Binding failed

Error Message

Binding failed. Switch on DEBUG-level logging for `akka.io.TcpListener` to log the cause

Stacktrace

java.lang.RuntimeException: Binding failed. Switch on DEBUG-level logging for `akka.io.TcpListener` to log the cause.
    at spray.routing.SimpleRoutingApp$$anonfun$startServer$1.apply(SimpleRoutingApp.scala:68)
    at spray.routing.SimpleRoutingApp$$anonfun$startServer$1.apply(SimpleRoutingApp.scala:63)
    at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:251)
    at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:249)
    at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32)
    at akka.dispatch.BatchingExecutor$Batch$$anonfun$run$1.processBatch$1(BatchingExecutor.scala:67)
    at akka.dispatch.BatchingExecutor$Batch$$anonfun$run$1.apply$mcV$sp(BatchingExecutor.scala:82)
    at akka.dispatch.BatchingExecutor$Batch$$anonfun$run$1.apply(BatchingExecutor.scala:59)
    at akka.dispatch.BatchingExecutor$Batch$$anonfun$run$1.apply(BatchingExecutor.scala:59)
    at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:72)
    at akka.dispatch.BatchingExecutor$Batch.run(BatchingExecutor.scala:58)
    at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
    at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401)
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

Standard Output

329453 main  INFO org.elasticmq.rest.sqs.TheSQSRestServerBuilder Started SQS rest server, bind address localhost:56781, visible server address http://localhost:9324
[WARN] [10/07/2015 19:13:31.265] [elasticmq-akka.actor.default-dispatcher-2] [akka://elasticmq/user/IO-HTTP/listener-0] Bind to localhost/127.0.0.1:56781 failed, timeout 1 second expired
[INFO] [10/07/2015 19:13:31.298] [elasticmq-akka.actor.default-dispatcher-4] [akka://elasticmq/user/IO-HTTP/listener-0] Message [akka.io.Tcp$Bound] from Actor[akka://elasticmq/system/IO-TCP/selectors/$a/0#-260055602] to Actor[akka://elasticmq/user/IO-HTTP/listener-0#-1846361151] was not delivered. [1] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.

Start at spray.routing.SimpleRoutingApp in SimpleRoutingApp.scala around lines 63-68, then inspect the akka.io.TcpListener DEBUG output associated with the failed bind to localhost/127.0.0.1:56781. Determine why the SQS REST server cannot bind that address and verify that server startup completes without the binding-failed exception.