public static void main(String[] args) throws IOException {
    Path baseDir = null;
    String localPath = null;
    String preservePath = null;
    String sIgnoreTablesFilename = null;
    String sNoPreserveFilename = null;
    String sDateString = null;
    long size = 0;

    // UNIX dates for right now
    long now = new java.util.Date().getTime() / 1000;
    long maxDate = now;

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("--hdfs-path")) {
        baseDir = new Path(args[++i]);
        continue;
      }
      if (args[i].equals("--local-path")) {
        localPath = args[++i];
        continue;
      }
      if (args[i].equals("--preserve-path")) {
        preservePath = args[++i];
        continue;
      }
      if (args[i].equals("--no-preserve")) {
        sNoPreserveFilename = args[++i];
        continue;
      }
      if (args[i].equals("--ignore-tables")) {
        sIgnoreTablesFilename = args[++i];
        continue;
      }
      if (args[i].equals("--sleep")) {
        try {
          m_nSleepSeconds = Integer.parseInt(args[++i]);
        } catch (Exception e) {
          System.err.println("ERROR: " + e.toString() + "\n");
          usage();
        }
        continue;
      }
      if (args[i].equals("--dry-run")) {
        m_bDryRun = true;
        continue;
      }
      if (args[i].equals("--date")) {
        sDateString = args[++i];
        continue;
      }
      if (args[i].equals("--max-date")) {
        maxDate = Long.parseLong(args[++i]);
        continue;
      }
      if (args[i].equals("--max-bytes")) {
        size = Long.parseLong(args[++i]);
        continue;
      }

      System.err.println("ERROR: unknown arg " + args[i]);
      usage();
    }

    if (baseDir == null || localPath == null || preservePath == null || sDateString == null) {
      usage();
    }

    long minDate;

    if ("yesterday".equals(sDateString)) {
      // figure out yesterday's dates
      Calendar cal = Calendar.getInstance();
      cal.roll(Calendar.DAY_OF_YEAR, -1);

      // yesterday midnight
      cal.set(Calendar.HOUR_OF_DAY, 0);
      cal.set(Calendar.MINUTE, 0);
      cal.set(Calendar.SECOND, 0);
      cal.set(Calendar.MILLISECOND, 0);

      minDate = cal.getTimeInMillis() / 1000;

      // yesterday end of day
      cal.set(Calendar.HOUR_OF_DAY, 23);
      cal.set(Calendar.MINUTE, 59);
      cal.set(Calendar.SECOND, 59);
      cal.set(Calendar.MILLISECOND, 999);

      maxDate = cal.getTimeInMillis() / 1000;
    } else if ("last-week".equals(sDateString)) {
      minDate = maxDate - (7 * 24 * 60 * 60);
    } else if ("last-day".equals(sDateString)) {
      minDate = maxDate - (24 * 60 * 60);
    } else {
      // UNIX date since epoch of last backup
      minDate = Long.parseLong(sDateString);
    }

    long tmpDate = 0;
    BackupHdfs bak = new BackupHdfs();

    // initialize the list of tables to ignore
    if (sIgnoreTablesFilename != null) {
      bak.initializeTablesToIgnore(sIgnoreTablesFilename);
    }

    // initialize list of files to not preserve
    if (sNoPreserveFilename != null) {
      bak.initializeNoPreserve(sNoPreserveFilename);
    }

    ArrayList<Path> pathList = new ArrayList<Path>(2000);
    HashMap<Path, Long> hmTimestamps = new HashMap<Path, Long>();

    Configuration conf = new Configuration();
    FileSystem fs = FileSystem.get(conf);

    // If the HDFS path is a dir continue
    if (fs.getFileStatus(baseDir).isDir()) {
      Calendar cal = Calendar.getInstance();

      System.err.println("");
      cal.setTimeInMillis(minDate * 1000);
      System.err.println("min date = " + cal.getTime().toString());

      cal.setTimeInMillis(maxDate * 1000);
      System.err.println("max date = " + cal.getTime().toString());

      System.err.println("");
      System.err.println("Searching filesystem: " + baseDir.toUri().getPath());

      bak.checkDir(fs, minDate, maxDate, baseDir, pathList, hmTimestamps);

      System.err.println("");
      System.err.println("Skipped " + m_nIgnoredTables + " files due to ignored tables");

      System.err.println("");
      System.err.println("Number of files to backup = " + pathList.size());

      System.err.println("Total bytes to backup = " + prettyPrintBytes(m_nTotalBytes));

      System.err.println("");
      System.err.println("sorting list of files...");
      Collections.sort(pathList, new DateComparator(hmTimestamps));
      System.err.println("done");

