* The entrySet() of ConcurrentHashMap, unlike that of other Map
     * implementations, supports add() under JDK8. This seems problematic, but I
     * didn't see that discussed in the review, which included many other
     * changes: https://mail.openjdk.org/pipermail/core-libs-dev/2013-May/thread.html#17367
     *
     * TODO(cpovirk): decide what the best long-term action here is: force users

        this.leaseManager = manager;
        this.activeWatchers = new ConcurrentHashMap<>();
        this.failureCounts = new ConcurrentHashMap<>();
    }

    /**
     * Start watching a directory for changes
     *
     * @param directoryPath directory path
     * @param leaseKey lease key
     */
    public void startWatching(String directoryPath, Smb2LeaseKey leaseKey) {

* Usa un archivo "spooled":
    * Un archivo almacenado en memoria hasta un límite de tamaño máximo, y después de superar este límite, se almacenará en el disco.
* Esto significa que funcionará bien para archivos grandes como imágenes, videos, binarios grandes, etc. sin consumir toda la memoria.
* Puedes obtener metadatos del archivo subido.
* Tiene una interfaz `async` [parecida a un archivo](https://docs.python.org/3/glossary.html#term-file-like-object).

                under the License.'''.stripIndent()
            }
          }
        }
      }
    }
  }
}

/**
 * Parses a given XML file, applies a set of changes, and writes those changes back to the original file.
 *
 * @param path Path to existing XML file
 * @param action Action to perform on parsed XML document
 * @param preface optional front matter to add after the XML declaration

    - [Server Binaries](#server-binaries)
    - [Node Binaries](#node-binaries)
    - [Container Images](#container-images)
  - [Changelog since v1.26.14](#changelog-since-v12614)
  - [Changes by Kind](#changes-by-kind)
    - [Feature](#feature)
    - [Bug or Regression](#bug-or-regression)
  - [Dependencies](#dependencies)
    - [Added](#added)
    - [Changed](#changed)
    - [Removed](#removed)

    - [Server Binaries](#server-binaries)
    - [Node Binaries](#node-binaries)
    - [Container Images](#container-images)
  - [Changelog since v1.35.2](#changelog-since-v1352)
  - [Changes by Kind](#changes-by-kind)
    - [Bug or Regression](#bug-or-regression)
    - [Other (Cleanup or Flake)](#other-cleanup-or-flake)
  - [Dependencies](#dependencies)
    - [Added](#added)
    - [Changed](#changed)

    assertThat(emptyGraph.nodeOrder()).isEqualTo(ElementOrder.<String>natural());
  }

  /**
   * Tests that the ImmutableGraph.Builder doesn't change when the creating GraphBuilder changes.
   */
  @Test
  @SuppressWarnings("CheckReturnValue")
  public void immutableGraphBuilder_copiesGraphBuilder() {
    GraphBuilder<String> graphBuilder =
        GraphBuilder.directed()

   * added to the multimap.
   *
   * <p>Changes to the returned set will update the underlying multimap, and vice versa. However,
   * <i>adding</i> to the returned set is not possible.
   */
  @Override
  public Set<K> keySet() {
    return super.keySet();
  }

  /**
   * Returns a collection of all values in the multimap. Changes to the returned collection will

   * added to the multimap.
   *
   * <p>Changes to the returned set will update the underlying multimap, and vice versa. However,
   * <i>adding</i> to the returned set is not possible.
   */
  @Override
  public Set<K> keySet() {
    return super.keySet();
  }

  /**
   * Returns a collection of all values in the multimap. Changes to the returned collection will

- [https://hadoop.apache.org/docs/r3.1.1/hadoop-aws/tools/hadoop-aws/committers.html](https://hadoop.apache.org/docs/r3.1.1/hadoop-aws/tools/hadoop-aws/committers.html)

Once the config changes are applied, proceed to restart **Hadoop** services.

![hdfs-services](https://github.com/minio/minio/blob/master/docs/bigdata/images/image7.png?raw=true "hdfs restart services")

### **3.2 Configure Spark2**