hadoop CommitUtils 源码

  • 2022-10-20
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haddop CommitUtils 代码


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 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.hadoop.fs.s3a.commit;

import java.io.IOException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.s3a.S3AFileSystem;

import static org.apache.hadoop.fs.s3a.commit.InternalCommitterConstants.*;
import static org.apache.hadoop.fs.s3a.commit.ValidationFailure.verify;

 * Static utility methods related to S3A commitment processing, both
 * staging and magic.
 * <b>Do not use in any codepath intended to be used from the S3AFS
 * except in the committers themselves.</b>
public final class CommitUtils {
  private static final Logger LOG =

  private CommitUtils() {

   * Verify that the path is a magic one.
   * @param fs filesystem
   * @param path path
   * @throws PathCommitException if the path isn't a magic commit path
  public static void verifyIsMagicCommitPath(S3AFileSystem fs,
      Path path) throws PathCommitException {
    if (!fs.isMagicCommitPath(path)) {
      throw new PathCommitException(path, E_BAD_PATH);

   * Verify that an S3A FS instance is a magic commit FS.
   * @param fs filesystem
   * @throws PathCommitException if the FS isn't a magic commit FS.
  public static void verifyIsMagicCommitFS(S3AFileSystem fs)
      throws PathCommitException {
    if (!fs.isMagicCommitEnabled()) {
      // dump out details to console for support diagnostics
      String fsUri = fs.getUri().toString();
      LOG.error("{}: {}:\n{}", E_NORMAL_FS, fsUri, fs);
      // then fail
      throw new PathCommitException(fsUri, E_NORMAL_FS);

   * Verify that an FS is an S3A FS.
   * @param fs filesystem
   * @param path path to to use in exception
   * @return the typecast FS.
   * @throws PathCommitException if the FS is not an S3A FS.
  public static S3AFileSystem verifyIsS3AFS(FileSystem fs, Path path)
      throws PathCommitException {
    if (!(fs instanceof S3AFileSystem)) {
      throw new PathCommitException(path, E_WRONG_FS);
    return (S3AFileSystem) fs;

   * Get the S3A FS of a path.
   * @param path path to examine
   * @param conf config
   * @param magicCommitRequired is magic complete required in the FS?
   * @return the filesystem
   * @throws PathCommitException output path isn't to an S3A FS instance, or
   * if {@code magicCommitRequired} is set, if doesn't support these commits.
   * @throws IOException failure to instantiate the FS
  public static S3AFileSystem getS3AFileSystem(Path path,
      Configuration conf,
      boolean magicCommitRequired)
      throws PathCommitException, IOException {
    S3AFileSystem s3AFS = verifyIsS3AFS(path.getFileSystem(conf), path);
    if (magicCommitRequired) {
    return s3AFS;

   * Verify that all instances in a collection are of the given class.
   * @param it iterator
   * @param classname classname to require
   * @throws ValidationFailure on a failure
  public static void validateCollectionClass(Iterable it, Class classname)
      throws ValidationFailure {
    for (Object o : it) {
          "Collection element is not a %s: %s", classname, o.getClass());

   * Extract the job ID from a configuration.
   * @param conf configuration
   * @return a job ID or null.
  public static String extractJobID(Configuration conf) {

    String jobUUID = conf.getTrimmed(FS_S3A_COMMITTER_UUID, "");

    if (!jobUUID.isEmpty()) {
      return jobUUID;
    // there is no job UUID.
    // look for one from spark
    jobUUID = conf.getTrimmed(SPARK_WRITE_UUID, "");
    if (!jobUUID.isEmpty()) {
      return jobUUID;
    jobUUID = conf.getTrimmed(MR_JOB_ID, "");
    if (!jobUUID.isEmpty()) {
      return jobUUID;
    return null;



hadoop 源码目录


hadoop AbstractS3ACommitter 源码

hadoop AbstractS3ACommitterFactory 源码

hadoop CommitConstants 源码

hadoop CommitterStatisticNames 源码

hadoop InternalCommitterConstants 源码

hadoop LocalTempDir 源码

hadoop MagicCommitIntegration 源码

hadoop MagicCommitPaths 源码

hadoop PathCommitException 源码

hadoop PutTracker 源码

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