      System.err.println("");
      System.err.println("starting backup...");
      tmpDate = bak.backupFiles(localPath, preservePath, fs, pathList, size);

      bak.closeFiles();

      System.err.println("");
      System.err.println("backup completed...");
    }

    if (tmpDate == 0) {
      // If not size limit reached print out date for right now
      System.out.println(maxDate);
    } else {
      // Print out date for last file backed up
      System.err.println("Size limit reached.");
      System.out.println(tmpDate);
    }

    System.exit(0);
  }
Beispiel #2
0
  /**
   * Combine the status stored in the index and the underlying status.
   *
   * @param h status stored in the index
   * @param cache caching the underlying file statuses
   * @return the combined file status
   * @throws IOException
   */
  private FileStatus toFileStatus(HarStatus h, Map<String, FileStatus> cache) throws IOException {
    FileStatus underlying = null;
    if (cache != null) {
      underlying = cache.get(h.partName);
    }
    if (underlying == null) {
      final Path p = h.isDir ? archivePath : new Path(archivePath, h.partName);
      underlying = fs.getFileStatus(p);
      if (cache != null) {
        cache.put(h.partName, underlying);
      }
    }

    long modTime = 0;
    int version = metadata.getVersion();
    if (version < 3) {
      modTime = underlying.getModificationTime();
    } else if (version == 3) {
      modTime = h.getModificationTime();
    }

    return new FileStatus(
        h.isDir() ? 0L : h.getLength(),
        h.isDir(),
        underlying.getReplication(),
        underlying.getBlockSize(),
        modTime,
        underlying.getAccessTime(),
        underlying.getPermission(),
        underlying.getOwner(),
        underlying.getGroup(),
        makeRelative(this.uri.getPath(), new Path(h.name)));
  }
Beispiel #3
0
  /**
   * Initialize a Har filesystem per har archive. The archive home directory is the top level
   * directory in the filesystem that contains the HAR archive. Be careful with this method, you do
   * not want to go on creating new Filesystem instances per call to path.getFileSystem(). the uri
   * of Har is har://underlyingfsscheme-host:port/archivepath. or har:///archivepath. This assumes
   * the underlying filesystem to be used in case not specified.
   */
  @Override
  public void initialize(URI name, Configuration conf) throws IOException {
    // initialize the metadata cache, if needed
    initializeMetadataCache(conf);

    // decode the name
    URI underLyingURI = decodeHarURI(name, conf);
    // we got the right har Path- now check if this is
    // truly a har filesystem
    Path harPath = archivePath(new Path(name.getScheme(), name.getAuthority(), name.getPath()));
    if (harPath == null) {
      throw new IOException("Invalid path for the Har Filesystem. " + name.toString());
    }
    if (fs == null) {
      fs = FileSystem.get(underLyingURI, conf);
    }
    uri = harPath.toUri();
    archivePath = new Path(uri.getPath());
    harAuth = getHarAuth(underLyingURI);
    // check for the underlying fs containing
    // the index file
    Path masterIndexPath = new Path(archivePath, "_masterindex");
    Path archiveIndexPath = new Path(archivePath, "_index");
    if (!fs.exists(masterIndexPath) || !fs.exists(archiveIndexPath)) {
      throw new IOException(
          "Invalid path for the Har Filesystem. " + "No index file in " + harPath);
    }

    metadata = harMetaCache.get(uri);
    if (metadata != null) {
      FileStatus mStat = fs.getFileStatus(masterIndexPath);
      FileStatus aStat = fs.getFileStatus(archiveIndexPath);
      if (mStat.getModificationTime() != metadata.getMasterIndexTimestamp()
          || aStat.getModificationTime() != metadata.getArchiveIndexTimestamp()) {
        // the archive has been overwritten since we last read it
        // remove the entry from the meta data cache
        metadata = null;
        harMetaCache.remove(uri);
      }
    }
    if (metadata == null) {
      metadata = new HarMetaData(fs, masterIndexPath, archiveIndexPath);
      metadata.parseMetaData();
      harMetaCache.put(uri, metadata);
    }
  }
Beispiel #4
0
 public FileStatus getPartFileStatus(Path partPath) throws IOException {
   FileStatus status;
   status = partFileStatuses.get(partPath);
   if (status == null) {
     status = fs.getFileStatus(partPath);
     partFileStatuses.put(partPath, status);
   }
   return status;
 }
Beispiel #5
0
  /**
   * Launch application for the dag represented by this client.
   *
   * @throws YarnException
   * @throws IOException
   */
  public void startApplication() throws YarnException, IOException {
    Class<?>[] defaultClasses;

    if (applicationType.equals(YARN_APPLICATION_TYPE)) {
      // TODO restrict the security check to only check if security is enabled for webservices.
      if (UserGroupInformation.isSecurityEnabled()) {
        defaultClasses = DATATORRENT_SECURITY_CLASSES;
      } else {
        defaultClasses = DATATORRENT_CLASSES;
      }
    } else {
      throw new IllegalStateException(applicationType + " is not a valid application type.");
    }

