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From srowen <>
Subject [GitHub] spark issue #14961: [SPARK-17379] [BUILD] Upgrade netty-all to 4.0.41 final ...
Date Tue, 06 Sep 2016 16:57:09 GMT
Github user srowen commented on the issue:
    Hm, no I take it back, it's a consistent failure that doesn't show up in the main test
builds (for any Hadoop version):
    [info] - using external shuffle service *** FAILED *** (1 minute, 33 seconds)
    [info]   org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in
stage 0.0 failed 4 times, most recent failure: Lost task 0.3 in stage 0.0 (TID 11, localhost): Failed to fetch block after
1 fetch failures. Most recent failure cause:
    [info] 	at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1260)
    [info] 	at org.apache.spark.broadcast.TorrentBroadcast.readBroadcastBlock(TorrentBroadcast.scala:174)
    [info] 	at org.apache.spark.broadcast.TorrentBroadcast._value$lzycompute(TorrentBroadcast.scala:65)
    [info] 	at org.apache.spark.broadcast.TorrentBroadcast._value(TorrentBroadcast.scala:65)
    [info] 	at org.apache.spark.broadcast.TorrentBroadcast.getValue(TorrentBroadcast.scala:89)
    [info] 	at org.apache.spark.broadcast.Broadcast.value(Broadcast.scala:70)
    [info] 	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:72)
    [info] 	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:47)
    [info] 	at
    [info] 	at org.apache.spark.executor.Executor$
    [info] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(
    [info] 	at java.util.concurrent.ThreadPoolExecutor$
    [info] 	at
    [info] Caused by: Failed to fetch block
after 1 fetch failures. Most recent failure cause:
    [info] 	at
    [info] 	at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1.apply$mcVI$sp(TorrentBroadcast.scala:136)
    [info] 	at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1.apply(TorrentBroadcast.scala:125)
    [info] 	at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1.apply(TorrentBroadcast.scala:125)
    [info] 	at scala.collection.immutable.List.foreach(List.scala:381)
    [info] 	at$apache$spark$broadcast$TorrentBroadcast$$readBlocks(TorrentBroadcast.scala:125)
    [info] 	at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$readBroadcastBlock$1.apply(TorrentBroadcast.scala:186)
    [info] 	at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1253)
    [info] 	... 12 more
    [info] Caused by: org.apache.spark.SparkException: Exception thrown in awaitResult: 
    [info] 	at org.apache.spark.util.ThreadUtils$.awaitResult(ThreadUtils.scala:194)
    [info] 	at
    [info] 	at
    [info] 	... 19 more
    [info] Caused by: Connection reset by peer
    [info] 	at Method)
    [info] 	at
    [info] 	at
    [info] 	at
    [info] 	at
    [info] 	at io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(
    [info] 	at io.netty.buffer.AbstractByteBuf.writeBytes(
    [info] 	at
    [info] 	at$
    [info] 	at
    [info] 	at
    [info] 	at
    [info] 	at
    [info] 	at io.netty.util.concurrent.SingleThreadEventExecutor$
    [info] 	at io.netty.util.concurrent.DefaultThreadFactory$
    [info] 	... 1 more
    The rest are knock-on errors.
    Clearly something to do with the block fetcher no longer quite working, or maybe failing
to start. If you want to debug it I'd maybe scan `mvn dependency:tree` to see if somehow this
updated only one of several netty artifacts and we somehow have a mismatched set now. (You
will see Netty 3 artifacts from Hadoop but the question is whether something is stuck on 4.0.29).

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