Github user lianhuiwang commented on a diff in the pull request: https://github.com/apache/spark/pull/1632#discussion_r15573389 --- Diff: core/src/main/scala/org/apache/spark/storage/BlockFetcherIterator.scala --- @@ -117,31 +121,45 @@ object BlockFetcherIterator { }) bytesInFlight += req.size val sizeMap = req.blocks.toMap // so we can look up the size of each blockID - val future = connectionManager.sendMessageReliably(cmId, blockMessageArray.toBufferMessage) - future.onSuccess { - case Some(message) => { - val bufferMessage = message.asInstanceOf[BufferMessage] - val blockMessageArray = BlockMessageArray.fromBufferMessage(bufferMessage) - for (blockMessage <- blockMessageArray) { - if (blockMessage.getType != BlockMessage.TYPE_GOT_BLOCK) { - throw new SparkException( - "Unexpected message " + blockMessage.getType + " received from " + cmId) + + val sendRequestThread = new Thread(s"sendRequestThread(${req.address.host}:${req.address.port})") { --- End diff -- how about to control the number of connect in a blockfetch. that can reduce server's connect.
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