    LinkedHashSet<String> localJarFiles = findJars(dag, defaultClasses);

    if (resources != null) {
      localJarFiles.addAll(resources);
    }

    YarnClusterMetrics clusterMetrics = yarnClient.getYarnClusterMetrics();
    LOG.info(
        "Got Cluster metric info from ASM"
            + ", numNodeManagers="
            + clusterMetrics.getNumNodeManagers());

    // GetClusterNodesRequest clusterNodesReq = Records.newRecord(GetClusterNodesRequest.class);
    // GetClusterNodesResponse clusterNodesResp =
    // rmClient.clientRM.getClusterNodes(clusterNodesReq);
    // LOG.info("Got Cluster node info from ASM");
    // for (NodeReport node : clusterNodesResp.getNodeReports()) {
    //  LOG.info("Got node report from ASM for"
    //           + ", nodeId=" + node.getNodeId()
    //           + ", nodeAddress" + node.getHttpAddress()
    //           + ", nodeRackName" + node.getRackName()
    //           + ", nodeNumContainers" + node.getNumContainers()
    //           + ", nodeHealthStatus" + node.getHealthReport());
    // }
    List<QueueUserACLInfo> listAclInfo = yarnClient.getQueueAclsInfo();
    for (QueueUserACLInfo aclInfo : listAclInfo) {
      for (QueueACL userAcl : aclInfo.getUserAcls()) {
        LOG.info(
            "User ACL Info for Queue"
                + ", queueName="
                + aclInfo.getQueueName()
                + ", userAcl="
                + userAcl.name());
      }
    }

    // Get a new application id
    YarnClientApplication newApp = yarnClient.createApplication();
    appId = newApp.getNewApplicationResponse().getApplicationId();

    // Dump out information about cluster capability as seen by the resource manager
    int maxMem = newApp.getNewApplicationResponse().getMaximumResourceCapability().getMemory();
    LOG.info("Max mem capabililty of resources in this cluster " + maxMem);
    int amMemory = dag.getMasterMemoryMB();
    if (amMemory > maxMem) {
      LOG.info(
          "AM memory specified above max threshold of cluster. Using max value."
              + ", specified="
              + amMemory
              + ", max="
              + maxMem);
      amMemory = maxMem;
    }

    if (dag.getAttributes().get(LogicalPlan.APPLICATION_ID) == null) {
      dag.setAttribute(LogicalPlan.APPLICATION_ID, appId.toString());
    }

    // Create launch context for app master
    LOG.info("Setting up application submission context for ASM");
    ApplicationSubmissionContext appContext = Records.newRecord(ApplicationSubmissionContext.class);

    // set the application id
    appContext.setApplicationId(appId);
    // set the application name
    appContext.setApplicationName(dag.getValue(LogicalPlan.APPLICATION_NAME));
    appContext.setApplicationType(this.applicationType);
    if (YARN_APPLICATION_TYPE.equals(this.applicationType)) {
      // appContext.setMaxAppAttempts(1); // no retries until Stram is HA
    }

    // Set up the container launch context for the application master
    ContainerLaunchContext amContainer = Records.newRecord(ContainerLaunchContext.class);

    // Setup security tokens
    // If security is enabled get ResourceManager and NameNode delegation tokens.
    // Set these tokens on the container so that they are sent as part of application submission.
    // This also sets them up for renewal by ResourceManager. The NameNode delegation rmToken
    // is also used by ResourceManager to fetch the jars from HDFS and set them up for the
    // application master launch.
    if (UserGroupInformation.isSecurityEnabled()) {
      Credentials credentials = new Credentials();
      String tokenRenewer = conf.get(YarnConfiguration.RM_PRINCIPAL);
      if (tokenRenewer == null || tokenRenewer.length() == 0) {
        throw new IOException("Can't get Master Kerberos principal for the RM to use as renewer");
      }

      // For now, only getting tokens for the default file-system.
      FileSystem fs = StramClientUtils.newFileSystemInstance(conf);
      try {
        final Token<?> tokens[] = fs.addDelegationTokens(tokenRenewer, credentials);
        if (tokens != null) {
          for (Token<?> token : tokens) {
            LOG.info("Got dt for " + fs.getUri() + "; " + token);
          }
        }
      } finally {
        fs.close();
      }

      addRMDelegationToken(tokenRenewer, credentials);

