Java Code Examples for org.apache.hadoop.hdfs.util.MD5FileUtils#saveMD5File()

The following examples show how to use org.apache.hadoop.hdfs.util.MD5FileUtils#saveMD5File() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: hadoop   File: TestStartup.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * Corrupts the MD5 sum of the fsimage.
 * 
 * @param corruptAll
 *          whether to corrupt one or all of the MD5 sums in the configured
 *          namedirs
 * @throws IOException
 */
private void corruptFSImageMD5(boolean corruptAll) throws IOException {
  List<URI> nameDirs = (List<URI>)FSNamesystem.getNamespaceDirs(config);
  // Corrupt the md5 files in all the namedirs
  for (URI uri: nameDirs) {
    // Directory layout looks like:
    // test/data/dfs/nameN/current/{fsimage,edits,...}
    File nameDir = new File(uri.getPath());
    File dfsDir = nameDir.getParentFile();
    assertEquals(dfsDir.getName(), "dfs"); // make sure we got right dir
    // Set the md5 file to all zeros
    File imageFile = new File(nameDir,
        Storage.STORAGE_DIR_CURRENT + "/"
        + NNStorage.getImageFileName(0));
    MD5FileUtils.saveMD5File(imageFile, new MD5Hash(new byte[16]));
    // Only need to corrupt one if !corruptAll
    if (!corruptAll) {
      break;
    }
  }
}
 
Example 2
Source Project: big-c   File: TestStartup.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * Corrupts the MD5 sum of the fsimage.
 * 
 * @param corruptAll
 *          whether to corrupt one or all of the MD5 sums in the configured
 *          namedirs
 * @throws IOException
 */
private void corruptFSImageMD5(boolean corruptAll) throws IOException {
  List<URI> nameDirs = (List<URI>)FSNamesystem.getNamespaceDirs(config);
  // Corrupt the md5 files in all the namedirs
  for (URI uri: nameDirs) {
    // Directory layout looks like:
    // test/data/dfs/nameN/current/{fsimage,edits,...}
    File nameDir = new File(uri.getPath());
    File dfsDir = nameDir.getParentFile();
    assertEquals(dfsDir.getName(), "dfs"); // make sure we got right dir
    // Set the md5 file to all zeros
    File imageFile = new File(nameDir,
        Storage.STORAGE_DIR_CURRENT + "/"
        + NNStorage.getImageFileName(0));
    MD5FileUtils.saveMD5File(imageFile, new MD5Hash(new byte[16]));
    // Only need to corrupt one if !corruptAll
    if (!corruptAll) {
      break;
    }
  }
}
 
Example 3
Source Project: hadoop   File: FSImage.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Save the contents of the FS image to the file.
 */
void saveFSImage(SaveNamespaceContext context, StorageDirectory sd,
    NameNodeFile dstType) throws IOException {
  long txid = context.getTxId();
  File newFile = NNStorage.getStorageFile(sd, NameNodeFile.IMAGE_NEW, txid);
  File dstFile = NNStorage.getStorageFile(sd, dstType, txid);
  
  FSImageFormatProtobuf.Saver saver = new FSImageFormatProtobuf.Saver(context);
  FSImageCompression compression = FSImageCompression.createCompression(conf);
  saver.save(newFile, compression);
  
  MD5FileUtils.saveMD5File(dstFile, saver.getSavedDigest());
  storage.setMostRecentCheckpointInfo(txid, Time.now());
}
 
Example 4
Source Project: hadoop   File: FSImage.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * This is called by the 2NN after having downloaded an image, and by
 * the NN after having received a new image from the 2NN. It
 * renames the image from fsimage_N.ckpt to fsimage_N and also
 * saves the related .md5 file into place.
 */
public synchronized void saveDigestAndRenameCheckpointImage(NameNodeFile nnf,
    long txid, MD5Hash digest) throws IOException {
  // Write and rename MD5 file
  List<StorageDirectory> badSds = Lists.newArrayList();
  
  for (StorageDirectory sd : storage.dirIterable(NameNodeDirType.IMAGE)) {
    File imageFile = NNStorage.getImageFile(sd, nnf, txid);
    try {
      MD5FileUtils.saveMD5File(imageFile, digest);
    } catch (IOException ioe) {
      badSds.add(sd);
    }
  }
  storage.reportErrorsOnDirectories(badSds);
  
  CheckpointFaultInjector.getInstance().afterMD5Rename();
  
  // Rename image from tmp file
  renameCheckpoint(txid, NameNodeFile.IMAGE_NEW, nnf, false);
  // So long as this is the newest image available,
  // advertise it as such to other checkpointers
  // from now on
  if (txid > storage.getMostRecentCheckpointTxId()) {
    storage.setMostRecentCheckpointInfo(txid, Time.now());
  }
}
 
Example 5
Source Project: big-c   File: FSImage.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Save the contents of the FS image to the file.
 */
void saveFSImage(SaveNamespaceContext context, StorageDirectory sd,
    NameNodeFile dstType) throws IOException {
  long txid = context.getTxId();
  File newFile = NNStorage.getStorageFile(sd, NameNodeFile.IMAGE_NEW, txid);
  File dstFile = NNStorage.getStorageFile(sd, dstType, txid);
  
  FSImageFormatProtobuf.Saver saver = new FSImageFormatProtobuf.Saver(context);
  FSImageCompression compression = FSImageCompression.createCompression(conf);
  saver.save(newFile, compression);
  
  MD5FileUtils.saveMD5File(dstFile, saver.getSavedDigest());
  storage.setMostRecentCheckpointInfo(txid, Time.now());
}
 
Example 6
Source Project: big-c   File: FSImage.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * This is called by the 2NN after having downloaded an image, and by
 * the NN after having received a new image from the 2NN. It
 * renames the image from fsimage_N.ckpt to fsimage_N and also
 * saves the related .md5 file into place.
 */
public synchronized void saveDigestAndRenameCheckpointImage(NameNodeFile nnf,
    long txid, MD5Hash digest) throws IOException {
  // Write and rename MD5 file
  List<StorageDirectory> badSds = Lists.newArrayList();
  
  for (StorageDirectory sd : storage.dirIterable(NameNodeDirType.IMAGE)) {
    File imageFile = NNStorage.getImageFile(sd, nnf, txid);
    try {
      MD5FileUtils.saveMD5File(imageFile, digest);
    } catch (IOException ioe) {
      badSds.add(sd);
    }
  }
  storage.reportErrorsOnDirectories(badSds);
  
  CheckpointFaultInjector.getInstance().afterMD5Rename();
  
  // Rename image from tmp file
  renameCheckpoint(txid, NameNodeFile.IMAGE_NEW, nnf, false);
  // So long as this is the newest image available,
  // advertise it as such to other checkpointers
  // from now on
  if (txid > storage.getMostRecentCheckpointTxId()) {
    storage.setMostRecentCheckpointInfo(txid, Time.now());
  }
}