Java Code Examples for org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory#getRoot()

The following examples show how to use org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory#getRoot() . 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 File: FSImage.java    From hadoop with Apache License 2.0 5 votes vote down vote up 
/** Check if upgrade is in progress. */
public static void checkUpgrade(NNStorage storage) throws IOException {
  // Upgrade or rolling upgrade is allowed only if there are 
  // no previous fs states in any of the directories
  for (Iterator<StorageDirectory> it = storage.dirIterator(false); it.hasNext();) {
    StorageDirectory sd = it.next();
    if (sd.getPreviousDir().exists())
      throw new InconsistentFSStateException(sd.getRoot(),
          "previous fs state should not exist during upgrade. "
          + "Finalize or rollback first.");
  }
}
Example 2
Source File: FSImage.java    From hadoop with Apache License 2.0 5 votes vote down vote up 
void loadFSImageFile(FSNamesystem target, MetaRecoveryContext recovery,
    FSImageFile imageFile, StartupOption startupOption) throws IOException {
  LOG.debug("Planning to load image :\n" + imageFile);
  StorageDirectory sdForProperties = imageFile.sd;
  storage.readProperties(sdForProperties, startupOption);

  if (NameNodeLayoutVersion.supports(
      LayoutVersion.Feature.TXID_BASED_LAYOUT, getLayoutVersion())) {
    // For txid-based layout, we should have a .md5 file
    // next to the image file
    boolean isRollingRollback = RollingUpgradeStartupOption.ROLLBACK
        .matches(startupOption);
    loadFSImage(imageFile.getFile(), target, recovery, isRollingRollback);
  } else if (NameNodeLayoutVersion.supports(
      LayoutVersion.Feature.FSIMAGE_CHECKSUM, getLayoutVersion())) {
    // In 0.22, we have the checksum stored in the VERSION file.
    String md5 = storage.getDeprecatedProperty(
        NNStorage.DEPRECATED_MESSAGE_DIGEST_PROPERTY);
    if (md5 == null) {
      throw new InconsistentFSStateException(sdForProperties.getRoot(),
          "Message digest property " +
          NNStorage.DEPRECATED_MESSAGE_DIGEST_PROPERTY +
          " not set for storage directory " + sdForProperties.getRoot());
    }
    loadFSImage(imageFile.getFile(), new MD5Hash(md5), target, recovery,
        false);
  } else {
    // We don't have any record of the md5sum
    loadFSImage(imageFile.getFile(), null, target, recovery, false);
  }
}
Example 3
Source File: BackupImage.java    From hadoop with Apache License 2.0 5 votes vote down vote up 
/**
 * Analyze backup storage directories for consistency.<br>
 * Recover from incomplete checkpoints if required.<br>
 * Read VERSION and fstime files if exist.<br>
 * Do not load image or edits.
 *
 * @throws IOException if the node should shutdown.
 */
void recoverCreateRead() throws IOException {
  for (Iterator<StorageDirectory> it = storage.dirIterator(); it.hasNext();) {
    StorageDirectory sd = it.next();
    StorageState curState;
    try {
      curState = sd.analyzeStorage(HdfsServerConstants.StartupOption.REGULAR, storage);
      // sd is locked but not opened
      switch(curState) {
      case NON_EXISTENT:
        // fail if any of the configured storage dirs are inaccessible
        throw new InconsistentFSStateException(sd.getRoot(),
              "checkpoint directory does not exist or is not accessible.");
      case NOT_FORMATTED:
        // for backup node all directories may be unformatted initially
        LOG.info("Storage directory " + sd.getRoot() + " is not formatted.");
        LOG.info("Formatting ...");
        sd.clearDirectory(); // create empty current
        break;
      case NORMAL:
        break;
      default:  // recovery is possible
        sd.doRecover(curState);
      }
      if(curState != StorageState.NOT_FORMATTED) {
        // read and verify consistency with other directories
        storage.readProperties(sd);
      }
    } catch(IOException ioe) {
      sd.unlock();
      throw ioe;
    }
  }
}
Example 4
Source File: StorageInfo.java    From hadoop with Apache License 2.0 5 votes vote down vote up 
/** Validate and set clusterId from {@link Properties}*/
protected void setClusterId(Properties props, int layoutVersion,
    StorageDirectory sd) throws InconsistentFSStateException {
  // Set cluster ID in version that supports federation
  if (LayoutVersion.supports(getServiceLayoutFeatureMap(),
      Feature.FEDERATION, layoutVersion)) {
    String cid = getProperty(props, sd, "clusterID");
    if (!(clusterID.equals("") || cid.equals("") || clusterID.equals(cid))) {
      throw new InconsistentFSStateException(sd.getRoot(),
          "cluster Id is incompatible with others.");
    }
    clusterID = cid;
  }
}
Example 5
Source File: TestJournal.java    From hadoop with Apache License 2.0 5 votes vote down vote up 
@Test (timeout = 10000)
public void testJournalLocking() throws Exception {
  Assume.assumeTrue(journal.getStorage().getStorageDir(0).isLockSupported());
  StorageDirectory sd = journal.getStorage().getStorageDir(0);
  File lockFile = new File(sd.getRoot(), Storage.STORAGE_FILE_LOCK);
  