      DataOutputBuffer dob = new DataOutputBuffer();
      credentials.writeTokenStorageToStream(dob);
      ByteBuffer fsTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());
      amContainer.setTokens(fsTokens);
    }

    // set local resources for the application master
    // local files or archives as needed
    // In this scenario, the jar file for the application master is part of the local resources
    Map<String, LocalResource> localResources = new HashMap<String, LocalResource>();

    // copy required jar files to dfs, to be localized for containers
    FileSystem fs = StramClientUtils.newFileSystemInstance(conf);
    try {
      Path appsBasePath =
          new Path(StramClientUtils.getDTDFSRootDir(fs, conf), StramClientUtils.SUBDIR_APPS);
      Path appPath = new Path(appsBasePath, appId.toString());

      String libJarsCsv = copyFromLocal(fs, appPath, localJarFiles.toArray(new String[] {}));

      LOG.info("libjars: {}", libJarsCsv);
      dag.getAttributes().put(LogicalPlan.LIBRARY_JARS, libJarsCsv);
      LaunchContainerRunnable.addFilesToLocalResources(
          LocalResourceType.FILE, libJarsCsv, localResources, fs);

      if (archives != null) {
        String[] localFiles = archives.split(",");
        String archivesCsv = copyFromLocal(fs, appPath, localFiles);
        LOG.info("archives: {}", archivesCsv);
        dag.getAttributes().put(LogicalPlan.ARCHIVES, archivesCsv);
        LaunchContainerRunnable.addFilesToLocalResources(
            LocalResourceType.ARCHIVE, archivesCsv, localResources, fs);
      }

      if (files != null) {
        String[] localFiles = files.split(",");
        String filesCsv = copyFromLocal(fs, appPath, localFiles);
        LOG.info("files: {}", filesCsv);
        dag.getAttributes().put(LogicalPlan.FILES, filesCsv);
        LaunchContainerRunnable.addFilesToLocalResources(
            LocalResourceType.FILE, filesCsv, localResources, fs);
      }

      dag.getAttributes().put(LogicalPlan.APPLICATION_PATH, appPath.toString());
      if (dag.getAttributes().get(OperatorContext.STORAGE_AGENT) == null) {
          /* which would be the most likely case */
        Path checkpointPath = new Path(appPath, LogicalPlan.SUBDIR_CHECKPOINTS);
        // use conf client side to pickup any proxy settings from dt-site.xml
        dag.setAttribute(
            OperatorContext.STORAGE_AGENT, new FSStorageAgent(checkpointPath.toString(), conf));
      }
      if (dag.getAttributes().get(LogicalPlan.CONTAINER_OPTS_CONFIGURATOR) == null) {
        dag.setAttribute(
            LogicalPlan.CONTAINER_OPTS_CONFIGURATOR, new BasicContainerOptConfigurator());
      }

      // Set the log4j properties if needed
      if (!log4jPropFile.isEmpty()) {
        Path log4jSrc = new Path(log4jPropFile);
        Path log4jDst = new Path(appPath, "log4j.props");
        fs.copyFromLocalFile(false, true, log4jSrc, log4jDst);
        FileStatus log4jFileStatus = fs.getFileStatus(log4jDst);
        LocalResource log4jRsrc = Records.newRecord(LocalResource.class);
        log4jRsrc.setType(LocalResourceType.FILE);
        log4jRsrc.setVisibility(LocalResourceVisibility.APPLICATION);
        log4jRsrc.setResource(ConverterUtils.getYarnUrlFromURI(log4jDst.toUri()));
        log4jRsrc.setTimestamp(log4jFileStatus.getModificationTime());
        log4jRsrc.setSize(log4jFileStatus.getLen());
        localResources.put("log4j.properties", log4jRsrc);
      }

      if (originalAppId != null) {
        Path origAppPath = new Path(appsBasePath, this.originalAppId);
        LOG.info("Restart from {}", origAppPath);
        copyInitialState(origAppPath);
      }

      // push logical plan to DFS location
      Path cfgDst = new Path(appPath, LogicalPlan.SER_FILE_NAME);
      FSDataOutputStream outStream = fs.create(cfgDst, true);
      LogicalPlan.write(this.dag, outStream);
      outStream.close();

      Path launchConfigDst = new Path(appPath, LogicalPlan.LAUNCH_CONFIG_FILE_NAME);
      outStream = fs.create(launchConfigDst, true);
      conf.writeXml(outStream);
      outStream.close();

