}
        val connection =
          Http2Connection
            .Builder(false, TaskRunner.INSTANCE)
            .socket(sslSocket.asBufferedSocket(), sslSocket.peerName())
            .listener(this)
            .build()
        connection.start()
      } catch (e: IOException) {
        logger.log(Level.INFO, "Http2Server connection failure: $e")
        socket?.closeQuietly()

stuck on the old version.

 *  **There is no longer a global singleton connection pool.** In OkHttp 2.x,
    all `OkHttpClient` instances shared a common connection pool by default.
    In OkHttp 3.x, each new `OkHttpClient` gets its own private connection pool.
    Applications should avoid creating many connection pools as doing so
    prevents connection reuse. Each connection pool holds its own set of

        final HttpURLConnection connection = (HttpURLConnection) (proxy != null ? u.openConnection(proxy) : u.openConnection());
        if (sslSocketFactory != null && connection instanceof HttpsURLConnection) {
            ((HttpsURLConnection) connection).setSSLSocketFactory(sslSocketFactory);
        }
        return connection;
    }

    /**

Lokhttp3/internal/connection/ExchangeFinder;
Lokhttp3/internal/connection/FastFallbackExchangeFinder;
Lokhttp3/internal/connection/RealCall$AsyncCall;
Lokhttp3/internal/connection/RealCall$CallReference;
Lokhttp3/internal/connection/RealCall$timeout$1;
Lokhttp3/internal/connection/RealCall;
Lokhttp3/internal/connection/RealConnection;
Lokhttp3/internal/connection/RealConnectionPool$cleanupTask$1;
Lokhttp3/internal/connection/RealConnectionPool;

    routePlanner.defaultConnectionIdleAtNanos = expireSooner

    // Turn it into an http/2 connection that supports 5 concurrent streams
    // which can satisfy a larger policy
    val connection = routePlanner.plans.first().connection
    val http2Connection = connectHttp2(peer, connection, 5)
    setPolicy(pool, address, AddressPolicy(5))
    assertThat(pool.connectionCount()).isEqualTo(1)

        val connection =
          Http2Connection
            .Builder(false, taskRunner)
            .socket(socket, socket.javaNetSocket.remoteSocketAddress.toString())
            .listener(http2SocketHandler)
            .build()
        connection.start()
        openConnections.add(connection)
        openClientSockets.remove(socket.javaNetSocket)
        return

    @Throws(IOException::class)
    fun proceed(request: Request): Response

    /**
     * Returns the connection the request will be executed on. This is only available in the chains
     * of network interceptors; for application interceptors this is always null.
     */
    fun connection(): Connection?

    fun call(): Call

    fun connectTimeoutMillis(): Int

    fun withConnectTimeout(
      timeout: Int,

            clientTestRule.wrap(
              object : EventListener() {
                override fun connectionAcquired(
                  call: Call,
                  connection: Connection,
                ) {
                  socketClass = connection.socket().javaClass.name
                }
              },
            ),
          ).build()

      val response = client.newCall(request).execute()

        Request
          .Builder()
          .url(server.url("/"))
          .header("Connection", "upgrade")
          .post("Hello".toRequestBody())
          .build()
      }
    assertThat(e).hasMessage("expected a null request body with 'Connection: upgrade'")
  }

  private fun enableTls(vararg protocols: Protocol) {
    client =
      client
        .newBuilder()

    }
  }

  @Test fun headersEquals() {
    val headers1 =
      Headers
        .Builder()
        .add("Connection", "close")
        .add("Transfer-Encoding", "chunked")
        .build()
    val headers2 =
      Headers
        .Builder()
        .add("Connection", "close")
        .add("Transfer-Encoding", "chunked")
        .build()
    assertThat(headers2).isEqualTo(headers1)