fix Sink.queue when buffer has run full #19675

2016-02-02 19:38:00 +01:00 · 2016-02-02 19:38:00 +01:00 · fa3b36dcee
commit fa3b36dcee
parent 9580b58011
2 changed files with 22 additions and 2 deletions
--- a/akka-stream/src/main/scala/akka/stream/impl/Sinks.scala
+++ b/akka-stream/src/main/scala/akka/stream/impl/Sinks.scala
@ -277,7 +277,10 @@ private[akka] class QueueSink[T]() extends GraphStageWithMaterializedValue[SinkS
            promise.failure(new IllegalStateException("You have to wait for previous future to be resolved to send another request"))
          case None ⇒
            if (buffer.isEmpty) currentRequest = Some(promise)
-            else sendDownstream(promise)
+            else {
+              if (buffer.used == maxBuffer - 1) tryPull(in)
+              sendDownstream(promise)
+            }
        })

      def sendDownstream(promise: Requested[T]): Unit = {