      FileStatus topologyFileStatus = fs.getFileStatus(cfgDst);
      LocalResource topologyRsrc = Records.newRecord(LocalResource.class);
      topologyRsrc.setType(LocalResourceType.FILE);
      topologyRsrc.setVisibility(LocalResourceVisibility.APPLICATION);
      topologyRsrc.setResource(ConverterUtils.getYarnUrlFromURI(cfgDst.toUri()));
      topologyRsrc.setTimestamp(topologyFileStatus.getModificationTime());
      topologyRsrc.setSize(topologyFileStatus.getLen());
      localResources.put(LogicalPlan.SER_FILE_NAME, topologyRsrc);

      // Set local resource info into app master container launch context
      amContainer.setLocalResources(localResources);

      // Set the necessary security tokens as needed
      // amContainer.setContainerTokens(containerToken);
      // Set the env variables to be setup in the env where the application master will be run
      LOG.info("Set the environment for the application master");
      Map<String, String> env = new HashMap<String, String>();

      // Add application jar(s) location to classpath
      // At some point we should not be required to add
      // the hadoop specific classpaths to the env.
      // It should be provided out of the box.
      // For now setting all required classpaths including
      // the classpath to "." for the application jar(s)
      // including ${CLASSPATH} will duplicate the class path in app master, removing it for now
      // StringBuilder classPathEnv = new StringBuilder("${CLASSPATH}:./*");
      StringBuilder classPathEnv = new StringBuilder("./*");
      String classpath = conf.get(YarnConfiguration.YARN_APPLICATION_CLASSPATH);
      for (String c :
          StringUtils.isBlank(classpath)
              ? YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH
              : classpath.split(",")) {
        if (c.equals("$HADOOP_CLIENT_CONF_DIR")) {
          // SPOI-2501
          continue;
        }
        classPathEnv.append(':');
        classPathEnv.append(c.trim());
      }
      env.put("CLASSPATH", classPathEnv.toString());
      // propagate to replace node managers user name (effective in non-secure mode)
      env.put("HADOOP_USER_NAME", UserGroupInformation.getLoginUser().getUserName());

      amContainer.setEnvironment(env);

      // Set the necessary command to execute the application master
      ArrayList<CharSequence> vargs = new ArrayList<CharSequence>(30);

      // Set java executable command
      LOG.info("Setting up app master command");
      vargs.add(javaCmd);
      if (dag.isDebug()) {
        vargs.add("-agentlib:jdwp=transport=dt_socket,server=y,suspend=n");
      }
      // Set Xmx based on am memory size
      // default heap size 75% of total memory
      vargs.add("-Xmx" + (amMemory * 3 / 4) + "m");
      vargs.add("-XX:+HeapDumpOnOutOfMemoryError");
      vargs.add("-XX:HeapDumpPath=/tmp/dt-heap-" + appId.getId() + ".bin");
      vargs.add("-Dhadoop.root.logger=" + (dag.isDebug() ? "DEBUG" : "INFO") + ",RFA");
      vargs.add("-Dhadoop.log.dir=" + ApplicationConstants.LOG_DIR_EXPANSION_VAR);
      vargs.add(String.format("-D%s=%s", StreamingContainer.PROP_APP_PATH, dag.assertAppPath()));
      if (dag.isDebug()) {
        vargs.add("-Dlog4j.debug=true");
      }

      String loggersLevel = conf.get(DTLoggerFactory.DT_LOGGERS_LEVEL);
      if (loggersLevel != null) {
        vargs.add(String.format("-D%s=%s", DTLoggerFactory.DT_LOGGERS_LEVEL, loggersLevel));
      }
      vargs.add(StreamingAppMaster.class.getName());
      vargs.add("1>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/AppMaster.stdout");
      vargs.add("2>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/AppMaster.stderr");

      // Get final command
      StringBuilder command = new StringBuilder(9 * vargs.size());
      for (CharSequence str : vargs) {
        command.append(str).append(" ");
      }

      LOG.info("Completed setting up app master command " + command.toString());
      List<String> commands = new ArrayList<String>();
      commands.add(command.toString());
      amContainer.setCommands(commands);

      // Set up resource type requirements
      // For now, only memory is supported so we set memory requirements
      Resource capability = Records.newRecord(Resource.class);
      capability.setMemory(amMemory);
      appContext.setResource(capability);

      // Service data is a binary blob that can be passed to the application
      // Not needed in this scenario
      // amContainer.setServiceData(serviceData);
      appContext.setAMContainerSpec(amContainer);

      // Set the priority for the application master
      Priority pri = Records.newRecord(Priority.class);
      pri.setPriority(amPriority);
      appContext.setPriority(pri);
      // Set the queue to which this application is to be submitted in the RM
      appContext.setQueue(queueName);

