*
 * <p>"IPv4 mapped" addresses were originally a representation of IPv4 addresses for use on an IPv6
 * socket that could receive both IPv4 and IPv6 connections (by disabling the {@code IPV6_V6ONLY}
 * socket option on an IPv6 socket). Yes, it's confusing. Nevertheless, these "mapped" addresses
 * were never supposed to be seen on the wire. That assumption was dropped, some say mistakenly, in

## Changelog since v1.12.7

### Other notable changes

* Connections from Pods to Services with 0 endpoints will now ICMP reject immediately, rather than blackhole and timeout. ([#72534](https://github.com/kubernetes/kubernetes/pull/72534), [@thockin](https://github.com/thockin))

### Other (Cleanup or Flake)

- Kube-apiserver: sets an upper-bound on the lifetime of idle keep-alive connections and time to read the headers of incoming requests ([#103958](https://github.com/kubernetes/kubernetes/pull/103958), [@liggitt](https://github.com/liggitt)) [SIG API Machinery and Node]

## Dependencies

### Added

 * international domain names work everywhere. For example, "σ" encodes as "xn--4xa". The encoded
 * string is not human readable, but can be used with classes like [InetAddress] to establish
 * connections.
 *
 * ## Why another URL model?
 *
 * Java includes both [java.net.URL][URL] and [java.net.URI][URI]. We offer a new URL
 * model to address problems that the others don't.
 *

- github.com/docker/docker: [be7ac8b → aa6a989](https://github.com/docker/docker/compare/be7ac8b...aa6a989)
- github.com/docker/go-connections: [v0.3.0 → v0.4.0](https://github.com/docker/go-connections/compare/v0.3.0...v0.4.0)
- github.com/evanphx/json-patch: [v4.2.0+incompatible → e83c0a1](https://github.com/evanphx/json-patch/compare/v4.2.0...e83c0a1)

### Other (Cleanup or Flake)

- Kube-apiserver: sets an upper-bound on the lifetime of idle keep-alive connections and time to read the headers of incoming requests ([#103958](https://github.com/kubernetes/kubernetes/pull/103958), [@liggitt](https://github.com/liggitt)) [SIG API Machinery and Node]

## Dependencies

### Added

    assertThat(server.takeRequest().exchangeIndex).isEqualTo(2)
  }

  /**
   * Each OkHttpClient used to get its own instance of NullProxySelector, and because these weren't
   * equal their connections weren't pooled. That's a nasty performance bug!
   *
   * https://github.com/square/okhttp/issues/5519
   */
  @Test
  fun connectionPoolingWithFreshClientSamePool() {

- The kubelet no longer forcefully closes active connections on heartbeat failures, using the HTTP2 health check mechanism to detect broken connections. Users can force the previous behavior of the kubelet by setting the environment variable DISABLE_HTTP2. ([#108107](https://github.com/kubernetes/kubernetes/pull/108107), [@aojea](https://github.com/aojea))...

      </codeSegments>
    </class>
    <class>
      <name>RepositoryBase</name>
      <version>4.0.0+</version>
      <description>A repository contains the information needed for establishing connections with
        remote repository.</description>
      <fields>
        <field>
          <name>id</name>
          <version>4.0.0+</version>
          <required>true</required>

import org.codelibs.fess.util.OptionalUtil;
import org.dbflute.optional.OptionalEntity;
import org.dbflute.util.DfTypeUtil;

import jakarta.annotation.PostConstruct;

/**
 * Manages LDAP connections and operations.
 */
public class LdapManager {
    private static final Logger logger = LogManager.getLogger(LdapManager.class);

    /** A thread-local variable to hold the directory context. */