Ejemplo n.º 1
0
  // Mostly for setting up the symlinks. Note that when we setup the distributed
  // cache, we didn't create the symlinks. This is done on a per task basis
  // by the currently executing task.
  public static void setupWorkDir(JobConf conf) throws IOException {
    File workDir = new File(".").getAbsoluteFile();
    FileUtil.fullyDelete(workDir);
    if (DistributedCache.getSymlink(conf)) {
      URI[] archives = DistributedCache.getCacheArchives(conf);
      URI[] files = DistributedCache.getCacheFiles(conf);
      Path[] localArchives = DistributedCache.getLocalCacheArchives(conf);
      Path[] localFiles = DistributedCache.getLocalCacheFiles(conf);
      if (archives != null) {
        for (int i = 0; i < archives.length; i++) {
          String link = archives[i].getFragment();
          if (link != null) {
            link = workDir.toString() + Path.SEPARATOR + link;
            File flink = new File(link);
            if (!flink.exists()) {
              FileUtil.symLink(localArchives[i].toString(), link);
            }
          }
        }
      }
      if (files != null) {
        for (int i = 0; i < files.length; i++) {
          String link = files[i].getFragment();
          if (link != null) {
            link = workDir.toString() + Path.SEPARATOR + link;
            File flink = new File(link);
            if (!flink.exists()) {
              FileUtil.symLink(localFiles[i].toString(), link);
            }
          }
        }
      }
    }
    File jobCacheDir = null;
    if (conf.getJar() != null) {
      jobCacheDir = new File(new Path(conf.getJar()).getParent().toString());
    }

    // create symlinks for all the files in job cache dir in current
    // workingdir for streaming
    try {
      DistributedCache.createAllSymlink(conf, jobCacheDir, workDir);
    } catch (IOException ie) {
      // Do not exit even if symlinks have not been created.
      LOG.warn(StringUtils.stringifyException(ie));
    }
    // add java.io.tmpdir given by mapred.child.tmp
    String tmp = conf.get("mapred.child.tmp", "./tmp");
    Path tmpDir = new Path(tmp);

    // if temp directory path is not absolute
    // prepend it with workDir.
    if (!tmpDir.isAbsolute()) {
      tmpDir = new Path(workDir.toString(), tmp);
      FileSystem localFs = FileSystem.getLocal(conf);
      if (!localFs.mkdirs(tmpDir) && !localFs.getFileStatus(tmpDir).isDir()) {
        throw new IOException("Mkdirs failed to create " + tmpDir.toString());
      }
    }
  }
Ejemplo n.º 2
0
 private static void createSymlink(
     Configuration conf,
     URI cache,
     CacheStatus cacheStatus,
     boolean isArchive,
     Path currentWorkDir,
     boolean honorSymLinkConf)
     throws IOException {
   boolean doSymlink = honorSymLinkConf && DistributedCache.getSymlink(conf);
   if (cache.getFragment() == null) {
     doSymlink = false;
   }
   String link = currentWorkDir.toString() + Path.SEPARATOR + cache.getFragment();
   File flink = new File(link);
   if (doSymlink) {
     if (!flink.exists()) {
       FileUtil.symLink(cacheStatus.localizedLoadPath.toString(), link);
     }
   }
 }