Github user tdas commented on a diff in the pull request: https://github.com/apache/spark/pull/247#discussion_r11282425 --- Diff: streaming/src/main/scala/org/apache/spark/streaming/dstream/NetworkInputDStream.scala --- @@ -124,84 +143,109 @@ abstract class NetworkReceiver[T: ClassTag]() extends Serializable with Logging receivingThread // Call user-defined onStart() + logInfo("Calling onStart") onStart() + + // Wait until interrupt is called on this thread + while(true) Thread.sleep(100000) } catch { case ie: InterruptedException => - logInfo("Receiving thread interrupted") - //println("Receiving thread interrupted") + logInfo("Receiving thread has been interrupted, receiver " + streamId + " stopped") case e: Exception => - stopOnError(e) + logError("Error receiving data in receiver " + streamId, e) + exceptions += e + } + + // Call user-defined onStop() + logInfo("Calling onStop") + try { + onStop() + } catch { + case e: Exception => + logError("Error stopping receiver " + streamId, e) + exceptions += e + } + + val message = if (exceptions.isEmpty) { + null + } else if (exceptions.size == 1) { + val e = exceptions.head + "Exception in receiver " + streamId + ": " + e.getMessage + "\n" + e.getStackTraceString + } else { + "Multiple exceptions in receiver " + streamId + "(" + exceptions.size + "):\n" + exceptions.zipWithIndex.map { + case (e, i) => "Exception " + i + ": " + e.getMessage + "\n" + e.getStackTraceString + }.mkString("\n") } + logInfo("Deregistering receiver " + streamId) + val future = trackerActor.ask(DeregisterReceiver(streamId, message))(askTimeout) + Await.result(future, askTimeout) + logInfo("Deregistered receiver " + streamId) + env.actorSystem.stop(actor) + logInfo("Stopped receiver " + streamId) } /** - * Stops the receiver. First it interrupts the main receiving thread, + * Stop the receiver. First it interrupts the main receiving thread, * that is, the thread that called receiver.start(). Then it calls the user-defined * onStop() method to stop other threads and/or do cleanup. */ def stop() { + // Stop receiving by interrupting the receiving thread receivingThread.interrupt() - onStop() - //TODO: terminate the actor + logInfo("Interrupted receiving thread " + receivingThread + " for stopping") } /** - * Stops the receiver and reports exception to the tracker. + * Stop the receiver and reports exception to the tracker. * This should be called whenever an exception is to be handled on any thread * of the receiver. */ protected def stopOnError(e: Exception) { logError("Error receiving data", e) + exceptions += e stop() - actor ! ReportError(e.toString) } - /** - * Pushes a block (as an ArrayBuffer filled with data) into the block manager. + * Push a block (as an ArrayBuffer filled with data) into the block manager. */ def pushBlock(blockId: BlockId, arrayBuffer: ArrayBuffer[T], metadata: Any, level: StorageLevel) { + logInfo("Block " + blockId + " has last element as " + arrayBuffer.last) env.blockManager.put(blockId, arrayBuffer.asInstanceOf[ArrayBuffer[Any]], level) - actor ! ReportBlock(blockId, metadata) + trackerActor ! AddBlocks(streamId, Array(blockId), metadata) + logInfo("Pushed block " + blockId) --- End diff -- Converted to debug.
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