  // Journal should be locked, since the format() call locks it.
  GenericTestUtils.assertExists(lockFile);

  journal.newEpoch(FAKE_NSINFO,  1);
  try {
    new Journal(conf, TEST_LOG_DIR, JID, StartupOption.REGULAR,
        mockErrorReporter);
    fail("Did not fail to create another journal in same dir");
  } catch (IOException ioe) {
    GenericTestUtils.assertExceptionContains(
        "Cannot lock storage", ioe);
  }
  
  journal.close();
  
  // Journal should no longer be locked after the close() call.
  // Hence, should be able to create a new Journal in the same dir.
  Journal journal2 = new Journal(conf, TEST_LOG_DIR, JID,
      StartupOption.REGULAR, mockErrorReporter);
  journal2.newEpoch(FAKE_NSINFO, 2);
  journal2.close();
}
Example 6
Source File: FSImage.java    From big-c with Apache License 2.0 5 votes vote down vote up 
/** Check if upgrade is in progress. */
public static void checkUpgrade(NNStorage storage) throws IOException {
  // Upgrade or rolling upgrade is allowed only if there are 
  // no previous fs states in any of the directories
  for (Iterator<StorageDirectory> it = storage.dirIterator(false); it.hasNext();) {
    StorageDirectory sd = it.next();
    if (sd.getPreviousDir().exists())
      throw new InconsistentFSStateException(sd.getRoot(),
          "previous fs state should not exist during upgrade. "
          + "Finalize or rollback first.");
  }
}
Example 7
Source File: FSImage.java    From big-c with Apache License 2.0 5 votes vote down vote up 
void loadFSImageFile(FSNamesystem target, MetaRecoveryContext recovery,
    FSImageFile imageFile, StartupOption startupOption) throws IOException {
  LOG.debug("Planning to load image :\n" + imageFile);
  StorageDirectory sdForProperties = imageFile.sd;
  storage.readProperties(sdForProperties, startupOption);

