- Reset streams when an error happens during port-forward allowing kubectl to maintain port-forward connection open. ([#128318](https://github.com/kubernetes/kubernetes/pull/128318), [@soltysh](https://github.com/soltysh)) [SIG API Machinery, CLI and Node]

    val type: MediaType = multipartBody.type
    val boundary: String = multipartBody.boundary
    val size: Int = multipartBody.size
    val parts: List<MultipartBody.Part> = multipartBody.parts
    val part: MultipartBody.Part = multipartBody.part(0)
    val contentType: MediaType = multipartBody.contentType()
    val contentLength: Long = multipartBody.contentLength()

  - `spec.backend` -> `spec.defaultBackend`
  - `serviceName` -> `service.name`
  - `servicePort` -> `service.port.name` (for string values)
  - `servicePort` -> `service.port.number` (for numeric values)
  - `pathType` no longer has a default value in v1; "Exact", "Prefix", or "ImplementationSpecific" must be specified

  Other Ingress API updates:

## Detailed Bug Fixes And Changes

### API Machinery

- client-go: `PortForwarder.GetPorts()` now contain correct local port if no local port was initially specified when setting up the port forwarder ([#73676](https://github.com/kubernetes/kubernetes/pull/73676), [@martin-helmich](https://github.com/martin-helmich))

      public String join(Iterable<?> parts) {
        return join(parts.iterator());
      }

      @Override
      public <A extends Appendable> A appendTo(A appendable, Iterator<?> parts) throws IOException {
        checkNotNull(appendable, "appendable");
        checkNotNull(parts, "parts");
        while (parts.hasNext()) {
          Object part = parts.next();
          if (part != null) {

import okio.Source
import okio.Timeout
import okio.buffer

/**
 * Reads a stream of [RFC 2046][rfc_2046] multipart body parts. Callers read parts one-at-a-time
 * until [nextPart] returns null. After calling [nextPart] any preceding parts should not be read.
 *
 * Typical use loops over the parts in sequence:
 *
 * ```kotlin
 * val response: Response = call.execute()
 * val multipartReader = MultipartReader(response.body!!)
 *

      )

    assertThat(parts.nextPart()).isNotNull()
    assertThat(parts.nextPart()).isNull()
    assertThat(parts.nextPart()).isNull()
  }

  @Test fun `empty source`() {
    val parts =
      MultipartReader(
        boundary = "simple boundary",
        source = Buffer(),
      )

    assertFailsWith<EOFException> {
      parts.nextPart()
    }
  }

      fun addPart(part: Part) =
        apply {
          parts += part
        }

      /** Assemble the specified parts into a request body. */
      fun build(): MultipartBody {
        check(parts.isNotEmpty()) { "Multipart body must have at least one part." }
        return MultipartBody(boundary, type, parts.toImmutableList())
      }
    }

  companion object {
    /**

        this.server = server;
    }

    /**
     * Returns the SMB server port.
     * @return the server port
     */
    public int getPort() {
        return port;
    }

    /**
     * Sets the SMB server port.
     * @param port the server port to set
     */
    public void setPort(final int port) {
        this.port = port;
    }

    /**
     * Returns the username for SMB authentication.

  that prevented the control plane's pod garbage collector from deleting pods that contained duplicated field keys (env. variables with repeated keys or container ports). ([#121381](https://github.com/kubernetes/kubernetes/pull/121381), [@mimowo](https://github.com/mimowo)) [SIG Apps, Auth, Scheduling and Testing]