```
OkHttpDebugLogging.enableHttp2()
OkHttpDebugLogging.enableTaskRunner()
```

### Activating on Android

```
$ adb shell setprop log.tag.okhttp.Http2 DEBUG
$ adb shell setprop log.tag.okhttp.TaskRunner DEBUG
$ adb logcat '*:E' 'okhttp.Http2:D' 'okhttp.TaskRunner:D'
```

### HTTP/2 Frame Logging

This logs inbound (`<<`) and outbound (`>>`) frames for HTTP/2 connections.

```

      CommandLine -> {
        return ProcessBuilder(
          "tshark",
          "-l",
          "-V",
          "-o",
          "tls.keylog_file:$logFile",
          "-Y",
          "http2",
          "-O",
          "http2,tls",
        ).redirectInput(File("/dev/null"))
          .redirectOutput(Redirect.INHERIT)
          .redirectError(Redirect.INHERIT)
          .start()
      }
      Gui -> {

import kotlin.reflect.KClass
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.http2.Http2

object OkHttpDebugLogging {
  // Keep references to loggers to prevent their configuration from being GC'd.
  private val configuredLoggers = CopyOnWriteArraySet<Logger>()

  fun enableHttp2() = enable(Http2::class)

  fun enableTaskRunner() = enable(TaskRunner::class)

  fun logHandler() =

import java.util.logging.ConsoleHandler
import java.util.logging.Level
import java.util.logging.LogManager
import java.util.logging.LogRecord
import java.util.logging.Logger
import okhttp3.internal.http2.Http2

class LoggingUtil {
  companion object {
    private val activeLoggers = mutableListOf<Logger>()

    fun configureLogging(
      debug: Boolean,
      showHttp2Frames: Boolean,
      sslDebug: Boolean,

import okhttp3.internal.http1.Http1ExchangeCodec
import okhttp3.internal.http2.ConnectionShutdownException
import okhttp3.internal.http2.ErrorCode
import okhttp3.internal.http2.FlowControlListener
import okhttp3.internal.http2.Http2Connection
import okhttp3.internal.http2.Http2ExchangeCodec
import okhttp3.internal.http2.Http2Stream
import okhttp3.internal.http2.Settings
import okhttp3.internal.http2.StreamResetException
import okhttp3.internal.isHealthy

import okhttp3.internal.concurrent.TaskRunner.RealBackend
import okhttp3.internal.concurrent.withLock
import okhttp3.internal.http2.Http2
import okhttp3.internal.http2.Http2Connection
import okhttp3.internal.http2.Http2ConnectionTest
import okhttp3.internal.http2.MockHttp2Peer
import okhttp3.internal.http2.Settings
import org.junit.jupiter.api.AfterEach
import org.junit.jupiter.api.Disabled
import org.junit.jupiter.api.Test

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.http2

/** http://tools.ietf.org/html/draft-ietf-httpbis-http2-17#section-7 */
enum class ErrorCode constructor(
  val httpCode: Int,
) {
  /** Not an error!  */
  NO_ERROR(0),

  PROTOCOL_ERROR(1),

  INTERNAL_ERROR(2),

import okhttp3.Request
import okhttp3.TlsVersion
import okhttp3.brotli.Brotli
import okhttp3.dnsoverhttps.DnsOverHttps
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.http2.Http2
import okhttp3.internal.platform.Android10Platform
import okhttp3.internal.platform.AndroidPlatform
import okhttp3.internal.platform.Platform
import okhttp3.internal.platform.PlatformRegistry

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.http2

import java.io.IOException

/** Thrown when an HTTP/2 stream is canceled without damage to the socket that carries it. */
class StreamResetException(
  @JvmField val errorCode: ErrorCode,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.http2

import java.io.IOException

/**
 * Thrown when an HTTP/2 connection is shutdown (either explicitly or if the peer has sent a GOAWAY
 * frame) and an attempt is made to use the connection.
 */