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From lonely Feb <>
Subject broadcast hang out
Date Mon, 16 Mar 2015 03:08:14 GMT
Hi all, i meet up with a problem that torrent broadcast hang out in my
spark cluster (1.2, standalone) , particularly serious when driver and
executors are cross-region. when i read the code of broadcast i found that
a sync block read here:

  def fetchBlockSync(host: String, port: Int, execId: String, blockId:
String): ManagedBuffer = {
    // A monitor for the thread to wait on.
    val result = Promise[ManagedBuffer]()
    fetchBlocks(host, port, execId, Array(blockId),
      new BlockFetchingListener {
        override def onBlockFetchFailure(blockId: String, exception:
Throwable): Unit = {
        override def onBlockFetchSuccess(blockId: String, data:
ManagedBuffer): Unit = {
          val ret = ByteBuffer.allocate(data.size.toInt)
          result.success(new NioManagedBuffer(ret))

    Await.result(result.future, Duration.Inf)

it seems that fetchBlockSync method does not have a timeout limit but wait
forever ? Anybody can show me how to control the timeout here?

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