      // Submit the application to the applications manager
      // SubmitApplicationResponse submitResp = rmClient.submitApplication(appRequest);
      // Ignore the response as either a valid response object is returned on success
      // or an exception thrown to denote some form of a failure
      String specStr =
          Objects.toStringHelper("Submitting application: ")
              .add("name", appContext.getApplicationName())
              .add("queue", appContext.getQueue())
              .add("user", UserGroupInformation.getLoginUser())
              .add("resource", appContext.getResource())
              .toString();
      LOG.info(specStr);
      if (dag.isDebug()) {
        // LOG.info("Full submission context: " + appContext);
      }
      yarnClient.submitApplication(appContext);
    } finally {
      fs.close();
    }
  }
Beispiel #6
0
    private void parseMetaData() throws IOException {
      Text line = new Text();
      long read;
      FSDataInputStream in = null;
      LineReader lin = null;

      try {
        in = fs.open(masterIndexPath);
        FileStatus masterStat = fs.getFileStatus(masterIndexPath);
        masterIndexTimestamp = masterStat.getModificationTime();
        lin = new LineReader(in, getConf());
        read = lin.readLine(line);

        // the first line contains the version of the index file
        String versionLine = line.toString();
        String[] arr = versionLine.split(" ");
        version = Integer.parseInt(arr[0]);
        // make it always backwards-compatible
        if (this.version > HarFileSystem.VERSION) {
          throw new IOException(
              "Invalid version " + this.version + " expected " + HarFileSystem.VERSION);
        }

        // each line contains a hashcode range and the index file name
        String[] readStr;
        while (read < masterStat.getLen()) {
          int b = lin.readLine(line);
          read += b;
          readStr = line.toString().split(" ");
          int startHash = Integer.parseInt(readStr[0]);
          int endHash = Integer.parseInt(readStr[1]);
          stores.add(
              new Store(
                  Long.parseLong(readStr[2]), Long.parseLong(readStr[3]), startHash, endHash));
          line.clear();
        }
      } catch (IOException ioe) {
        LOG.warn("Encountered exception ", ioe);
        throw ioe;
      } finally {
        IOUtils.cleanup(LOG, lin, in);
      }

      FSDataInputStream aIn = fs.open(archiveIndexPath);
      try {
        FileStatus archiveStat = fs.getFileStatus(archiveIndexPath);
        archiveIndexTimestamp = archiveStat.getModificationTime();
        LineReader aLin;

        // now start reading the real index file
        for (Store s : stores) {
          read = 0;
          aIn.seek(s.begin);
          aLin = new LineReader(aIn, getConf());
          while (read + s.begin < s.end) {
            int tmp = aLin.readLine(line);
            read += tmp;
            String lineFeed = line.toString();
            String[] parsed = lineFeed.split(" ");
            parsed[0] = decodeFileName(parsed[0]);
            archive.put(new Path(parsed[0]), new HarStatus(lineFeed));
            line.clear();
          }
        }
      } finally {
        IOUtils.cleanup(LOG, aIn);
      }
    }
  /**
   * Returns the status of a given cache file on hdfs.
   *
   * @param conf configuration
   * @param cache cache file
   * @return FileStatus object of the file
   * @throws IOException
   */
  public static FileStatus getFileStatus(Configuration conf, URI cache) throws IOException {
    FileSystem fileSystem = FileSystem.get(cache, conf);
    Path filePath = new Path(cache.getPath());

    return fileSystem.getFileStatus(filePath);
  }
  /**
   * Returns mtime of a given cache file on hdfs.
   *
   * @param conf configuration
   * @param cache cache file
   * @return mtime of a given cache file on hdfs
   * @throws IOException
   */
  public static long getTimestamp(Configuration conf, URI cache) throws IOException {
    FileSystem fileSystem = FileSystem.get(cache, conf);
    Path filePath = new Path(cache.getPath());

    return fileSystem.getFileStatus(filePath).getModificationTime();
  }
  /**
   * Compare the checksums of the hdfs file as well as the local copied file.
   *
   * @author [email protected]
   * @date Fri Jan 27 06:06:00 2012
   */
  boolean compareChecksums(FileSystem fs, Path p, String sFsPath) {
    try {
      // get hdfs file info
      FileStatus stat = fs.getFileStatus(p);

      // get HDFS checksum
      FileChecksum ck = fs.getFileChecksum(p);
      String sCk, sCkShort;
      if (ck == null) {
        sCk = sCkShort = "<null>";
      } else {
        sCk = ck.toString();
        sCkShort = sCk.replaceAll("^.*:", "");
      }

      // System.out.println(p.toUri().getPath() + " len=" + stat.getLen()
      // + " " + stat.getOwner() + "/" + stat.getGroup()
      // + " checksum=" + sCk);