  if (NameNodeLayoutVersion.supports(
      LayoutVersion.Feature.TXID_BASED_LAYOUT, getLayoutVersion())) {
    // For txid-based layout, we should have a .md5 file
    // next to the image file
    boolean isRollingRollback = RollingUpgradeStartupOption.ROLLBACK
        .matches(startupOption);
    loadFSImage(imageFile.getFile(), target, recovery, isRollingRollback);
  } else if (NameNodeLayoutVersion.supports(
      LayoutVersion.Feature.FSIMAGE_CHECKSUM, getLayoutVersion())) {
    // In 0.22, we have the checksum stored in the VERSION file.
    String md5 = storage.getDeprecatedProperty(
        NNStorage.DEPRECATED_MESSAGE_DIGEST_PROPERTY);
    if (md5 == null) {
      throw new InconsistentFSStateException(sdForProperties.getRoot(),
          "Message digest property " +
          NNStorage.DEPRECATED_MESSAGE_DIGEST_PROPERTY +
          " not set for storage directory " + sdForProperties.getRoot());
    }
    loadFSImage(imageFile.getFile(), new MD5Hash(md5), target, recovery,
        false);
  } else {
    // We don't have any record of the md5sum
    loadFSImage(imageFile.getFile(), null, target, recovery, false);
  }
}
Example 8
Source File: BackupImage.java    From big-c with Apache License 2.0 5 votes vote down vote up 
/**
 * Analyze backup storage directories for consistency.<br>
 * Recover from incomplete checkpoints if required.<br>
 * Read VERSION and fstime files if exist.<br>
 * Do not load image or edits.
 *
 * @throws IOException if the node should shutdown.
 */
void recoverCreateRead() throws IOException {
  for (Iterator<StorageDirectory> it = storage.dirIterator(); it.hasNext();) {
    StorageDirectory sd = it.next();
    StorageState curState;
    try {
      curState = sd.analyzeStorage(HdfsServerConstants.StartupOption.REGULAR, storage);
      // sd is locked but not opened
      switch(curState) {
      case NON_EXISTENT:
        // fail if any of the configured storage dirs are inaccessible
        throw new InconsistentFSStateException(sd.getRoot(),
              "checkpoint directory does not exist or is not accessible.");
      case NOT_FORMATTED:
        // for backup node all directories may be unformatted initially
        LOG.info("Storage directory " + sd.getRoot() + " is not formatted.");
        LOG.info("Formatting ...");
        sd.clearDirectory(); // create empty current
        break;
      case NORMAL:
        break;
      default:  // recovery is possible
        sd.doRecover(curState);
      }
      if(curState != StorageState.NOT_FORMATTED) {
        // read and verify consistency with other directories
        storage.readProperties(sd);
      }
    } catch(IOException ioe) {
      sd.unlock();
      throw ioe;
    }
  }
}
Example 9
Source File: StorageInfo.java    From big-c with Apache License 2.0 5 votes vote down vote up 
/** Validate and set clusterId from {@link Properties}*/
protected void setClusterId(Properties props, int layoutVersion,
    StorageDirectory sd) throws InconsistentFSStateException {
  // Set cluster ID in version that supports federation
  if (LayoutVersion.supports(getServiceLayoutFeatureMap(),
      Feature.FEDERATION, layoutVersion)) {
    String cid = getProperty(props, sd, "clusterID");
    if (!(clusterID.equals("") || cid.equals("") || clusterID.equals(cid))) {
      throw new InconsistentFSStateException(sd.getRoot(),
          "cluster Id is incompatible with others.");
    }
    clusterID = cid;
  }
}
Example 10
Source File: TestJournal.java    From big-c with Apache License 2.0 5 votes vote down vote up 
@Test (timeout = 10000)
public void testJournalLocking() throws Exception {
  Assume.assumeTrue(journal.getStorage().getStorageDir(0).isLockSupported());
  StorageDirectory sd = journal.getStorage().getStorageDir(0);
  File lockFile = new File(sd.getRoot(), Storage.STORAGE_FILE_LOCK);
  
  // Journal should be locked, since the format() call locks it.
  GenericTestUtils.assertExists(lockFile);

  journal.newEpoch(FAKE_NSINFO,  1);
  try {
    new Journal(conf, TEST_LOG_DIR, JID, StartupOption.REGULAR,
        mockErrorReporter);
    fail("Did not fail to create another journal in same dir");
  } catch (IOException ioe) {
    GenericTestUtils.assertExceptionContains(
        "Cannot lock storage", ioe);
  }
  
  journal.close();
  
  // Journal should no longer be locked after the close() call.
  // Hence, should be able to create a new Journal in the same dir.
  Journal journal2 = new Journal(conf, TEST_LOG_DIR, JID,
      StartupOption.REGULAR, mockErrorReporter);
  journal2.newEpoch(FAKE_NSINFO, 2);
  journal2.close();
}
Example 11
Source File: NameSpaceSliceStorage.java    From RDFS with Apache License 2.0 5 votes vote down vote up 
@Override
protected void getFields(Properties props, StorageDirectory sd)
    throws IOException {
  setNamespaceID(props, sd);
  setcTime(props, sd);
  
  String snsid = props.getProperty(NAMESPACE_ID);
  setNameSpaceID(sd.getRoot(), snsid);

