listener.stopped();
        }

        @Override
        public String toString() {
          return "stopped()";
        }
      };

  /**
   * A listener for the aggregate state changes of the services that are under management. Users
   * that need to listen to more fine-grained events (such as when each particular {@linkplain

   * 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**

 *
 * The configuration of each spec changes with each OkHttp release. This is annoying: upgrading
 * your OkHttp library can break connectivity to certain web servers! But it’s a necessary annoyance
 * because the TLS ecosystem is dynamic and staying up to date is necessary to stay secure. See
 * [OkHttp's TLS Configuration History][tls_history] to track these changes.
 *

import java.net.InetAddress;
import java.util.ArrayList;
import java.util.List;

/**
 * Represents a witness notification received from the witness service.
 * Contains event information, resource details, and IP address changes.
 */
public class WitnessNotification {
    private WitnessEventType eventType;
    private long timestamp;
    private String resourceName;
    private final List<WitnessIPAddress> newIPAddresses;

      Map<K, Collection<V>> asMap(Multimap<K, V> multimap) {
    return multimap.asMap();
  }

  /**
   * Returns a multimap view of the specified map. The multimap is backed by the map, so changes to
   * the map are reflected in the multimap, and vice versa. If the map is modified while an
   * iteration over one of the multimap's collection views is in progress (except through the

      Map<K, Collection<V>> asMap(Multimap<K, V> multimap) {
    return multimap.asMap();
  }

  /**
   * Returns a multimap view of the specified map. The multimap is backed by the map, so changes to
   * the map are reflected in the multimap, and vice versa. If the map is modified while an
   * iteration over one of the multimap's collection views is in progress (except through the

import okhttp3.internal.platform.Platform

/**
 * Example of using a hardware key to perform client auth.
 * Prefer recent JDK builds, and results are temperamental to slight environment changes.
 * Different instructions and configuration may be required for other hardware devices.
 *
 * Using a yubikey device as a SSL key store.
 * https://lauri.võsandi.com/2017/03/yubikey-for-ssh-auth.html
 *

   * flavors can read old data or data from the other flavor. However, we strongly discourage
   * relying on this, as we have made incompatible changes to serialized forms in the past and
   * expect to do so again, as discussed in https://github.com/google/guava#important-warnings.
   */
  @SuppressWarnings("unused")

import jcifs.internal.smb1.AndXServerMessageBlock;
import jcifs.internal.util.SMBUtil;

/**
 * SMB1 COM_LOCKING_ANDX command implementation.
 *
 * This command locks or unlocks byte ranges within a file. It can also
 * be used to break oplocks and change oplock levels.
 *
 * @author mbechler
 */
public class SmbComLockingAndX extends AndXServerMessageBlock {

    private int fid;