问题
I have a three node spark cluster on Amazon EC2 two of them are in the 1-a availability zone and one in the 1-b. I started a spark-streaming using 2 cores. One core would be consumed by the receiver and another core left would be for task processing. When the executor for task processing is running on 1-a zone it works perfectly fine. But if the executor for task processing starts on 1-b zone batch jobs are queued a lot and processsing time keep on increasing. I am attaching the screenshot below :
Also, once i got this error. So, i have created entry in /etc/hosts for each spark node. But despite of that it queued up the jobs. Can anyone help me point out the issue here.
FetchFailed(BlockManagerId(0, ip-x-x-x-x, 49445), shuffleId=32, mapId=0, reduceId=1, message=
org.apache.spark.shuffle.FetchFailedException: Failed to connect to ip-x-x-x-x:49445
at org.apache.spark.storage.ShuffleBlockFetcherIterator.throwFetchFailedException(ShuffleBlockFetcherIterator.scala:323)
at org.apache.spark.storage.ShuffleBlockFetcherIterator.next(ShuffleBlockFetcherIterator.scala:300)
at org.apache.spark.storage.ShuffleBlockFetcherIterator.next(ShuffleBlockFetcherIterator.scala:51)
at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala:371)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:327)
at org.apache.spark.util.CompletionIterator.hasNext(CompletionIterator.scala:32)
at org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:39)
at org.apache.spark.util.collection.ExternalSorter.insertAll(ExternalSorter.scala:197)
at org.apache.spark.shuffle.BlockStoreShuffleReader.read(BlockStoreShuffleReader.scala:103)
at org.apache.spark.rdd.ShuffledRDD.compute(ShuffledRDD.scala:98)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:306)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:270)
at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:306)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:270)
at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:73)
at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
at org.apache.spark.scheduler.Task.run(Task.scala:89)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Failed to connect to ip-x-x-x-x:49445
at org.apache.spark.network.client.TransportClientFactory.createClient(TransportClientFactory.java:216)
at org.apache.spark.network.client.TransportClientFactory.createClient(TransportClientFactory.java:167)
at org.apache.spark.network.netty.NettyBlockTransferService$$anon$1.createAndStart(NettyBlockTransferService.scala:90)
at org.apache.spark.network.shuffle.RetryingBlockFetcher.fetchAllOutstanding(RetryingBlockFetcher.java:140)
at org.apache.spark.network.shuffle.RetryingBlockFetcher.access$200(RetryingBlockFetcher.java:43)
at org.apache.spark.network.shuffle.RetryingBlockFetcher$1.run(RetryingBlockFetcher.java:170)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
... 3 more
Caused by: java.nio.channels.UnresolvedAddressException
at sun.nio.ch.Net.checkAddress(Net.java:107)
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:649)
at io.netty.channel.socket.nio.NioSocketChannel.doConnect(NioSocketChannel.java:209)
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.connect(AbstractNioChannel.java:207)
at io.netty.channel.DefaultChannelPipeline$HeadContext.connect(DefaultChannelPipeline.java:1097)
at io.netty.channel.AbstractChannelHandlerContext.invokeConnect(AbstractChannelHandlerContext.java:471)
at io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.java:456)
at io.netty.channel.ChannelOutboundHandlerAdapter.connect(ChannelOutboundHandlerAdapter.java:47)
at io.netty.channel.AbstractChannelHandlerContext.invokeConnect(AbstractChannelHandlerContext.java:471)
at io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.java:456)
at io.netty.channel.ChannelDuplexHandler.connect(ChannelDuplexHandler.java:50)
at io.netty.channel.AbstractChannelHandlerContext.invokeConnect(AbstractChannelHandlerContext.java:471)
at io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.java:456)
at io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.java:438)
at io.netty.channel.DefaultChannelPipeline.connect(DefaultChannelPipeline.java:908)
at io.netty.channel.AbstractChannel.connect(AbstractChannel.java:203)
at io.netty.bootstrap.Bootstrap$2.run(Bootstrap.java:166)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:357)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
... 1 more
来源：https://stackoverflow.com/questions/40153442/jobs-are-queued-up-in-sparkstreaming