      // find the local file
      File fLocal = new File(sFsPath);
      if (!fLocal.exists()) {
        System.out.println("CHECKSUM-ERROR: file does not exist: " + sFsPath);
        return false;
      }
      if (!fLocal.isFile()) {
        System.out.println("CHECKSUM-ERROR: path is not a file: " + sFsPath);
        return false;
      }
      if (stat.getLen() != fLocal.length()) {
        System.out.println(
            "CHECKSUM-ERROR: length mismatch: "
                + sFsPath
                + " hdfslen="
                + stat.getLen()
                + " fslen="
                + fLocal.length());
        return false;
      }

      // get local fs checksum
      FileChecksum ckLocal = getLocalFileChecksum(sFsPath);
      if (ckLocal == null) {
        System.out.println("ERROR Failed to get checksum for local file " + sFsPath);
        return false;
      }

      // compare checksums as a string, after stripping the
      // algorithm name from the beginning
      String sCkLocal = ckLocal.toString();
      String sCkLocalShort = sCkLocal.replaceAll("^.*:", "");

      if (false == sCkShort.equals(sCkLocalShort)) {
        System.out.println(
            "CHECKSUM-ERROR: checksum mismatch: "
                + sFsPath
                + "\nhdfs = "
                + sCk
                + "\nlocal= "
                + sCkLocal);
        return false;
      }

      return true;
    } catch (IOException e) {
      System.out.println("CHECKSUM-ERROR: " + sFsPath + " exception " + e.toString());
    }

    return false;
  }
  /**
   * Method to go though the HDFS filesystem in a DFS to find all files
   *
   * <p>fs:FileSystem object from HDFS minDate: Oldest date for files to be backed up maxDate:Newest
   * date for files to be backed up p:Path in HDFS to look for files pathList:Will be filled with
   * all files in p hmTimestamps: hashmap of timestamps for later sorting
   */
  public void checkDir(
      FileSystem fs,
      long minDate,
      long maxDate,
      Path p,
      ArrayList<Path> pathList,
      HashMap<Path, Long> hmTimestamps) {
    long tmpDate;
    FileStatus[] fStat;

    try {
      String sPath = p.toUri().getPath();

      // If this is a directory
      if (fs.getFileStatus(p).isDir()) {
        // ignore certain directories
        if ("dfstmp".equals(p.getName())
            || "tmp".equals(p.getName())
            || "jobtracker".equals(p.getName())
            || sPath.startsWith("/mapred")
            || "ops".equals(p.getName())
            || p.getName().startsWith("_distcp_logs")) {
          return;
        }

        // dump the mkdir and chmod commands for this
        // directory -- skip root directory only
        {
          FileStatus stat = fs.getFileStatus(p);

          if (!sPath.equals("/")) {
            m_wrMkdirs.println("hadoop fs -mkdir " + sPath);
          }

          m_wrChmods.println(
              "hadoop fs -chown " + stat.getOwner() + ":" + stat.getGroup() + " " + sPath);

          Short sh = new Short(stat.getPermission().toShort());
          m_wrChmods.println(
              "hadoop fs -chmod " + Long.toOctalString(sh.longValue()) + " " + sPath);
        }

        fStat = fs.listStatus(p);

        // Do a recursive call to all elements
        for (int i = 0; i < fStat.length; i++) {
          checkDir(fs, minDate, maxDate, fStat[i].getPath(), pathList, hmTimestamps);
        }
      } else {
        // If not a directory then we've found a file

        // ignore crc files
        if (p.getName().endsWith(".crc")) {
          return;
        }

        // ignore other files
        if (sPath.startsWith("/user/oozie/etl/workflows/")) {
          return;
        }

        // try to get the table name from the path. There are
        // various types of tables, from those replicated from
        // another database to regular hive tables to
        // partitioned hive tables.  We use table names to
        // both exclude some from the backup, and for the rest
        // to dump out the schema and partition name.
        if (m_ignoreTables != null && m_ignoreTables.doIgnoreFile(sPath)) {
          m_nIgnoredTables++;

          if (m_nIgnoredTables < 5) {
            System.out.println("Skipping ignore-table file: " + sPath);
          } else if (m_nIgnoredTables == 5) {
            System.out.println("(...not showing other skipped tables...)");
          }
          return;
        }

        FileStatus stat = fs.getFileStatus(p);

        tmpDate = stat.getModificationTime() / 1000;

        // store the chmods/chowns for all files
        m_wrChmods.println(
            "hadoop fs -chown " + stat.getOwner() + ":" + stat.getGroup() + " " + sPath);

        m_wrChmods.println("hadoop fs -chmod " + stat.getPermission().toShort() + " " + sPath);

