Error “Deflater has been closed” when logging response body with akka-http












4















I am using Akka-Http to make a rest server and i want to log requests and results, however I'm getting an exception whenever i try to do runReduce on the response entity. The exception says java.lang.NullPointerException: Deflater has been closed. The exception does not prevent me from logging the body, but i only get gibberish in the log: ��]D�O!�c�?�%{�GY��>������t. Can someone explain why this is happening? I suspect its because the stream that stores the response-body is closed or not opened but i don't know how to solve it.



The set-up for logging is shown below. The logging happens in the logResponse-method inside RequestResponseLogWriter. I use akkas own directives for getting the request and response entities. Logging is done with slf4j.



trait RouteBuilder extends Directives {

val logWriter = new RequestResponseLogWriter()

val routes: Route =
extractRequestContext { context =>
logRequestResult(LoggingMagnet(_ => logWriter.responseLogging(context))) {
ComponentRegistry.searchRestApi.routes
}
}
}


class RequestResponseLogWriter extends LazyLogging {
val responseLogging = (context: RequestContext) => (request: HttpRequest) =>
(result: RouteResult) =>
result match {
case RouteResult.Complete(response) => logResponse(context, request, response)
case RouteResult.Rejected(_) =>
}

private def logResponse(context: RequestContext, request: HttpRequest,
response: HttpResponse): Unit = {
implicit val ec: ExecutionContext = context.executionContext
implicit val mat: Materializer = context.materializer
response.entity.dataBytes.runReduce(_ ++ _)
.foreach(bytes => logger.info(s"Body ${bytes.utf8String}"))
}
}









share|improve this question





























    4















    I am using Akka-Http to make a rest server and i want to log requests and results, however I'm getting an exception whenever i try to do runReduce on the response entity. The exception says java.lang.NullPointerException: Deflater has been closed. The exception does not prevent me from logging the body, but i only get gibberish in the log: ��]D�O!�c�?�%{�GY��>������t. Can someone explain why this is happening? I suspect its because the stream that stores the response-body is closed or not opened but i don't know how to solve it.



    The set-up for logging is shown below. The logging happens in the logResponse-method inside RequestResponseLogWriter. I use akkas own directives for getting the request and response entities. Logging is done with slf4j.



    trait RouteBuilder extends Directives {

    val logWriter = new RequestResponseLogWriter()

    val routes: Route =
    extractRequestContext { context =>
    logRequestResult(LoggingMagnet(_ => logWriter.responseLogging(context))) {
    ComponentRegistry.searchRestApi.routes
    }
    }
    }


    class RequestResponseLogWriter extends LazyLogging {
    val responseLogging = (context: RequestContext) => (request: HttpRequest) =>
    (result: RouteResult) =>
    result match {
    case RouteResult.Complete(response) => logResponse(context, request, response)
    case RouteResult.Rejected(_) =>
    }

    private def logResponse(context: RequestContext, request: HttpRequest,
    response: HttpResponse): Unit = {
    implicit val ec: ExecutionContext = context.executionContext
    implicit val mat: Materializer = context.materializer
    response.entity.dataBytes.runReduce(_ ++ _)
    .foreach(bytes => logger.info(s"Body ${bytes.utf8String}"))
    }
    }









    share|improve this question



























      4












      4








      4








      I am using Akka-Http to make a rest server and i want to log requests and results, however I'm getting an exception whenever i try to do runReduce on the response entity. The exception says java.lang.NullPointerException: Deflater has been closed. The exception does not prevent me from logging the body, but i only get gibberish in the log: ��]D�O!�c�?�%{�GY��>������t. Can someone explain why this is happening? I suspect its because the stream that stores the response-body is closed or not opened but i don't know how to solve it.



      The set-up for logging is shown below. The logging happens in the logResponse-method inside RequestResponseLogWriter. I use akkas own directives for getting the request and response entities. Logging is done with slf4j.



      trait RouteBuilder extends Directives {

      val logWriter = new RequestResponseLogWriter()

      val routes: Route =
      extractRequestContext { context =>
      logRequestResult(LoggingMagnet(_ => logWriter.responseLogging(context))) {
      ComponentRegistry.searchRestApi.routes
      }
      }
      }


      class RequestResponseLogWriter extends LazyLogging {
      val responseLogging = (context: RequestContext) => (request: HttpRequest) =>
      (result: RouteResult) =>
      result match {
      case RouteResult.Complete(response) => logResponse(context, request, response)
      case RouteResult.Rejected(_) =>
      }

      private def logResponse(context: RequestContext, request: HttpRequest,
      response: HttpResponse): Unit = {
      implicit val ec: ExecutionContext = context.executionContext
      implicit val mat: Materializer = context.materializer
      response.entity.dataBytes.runReduce(_ ++ _)
      .foreach(bytes => logger.info(s"Body ${bytes.utf8String}"))
      }
      }









      share|improve this question
















      I am using Akka-Http to make a rest server and i want to log requests and results, however I'm getting an exception whenever i try to do runReduce on the response entity. The exception says java.lang.NullPointerException: Deflater has been closed. The exception does not prevent me from logging the body, but i only get gibberish in the log: ��]D�O!�c�?�%{�GY��>������t. Can someone explain why this is happening? I suspect its because the stream that stores the response-body is closed or not opened but i don't know how to solve it.



      The set-up for logging is shown below. The logging happens in the logResponse-method inside RequestResponseLogWriter. I use akkas own directives for getting the request and response entities. Logging is done with slf4j.



      trait RouteBuilder extends Directives {

      val logWriter = new RequestResponseLogWriter()

      val routes: Route =
      extractRequestContext { context =>
      logRequestResult(LoggingMagnet(_ => logWriter.responseLogging(context))) {
      ComponentRegistry.searchRestApi.routes
      }
      }
      }


      class RequestResponseLogWriter extends LazyLogging {
      val responseLogging = (context: RequestContext) => (request: HttpRequest) =>
      (result: RouteResult) =>
      result match {
      case RouteResult.Complete(response) => logResponse(context, request, response)
      case RouteResult.Rejected(_) =>
      }

      private def logResponse(context: RequestContext, request: HttpRequest,
      response: HttpResponse): Unit = {
      implicit val ec: ExecutionContext = context.executionContext
      implicit val mat: Materializer = context.materializer
      response.entity.dataBytes.runReduce(_ ++ _)
      .foreach(bytes => logger.info(s"Body ${bytes.utf8String}"))
      }
      }






      scala akka-http






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      edited 2 days ago







      Eirik Thon

















      asked Jan 18 at 15:54









      Eirik ThonEirik Thon

      415




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