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https://issues.apache.org/jira/browse/SPARK-26951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16774864#comment-16774864
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Hyukjin Kwon commented on SPARK-26951:
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Can you describe why it should retry?
> Should not throw KryoException when root cause is IOexception
> -------------------------------------------------------------
>
> Key: SPARK-26951
> URL: https://issues.apache.org/jira/browse/SPARK-26951
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.4.0
> Reporter: zhoukang
> Priority: Major
>
> Job will failed with below exception:
> {code:java}
> Job aborted due to stage failure: Task 1576 in stage 97.0 failed 4 times,
> most recent failure: Lost task 1576.3 in stage 97.0 (TID 121949, xxx,
> executor 14): com.esotericsoftware.kryo.KryoException: java.io.IOException:
> Stream is corrupted. The lz4's magic number should be
> LZ4Block(4c5a34426c6f636b), but received buffer's head bytes is
> (0000000000000000).
> {code}
> {code:java}
> Job aborted due to stage failure: Task 1576 in stage 97.0 failed 4 times,
> most recent failure: Lost task 1576.3 in stage 97.0 (TID 121949, xxx,
> executor 14): com.esotericsoftware.kryo.KryoException: java.io.IOException:
> Stream is corrupted. The lz4's magic number should be
> LZ4Block(4c5a34426c6f636b), but received buffer's head bytes is
> (0000000000000000).
> at com.esotericsoftware.kryo.io.Input.fill(Input.java:166)
> at com.esotericsoftware.kryo.io.Input.require(Input.java:196)
> at com.esotericsoftware.kryo.io.Input.readVarInt(Input.java:373)
> at
> com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:127)
> at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:693)
> at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:804)
> at
> org.apache.spark.serializer.KryoDeserializationStream.readObject(KryoSerializer.scala:244)
> at
> org.apache.spark.serializer.DeserializationStream$$anon$1.getNext(Serializer.scala:169)
> at org.apache.spark.util.NextIterator.hasNext(NextIterator.scala:73)
> at
> org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:39)
> at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala:461)
> at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
> at
> org.apache.spark.shuffle.sort.UnsafeShuffleWriter.write(UnsafeShuffleWriter.java:180)
> at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:96)
> at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:53)
> at org.apache.spark.scheduler.Task.run(Task.scala:99)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:324)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.io.IOException: Stream is corrupted. The lz4's magic number
> should be LZ4Block(4c5a34426c6f636b), but received buffer's head bytes is
> (0000000000000000).
> at
> org.apache.spark.io.LZ4BlockInputStream.refill(LZ4BlockInputStream.java:169)
> at
> org.apache.spark.io.LZ4BlockInputStream.read(LZ4BlockInputStream.java:127)
> at com.esotericsoftware.kryo.io.Input.fill(Input.java:164)
> ... 19 more
> Driver stacktrace:
> {code}
> For IOException, it should retry
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