  String property = props.getProperty(LAYOUT_VERSION);
  int lv;
  if (property == null) {
    Integer topLayout = getTopLevelLayout(sd);
    if (topLayout == null) {
      throw new InconsistentFSStateException(sd.getRoot(),
          "Top level layout and NS level layout do not exist");
    }
    lv = topLayout;
  } else {
    lv = Integer.parseInt(property);
  }
  if (lv < FSConstants.LAYOUT_VERSION) { // future version
    throw new InconsistentFSStateException(sd.getRoot(),
        "has future layout version : " + lv);
  }
  layoutVersion = lv;
}
Example 12
Source File: FSImage.java    From hadoop with Apache License 2.0 4 votes vote down vote up 
/**
 * For each storage directory, performs recovery of incomplete transitions
 * (eg. upgrade, rollback, checkpoint) and inserts the directory's storage
 * state into the dataDirStates map.
 * @param dataDirStates output of storage directory states
 * @return true if there is at least one valid formatted storage directory
 */
public static boolean recoverStorageDirs(StartupOption startOpt,
    NNStorage storage, Map<StorageDirectory, StorageState> dataDirStates)
    throws IOException {
  boolean isFormatted = false;
  // This loop needs to be over all storage dirs, even shared dirs, to make
  // sure that we properly examine their state, but we make sure we don't
  // mutate the shared dir below in the actual loop.
  for (Iterator<StorageDirectory> it = 
                    storage.dirIterator(); it.hasNext();) {
    StorageDirectory sd = it.next();
    StorageState curState;
    if (startOpt == StartupOption.METADATAVERSION) {
      /* All we need is the layout version. */
      storage.readProperties(sd);
      return true;
    }

    try {
      curState = sd.analyzeStorage(startOpt, storage);
      // sd is locked but not opened
      switch(curState) {
      case NON_EXISTENT:
        // name-node fails if any of the configured storage dirs are missing
        throw new InconsistentFSStateException(sd.getRoot(),
                    "storage directory does not exist or is not accessible.");
      case NOT_FORMATTED:
        break;
      case NORMAL:
        break;
      default:  // recovery is possible
        sd.doRecover(curState);
      }
      if (curState != StorageState.NOT_FORMATTED 
          && startOpt != StartupOption.ROLLBACK) {
        // read and verify consistency with other directories
        storage.readProperties(sd, startOpt);
        isFormatted = true;
      }
      if (startOpt == StartupOption.IMPORT && isFormatted)
        // import of a checkpoint is allowed only into empty image directories
        throw new IOException("Cannot import image from a checkpoint. " 
            + " NameNode already contains an image in " + sd.getRoot());
    } catch (IOException ioe) {
      sd.unlock();
      throw ioe;
    }
    dataDirStates.put(sd,curState);
  }
  return isFormatted;
}
Example 13
Source File: SecondaryNameNode.java    From hadoop with Apache License 2.0 4 votes vote down vote up 
/**
 * Analyze checkpoint directories.
 * Create directories if they do not exist.
 * Recover from an unsuccessful checkpoint if necessary.
 *
 * @throws IOException
 */
void recoverCreate(boolean format) throws IOException {
  storage.attemptRestoreRemovedStorage();
  storage.unlockAll();

  for (Iterator<StorageDirectory> it = 
               storage.dirIterator(); it.hasNext();) {
    StorageDirectory sd = it.next();
    boolean isAccessible = true;
    try { // create directories if don't exist yet
      if(!sd.getRoot().mkdirs()) {
        // do nothing, directory is already created
      }
    } catch(SecurityException se) {
      isAccessible = false;
    }
    if(!isAccessible)
      throw new InconsistentFSStateException(sd.getRoot(),
          "cannot access checkpoint directory.");
    
    if (format) {
      // Don't confirm, since this is just the secondary namenode.
      LOG.info("Formatting storage directory " + sd);
      sd.clearDirectory();
    }
    