        // check dates.  is it too young?
        if (tmpDate < minDate) {
          return;
        }

        // is the file too recent?
        if (tmpDate > maxDate) {
          // System.out.println("file too recent: " + sPath);
          return;
        }

        // file timestamp is ok
        pathList.add(p);

        hmTimestamps.put(p, new Long(tmpDate));

        // store info about total bytes neeed to backup
        m_nTotalBytes += fs.getContentSummary(p).getLength();
      }
    } catch (IOException e) {
      System.err.println("ERROR: could not open " + p + ": " + e);

      // System.exit(1) ;
    }
  }
  /**
   * Method to move files from HDFS to local filesystem
   *
   * <p>localPath: Path on the machines filesystem fs:FileSystem object from HDFS pathList:List of
   * paths for files that might need to be backed up size:max size in bytes to be backed up
   *
   * <p>ReturnsDate of the last files backed up if reached size limit, else, zero
   */
  public long backupFiles(
      String localPath, String preservePath, FileSystem fs, ArrayList<Path> pathList, long size) {
    Path fsPath;
    long tmpSize = 0;
    long tmpDate = 0;

    // Start iterating over all paths
    for (Path hdfsPath : pathList) {
      try {
        long nFileSize = fs.getContentSummary(hdfsPath).getLength();
        tmpSize = tmpSize + nFileSize;

        if ((tmpSize <= size) || (size == 0)) {
          FileStatus stat = fs.getFileStatus(hdfsPath);

          System.err.println(
              "File "
                  + hdfsPath.toUri().getPath()
                  + " "
                  + nFileSize
                  + " bytes, "
                  + "perms: "
                  + stat.getOwner()
                  + "/"
                  + stat.getGroup()
                  + ", "
                  + stat.getPermission().toString());

          tmpDate = stat.getModificationTime() / 1000;

          String sFsPath = localPath + hdfsPath.toUri().getPath();
          fsPath = new Path(sFsPath);

          File f = new File(sFsPath);

          // COMMENTED OUT: until a few backup cycles run
          // and the mtime gets in fact set on all copied
          // files.
          //
          // ignore it if the file exists and has the same mtime
          // if (f.exists() && f.isFile() && f.lastModified() == stat.getModificationTime())
          // {
          // System.out.println("no need to backup " + f.toString() + ", mtime matches hdfs");
          // continue;
          // }

          if (false == m_bDryRun) {
            // check if we need to back up the local file
            // (not directory), if it already exists.
            if (f.exists() && f.isFile()) {
              // ignore files with substrings in the
              // no-preserve file
              if (true == doPreserveFile(sFsPath)) {
                // move it to the backup path
                String sNewPath = preservePath + hdfsPath.toUri().getPath();
                File newFile = new File(sNewPath);

                // create directory structure for new file?
                if (false == newFile.getParentFile().exists()) {
                  if (false == newFile.getParentFile().mkdirs()) {
                    System.err.println("Failed to mkdirs " + newFile.getParentFile().toString());
                    System.exit(1);
                  }
                }

                // rename existing file to new location
                if (false == f.renameTo(newFile)) {
                  System.err.println(
                      "Failed to renameTo " + f.toString() + " to " + newFile.toString());
                  System.exit(1);
                }

                System.out.println("preserved " + f.toString() + " into " + newFile.toString());
              } else {
                System.out.println("skipped preservation of " + f.toString());
              }
            }

            // copy from hdfs to local filesystem
            fs.copyToLocalFile(hdfsPath, fsPath);

            // set the mtime to match hdfs file
            f.setLastModified(stat.getModificationTime());

            // compare checksums on both files
            compareChecksums(fs, hdfsPath, sFsPath);
          }

          // don't print the progress after every file -- go
          // by at least 1% increments
          long nPercentDone = (long) (100 * tmpSize / m_nTotalBytes);
          if (nPercentDone > m_nLastPercentBytesDone) {
            System.out.println(
                "progress: copied "
                    + prettyPrintBytes(tmpSize)
                    + ", "
                    + nPercentDone
                    + "% done"
                    + ", tstamp="
                    + tmpDate);

            m_nLastPercentBytesDone = nPercentDone;
          }

          if (m_nSleepSeconds > 0) {
            try {
              Thread.sleep(1000 * m_nSleepSeconds);
            } catch (Exception e2) {
              // ignore
            }
          }
        } else {
          return tmpDate;
        }
      } catch (IOException e) {
        System.err.println("FATAL ERROR: Something wrong with the file");
        System.err.println(e);
        System.out.println(tmpDate);
        System.exit(1);

        return 0;
      }
    }

    return 0;
  }