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Posted to issues@spark.apache.org by "Vitaliy Migov (JIRA)" <ji...@apache.org> on 2014/11/04 17:10:38 UTC
[jira] [Updated] (SPARK-3958) Possible stream-corruption issues in
TorrentBroadcast
[ https://issues.apache.org/jira/browse/SPARK-3958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vitaliy Migov updated SPARK-3958:
---------------------------------
Attachment: spark_ex.logs
> Possible stream-corruption issues in TorrentBroadcast
> -----------------------------------------------------
>
> Key: SPARK-3958
> URL: https://issues.apache.org/jira/browse/SPARK-3958
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.1.0, 1.2.0
> Reporter: Josh Rosen
> Assignee: Josh Rosen
> Priority: Blocker
> Attachments: spark_ex.logs
>
>
> TorrentBroadcast deserialization sometimes fails with decompression errors, which are most likely caused by stream-corruption exceptions. For example, this can manifest itself as a Snappy PARSING_ERROR when deserializing a broadcasted task:
> {code}
> 14/10/14 17:20:55.016 DEBUG BlockManager: Getting local block broadcast_8
> 14/10/14 17:20:55.016 DEBUG BlockManager: Block broadcast_8 not registered locally
> 14/10/14 17:20:55.016 INFO TorrentBroadcast: Started reading broadcast variable 8
> 14/10/14 17:20:55.017 INFO TorrentBroadcast: Reading broadcast variable 8 took 5.3433E-5 s
> 14/10/14 17:20:55.017 ERROR Executor: Exception in task 2.0 in stage 8.0 (TID 18)
> java.io.IOException: PARSING_ERROR(2)
> at org.xerial.snappy.SnappyNative.throw_error(SnappyNative.java:84)
> at org.xerial.snappy.SnappyNative.uncompressedLength(Native Method)
> at org.xerial.snappy.Snappy.uncompressedLength(Snappy.java:594)
> at org.xerial.snappy.SnappyInputStream.readFully(SnappyInputStream.java:125)
> at org.xerial.snappy.SnappyInputStream.readHeader(SnappyInputStream.java:88)
> at org.xerial.snappy.SnappyInputStream.<init>(SnappyInputStream.java:58)
> at org.apache.spark.io.SnappyCompressionCodec.compressedInputStream(CompressionCodec.scala:128)
> at org.apache.spark.broadcast.TorrentBroadcast$.unBlockifyObject(TorrentBroadcast.scala:216)
> at org.apache.spark.broadcast.TorrentBroadcast.readObject(TorrentBroadcast.scala:170)
> at sun.reflect.GeneratedMethodAccessor92.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
> at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:62)
> at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:87)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:164)
> 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)
> {code}
> SPARK-3630 is an umbrella ticket for investigating all causes of these Kryo and Snappy deserialization errors. This ticket is for a more narrowly-focused exploration of the TorrentBroadcast version of these errors, since the similar errors that we've seen in sort-based shuffle seem to be explained by a different cause (see SPARK-3948).
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