    StorageState curState;
    try {
      curState = sd.analyzeStorage(HdfsServerConstants.StartupOption.REGULAR, storage);
      // sd is locked but not opened
      switch(curState) {
      case NON_EXISTENT:
        // fail if any of the configured checkpoint dirs are inaccessible 
        throw new InconsistentFSStateException(sd.getRoot(),
              "checkpoint directory does not exist or is not accessible.");
      case NOT_FORMATTED:
        break;  // it's ok since initially there is no current and VERSION
      case NORMAL:
        // Read the VERSION file. This verifies that:
        // (a) the VERSION file for each of the directories is the same,
        // and (b) when we connect to a NN, we can verify that the remote
        // node matches the same namespace that we ran on previously.
        storage.readProperties(sd);
        break;
      default:  // recovery is possible
        sd.doRecover(curState);
      }
    } catch (IOException ioe) {
      sd.unlock();
      throw ioe;
    }
  }
}
Example 14
Source File: FSImage.java    From big-c with Apache License 2.0 4 votes vote down vote up 
/**
 * For each storage directory, performs recovery of incomplete transitions
 * (eg. upgrade, rollback, checkpoint) and inserts the directory's storage
 * state into the dataDirStates map.
 * @param dataDirStates output of storage directory states
 * @return true if there is at least one valid formatted storage directory
 */
public static boolean recoverStorageDirs(StartupOption startOpt,
    NNStorage storage, Map<StorageDirectory, StorageState> dataDirStates)
    throws IOException {
  boolean isFormatted = false;
  // This loop needs to be over all storage dirs, even shared dirs, to make
  // sure that we properly examine their state, but we make sure we don't
  // mutate the shared dir below in the actual loop.
  for (Iterator<StorageDirectory> it = 
                    storage.dirIterator(); it.hasNext();) {
    StorageDirectory sd = it.next();
    StorageState curState;
    if (startOpt == StartupOption.METADATAVERSION) {
      /* All we need is the layout version. */
      storage.readProperties(sd);
      return true;
    }

    try {
      curState = sd.analyzeStorage(startOpt, storage);
      // sd is locked but not opened
      switch(curState) {
      case NON_EXISTENT:
        // name-node fails if any of the configured storage dirs are missing
        throw new InconsistentFSStateException(sd.getRoot(),
                    "storage directory does not exist or is not accessible.");
      case NOT_FORMATTED:
        break;
      case NORMAL:
        break;
      default:  // recovery is possible
        sd.doRecover(curState);
      }
      if (curState != StorageState.NOT_FORMATTED 
          && startOpt != StartupOption.ROLLBACK) {
        // read and verify consistency with other directories
        storage.readProperties(sd, startOpt);
        isFormatted = true;
      }
      if (startOpt == StartupOption.IMPORT && isFormatted)
        // import of a checkpoint is allowed only into empty image directories
        throw new IOException("Cannot import image from a checkpoint. " 
            + " NameNode already contains an image in " + sd.getRoot());
    } catch (IOException ioe) {
      sd.unlock();
      throw ioe;
    }
    dataDirStates.put(sd,curState);
  }
  return isFormatted;
}
Example 15
Source File: SecondaryNameNode.java    From big-c with Apache License 2.0 4 votes vote down vote up 
/**
 * Analyze checkpoint directories.
 * Create directories if they do not exist.
 * Recover from an unsuccessful checkpoint if necessary.
 *
 * @throws IOException
 */
void recoverCreate(boolean format) throws IOException {
  storage.attemptRestoreRemovedStorage();
  storage.unlockAll();

  for (Iterator<StorageDirectory> it = 
               storage.dirIterator(); it.hasNext();) {
    StorageDirectory sd = it.next();
    boolean isAccessible = true;
    try { // create directories if don't exist yet
      if(!sd.getRoot().mkdirs()) {
        // do nothing, directory is already created
      }
    } catch(SecurityException se) {
      isAccessible = false;
    }
    if(!isAccessible)
      throw new InconsistentFSStateException(sd.getRoot(),
          "cannot access checkpoint directory.");
    
    if (format) {
      // Don't confirm, since this is just the secondary namenode.
      LOG.info("Formatting storage directory " + sd);
      sd.clearDirectory();
    }
    
    StorageState curState;
    try {
      curState = sd.analyzeStorage(HdfsServerConstants.StartupOption.REGULAR, storage);
      // sd is locked but not opened
      switch(curState) {
      case NON_EXISTENT:
        // fail if any of the configured checkpoint dirs are inaccessible 
        throw new InconsistentFSStateException(sd.getRoot(),
              "checkpoint directory does not exist or is not accessible.");
      case NOT_FORMATTED:
        break;  // it's ok since initially there is no current and VERSION
      case NORMAL:
        // Read the VERSION file. This verifies that:
        // (a) the VERSION file for each of the directories is the same,
        // and (b) when we connect to a NN, we can verify that the remote
        // node matches the same namespace that we ran on previously.
        storage.readProperties(sd);
        break;
      default:  // recovery is possible
        sd.doRecover(curState);
      }
    } catch (IOException ioe) {
      sd.unlock();
      throw ioe;
    }
  }
}