List of usage examples for org.apache.hadoop.yarn.util FSDownload FSDownload
public FSDownload(FileContext files, UserGroupInformation ugi, Configuration conf, Path destDirPath,
LocalResource resource)
From source file:com.scaleoutsoftware.soss.hserver.hadoop.DistributedCacheManager.java
License:Apache License
/** * Set up the distributed cache by localizing the resources, and updating * the configuration with references to the localized resources. * @param conf job configuration//from w ww . j a v a 2 s . c o m * @throws IOException */ public void setup(Configuration conf) throws IOException { //If we are not 0th worker, wait for 0th worker to set up the cache if (InvocationWorker.getIgWorkerIndex() > 0 && InvocationWorker.getNumberOfWorkers() > 1) { try { InvocationWorker.getSynchronizationBarrier().waitForComplete(ACTION_NAME, SYNCHRONIZATION_WAIT_MS, WAIT_GRANULARITY_MS); } catch (Exception e) { throw new RuntimeException(e); } return; } File workDir = new File(System.getProperty("user.dir")); // Generate YARN local resources objects corresponding to the distributed // cache configuration Map<String, LocalResource> localResources = new LinkedHashMap<String, LocalResource>(); MRApps.setupDistributedCache(conf, localResources); //CODE CHANGE FROM ORIGINAL FILE: //We need to clear the resources from jar files, since they are distributed through the IG. // Iterator<Map.Entry<String, LocalResource>> iterator = localResources.entrySet().iterator(); while (iterator.hasNext()) { Entry<String, LocalResource> entry = iterator.next(); if (entry.getKey().endsWith(".jar")) { iterator.remove(); } } // Generating unique numbers for FSDownload. AtomicLong uniqueNumberGenerator = new AtomicLong(System.currentTimeMillis()); // Find which resources are to be put on the local classpath Map<String, Path> classpaths = new HashMap<String, Path>(); Path[] archiveClassPaths = DistributedCache.getArchiveClassPaths(conf); if (archiveClassPaths != null) { for (Path p : archiveClassPaths) { FileSystem remoteFS = p.getFileSystem(conf); p = remoteFS.resolvePath(p.makeQualified(remoteFS.getUri(), remoteFS.getWorkingDirectory())); classpaths.put(p.toUri().getPath().toString(), p); } } Path[] fileClassPaths = DistributedCache.getFileClassPaths(conf); if (fileClassPaths != null) { for (Path p : fileClassPaths) { FileSystem remoteFS = p.getFileSystem(conf); p = remoteFS.resolvePath(p.makeQualified(remoteFS.getUri(), remoteFS.getWorkingDirectory())); classpaths.put(p.toUri().getPath().toString(), p); } } // Localize the resources LocalDirAllocator localDirAllocator = new LocalDirAllocator(MRConfig.LOCAL_DIR); FileContext localFSFileContext = FileContext.getLocalFSFileContext(); UserGroupInformation ugi = UserGroupInformation.getCurrentUser(); ExecutorService exec = null; try { ThreadFactory tf = new ThreadFactoryBuilder() .setNameFormat("LocalDistributedCacheManager Downloader #%d").build(); exec = Executors.newCachedThreadPool(tf); Path destPath = localDirAllocator.getLocalPathForWrite(".", conf); Map<LocalResource, Future<Path>> resourcesToPaths = Maps.newHashMap(); for (LocalResource resource : localResources.values()) { Callable<Path> download = new FSDownload(localFSFileContext, ugi, conf, new Path(destPath, Long.toString(uniqueNumberGenerator.incrementAndGet())), resource); Future<Path> future = exec.submit(download); resourcesToPaths.put(resource, future); } for (Entry<String, LocalResource> entry : localResources.entrySet()) { LocalResource resource = entry.getValue(); Path path; try { path = resourcesToPaths.get(resource).get(); } catch (InterruptedException e) { throw new IOException(e); } catch (ExecutionException e) { throw new IOException(e); } String pathString = path.toUri().toString(); String link = entry.getKey(); String target = new File(path.toUri()).getPath(); symlink(workDir, target, link); if (resource.getType() == LocalResourceType.ARCHIVE) { localArchives.add(pathString); } else if (resource.getType() == LocalResourceType.FILE) { localFiles.add(pathString); } else if (resource.getType() == LocalResourceType.PATTERN) { //PATTERN is not currently used in local mode throw new IllegalArgumentException( "Resource type PATTERN is not " + "implemented yet. " + resource.getResource()); } Path resourcePath; try { resourcePath = ConverterUtils.getPathFromYarnURL(resource.getResource()); } catch (URISyntaxException e) { throw new IOException(e); } LOG.info(String.format("Localized %s as %s", resourcePath, path)); String cp = resourcePath.toUri().getPath(); if (classpaths.keySet().contains(cp)) { localClasspaths.add(path.toUri().getPath().toString()); } } } finally { if (exec != null) { exec.shutdown(); } } // Update the configuration object with localized data. if (!localArchives.isEmpty()) { conf.set(MRJobConfig.CACHE_LOCALARCHIVES, StringUtils.arrayToString(localArchives.toArray(new String[localArchives.size()]))); } if (!localFiles.isEmpty()) { conf.set(MRJobConfig.CACHE_LOCALFILES, StringUtils.arrayToString(localFiles.toArray(new String[localArchives.size()]))); } setupCalled = true; //If we are 0th worker, signal action complete if (InvocationWorker.getIgWorkerIndex() == 0 && InvocationWorker.getNumberOfWorkers() > 1) { try { InvocationWorker.getSynchronizationBarrier().signalComplete(ACTION_NAME); } catch (Exception e) { throw new RuntimeException(e); } } }
From source file:org.apache.tez.dag.app.launcher.TezLocalCacheManager.java
License:Apache License
/** * Localize this instance's resources by downloading and symlinking them. * * @throws IOException when an error occurs in download or link *//*w w w . j av a 2 s . co m*/ public void localize() throws IOException { String absPath = Paths.get(".").toAbsolutePath().normalize().toString(); Path cwd = fileContext.makeQualified(new Path(absPath)); ExecutorService threadPool = null; try { // construct new threads with helpful names ThreadFactory threadFactory = new ThreadFactoryBuilder() .setNameFormat("TezLocalCacheManager Downloader #%d").build(); threadPool = Executors.newCachedThreadPool(threadFactory); // start all fetches for (Map.Entry<String, LocalResource> entry : resources.entrySet()) { String resourceName = entry.getKey(); LocalResource resource = entry.getValue(); if (resource.getType() == LocalResourceType.PATTERN) { throw new IllegalArgumentException("Resource type PATTERN not supported."); } // linkPath is the path we want to symlink the file/directory into Path linkPath = new Path(cwd, entry.getKey()); if (resourceInfo.containsKey(resource)) { // We've already downloaded this resource and just need to add another link. resourceInfo.get(resource).linkPaths.add(linkPath); } else { // submit task to download the object java.nio.file.Path downloadDir = Files.createTempDirectory(tempDir, resourceName); Path dest = new Path(downloadDir.toAbsolutePath().toString()); FSDownload downloader = new FSDownload(fileContext, ugi, conf, dest, resource); Future<Path> downloadedPath = threadPool.submit(downloader); resourceInfo.put(resource, new ResourceInfo(downloadedPath, linkPath)); } } // Link each file for (Map.Entry<LocalResource, ResourceInfo> entry : resourceInfo.entrySet()) { LocalResource resource = entry.getKey(); ResourceInfo resourceMeta = entry.getValue(); for (Path linkPath : resourceMeta.linkPaths) { Path targetPath; try { // this blocks on the download completing targetPath = resourceMeta.downloadPath.get(); } catch (InterruptedException | ExecutionException e) { throw new IOException(e); } if (createSymlink(targetPath, linkPath)) { LOG.info("Localized file: {} as {}", resource, linkPath); } else { LOG.warn("Failed to create symlink: {} <- {}", targetPath, linkPath); } } } } finally { if (threadPool != null) { threadPool.shutdownNow(); } } }