.warn("Was interrupted", e);
        }
        EncodingStatus status2 = dfs.getEncodingStatus(testFile.toUri().getPath());
        if (status2.equals(lastStatus) == false) {
            LOG.info("New status is " + status2);
            lastStatus = status2;
        }
    }
}

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From source file:io.hops.erasure_coding.TestMapReduceBlockRepairManager.java

License:Apache License

@Test
public void testBlockRepair() throws IOException, InterruptedException {
    DistributedFileSystem dfs = (DistributedFileSystem) getFileSystem();
    TestDfsClient testDfsClient = new TestDfsClient(getConfig());
    testDfsClient.injectIntoDfs(dfs);//from   w  w  w.j  av a2  s .  c  om

    MapReduceEncodingManager encodingManager = new MapReduceEncodingManager(conf);

    Util.createRandomFile(dfs, testFile, seed, TEST_BLOCK_COUNT, DFS_TEST_BLOCK_SIZE);
    Codec.initializeCodecs(conf);
    FileStatus testFileStatus = dfs.getFileStatus(testFile);
    EncodingPolicy policy = new EncodingPolicy("src", (short) 1);
    encodingManager.encodeFile(policy, testFile, parityFile);

    // Busy waiting until the encoding is done
    while (encodingManager.computeReports().size() > 0) {
        ;
    }

    String path = testFileStatus.getPath().toUri().getPath();
    int blockToLoose = new Random(seed)
            .nextInt((int) (testFileStatus.getLen() / testFileStatus.getBlockSize()));
    LocatedBlock lb = dfs.getClient().getLocatedBlocks(path, 0, Long.MAX_VALUE).get(blockToLoose);
    DataNodeUtil.loseBlock(getCluster(), lb);
    List<LocatedBlock> lostBlocks = new ArrayList<LocatedBlock>();
    lostBlocks.add(lb);
    LocatedBlocks locatedBlocks = new LocatedBlocks(0, false, lostBlocks, null, true);
    testDfsClient.setMissingLocatedBlocks(locatedBlocks);
    LOG.info("Loosing block " + lb.toString());
    getCluster().triggerBlockReports();

    MapReduceBlockRepairManager repairManager = new MapReduceBlockRepairManager(conf);
    repairManager.repairSourceBlocks("src", testFile, parityFile);

    while (true) {
        List<Report> reports = repairManager.computeReports();
        if (reports.size() == 0) {
            break;
        }
        LOG.info(reports.get(0).getStatus());
        System.out.println("WAIT");
        Thread.sleep(1000);
    }

    try {
        FSDataInputStream in = dfs.open(testFile);
        byte[] buff = new byte[TEST_BLOCK_COUNT * DFS_TEST_BLOCK_SIZE];
        in.readFully(0, buff);
    } catch (BlockMissingException e) {
        fail("Repair failed. Missing a block.");
    }
}

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From source file:io.hops.erasure_coding.TestMapReduceBlockRepairManager.java

License:Apache License

@Test
public void testCorruptedRepair() throws IOException, InterruptedException {
    DistributedFileSystem dfs = (DistributedFileSystem) getFileSystem();
    TestDfsClient testDfsClient = new TestDfsClient(getConfig());
    testDfsClient.injectIntoDfs(dfs);//from   w w w.  j a  v  a 2 s.  c o  m

    MapReduceEncodingManager encodingManager = new MapReduceEncodingManager(conf);

    Util.createRandomFile(dfs, testFile, seed, TEST_BLOCK_COUNT, DFS_TEST_BLOCK_SIZE);
    Codec.initializeCodecs(conf);
    FileStatus testFileStatus = dfs.getFileStatus(testFile);
    EncodingPolicy policy = new EncodingPolicy("src", (short) 1);
    encodingManager.encodeFile(policy, testFile, parityFile);

    // Busy waiting until the encoding is done
    while (encodingManager.computeReports().size() > 0) {
        ;
    }

    String path = testFileStatus.getPath().toUri().getPath();
    int blockToLoose = new Random(seed)
            .nextInt((int) (testFileStatus.getLen() / testFileStatus.getBlockSize()));
    LocatedBlock lb = dfs.getClient().getLocatedBlocks(path, 0, Long.MAX_VALUE).get(blockToLoose);
    DataNodeUtil.loseBlock(getCluster(), lb);
    List<LocatedBlock> lostBlocks = new ArrayList<LocatedBlock>();
    lostBlocks.add(lb);
    LocatedBlocks locatedBlocks = new LocatedBlocks(0, false, lostBlocks, null, true);
    testDfsClient.setMissingLocatedBlocks(locatedBlocks);
    LOG.info("Loosing block " + lb.toString());
    getCluster().triggerBlockReports();

    dfs.getClient().addBlockChecksum(testFile.toUri().getPath(),
            (int) (lb.getStartOffset() / lb.getBlockSize()), 0);

    MapReduceBlockRepairManager repairManager = new MapReduceBlockRepairManager(conf);
    repairManager.repairSourceBlocks("src", testFile, parityFile);

    while (true) {
        List<Report> reports = repairManager.computeReports();
        if (reports.size() == 0) {
            break;
        }
        LOG.info(reports.get(0).getStatus());
        System.out.println("WAIT");
        Thread.sleep(1000);
    }

    try {
        FSDataInputStream in = dfs.open(testFile);
        byte[] buff = new byte[TEST_BLOCK_COUNT * DFS_TEST_BLOCK_SIZE];
        in.readFully(0, buff);
        fail("Repair succeeded with bogus checksum.");
    } catch (BlockMissingException e) {
    }
}

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From source file:io.hops.erasure_coding.TestMapReduceEncodingManager.java

License:Apache License

@Test
public void testRaidFiles() throws IOException {
    DistributedFileSystem dfs = (DistributedFileSystem) getFileSystem();
    MapReduceEncodingManager encodingManager = new MapReduceEncodingManager(conf);

    Util.createRandomFile(dfs, testFile, seed, TEST_BLOCK_COUNT, DFS_TEST_BLOCK_SIZE);
    FileStatus testFileStatus = dfs.getFileStatus(testFile);
    Codec.initializeCodecs(conf);
    EncodingPolicy policy = new EncodingPolicy("src", (short) 1);
    encodingManager.encodeFile(policy, testFile, parityFile);

    // Busy waiting until the encoding is done
    while (encodingManager.computeReports().size() > 0) {
        ;//from w  w  w.j  a  va2 s.c o m
    }
    FileStatus parityStatus = dfs.getFileStatus(parityFile);
    assertEquals(parityStatus.getLen(), 6 * DFS_TEST_BLOCK_SIZE);
    try {
        FSDataInputStream in = dfs.open(parityFile);
        byte[] buff = new byte[6 * DFS_TEST_BLOCK_SIZE];
        in.readFully(0, buff);
    } catch (BlockMissingException e) {
        LOG.error("Reading parity failed", e);
        fail("Parity could not be read.");
    }
}

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