[jira] [Commented] (SPARK-3630) Identify cause of Kryo+Snappy PARSING_ERROR

["SuYan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-3630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15363871#comment-15363871 ] 

SuYan commented on SPARK-3630:
------------------------------

1. snappy 1.0.4.1 + Kryo + spark 1.6.1 ----------> throw Parsing_error
2. snappy 1.0.4.1  without Kryo + spark 1.6.1 --------> OK
3. snappy 1.1.2 + Kryo + spark 1.6.1 ------------> OK

to be mention, the data have some record with millions values. if filter that records, it will work fine.  and Snappy 1.0.4.1 not use cachedBuffer.

> Identify cause of Kryo+Snappy PARSING_ERROR
> -------------------------------------------
>
>                 Key: SPARK-3630
>                 URL: https://issues.apache.org/jira/browse/SPARK-3630
>             Project: Spark
>          Issue Type: Task
>          Components: Spark Core
>    Affects Versions: 1.1.0, 1.2.0
>            Reporter: Andrew Ash
>            Assignee: Josh Rosen
>
> A recent GraphX commit caused non-deterministic exceptions in unit tests so it was reverted (see SPARK-3400).
> Separately, [~aash] observed the same exception stacktrace in an application-specific Kryo registrator:
> {noformat}
> com.esotericsoftware.kryo.KryoException: java.io.IOException: failed to uncompress the chunk: PARSING_ERROR(2)
> com.esotericsoftware.kryo.io.Input.fill(Input.java:142) com.esotericsoftware.kryo.io.Input.require(Input.java:169) 
> com.esotericsoftware.kryo.io.Input.readInt(Input.java:325) com.esotericsoftware.kryo.io.Input.readFloat(Input.java:624) 
> com.esotericsoftware.kryo.serializers.DefaultSerializers$FloatSerializer.read(DefaultSerializers.java:127) 
> com.esotericsoftware.kryo.serializers.DefaultSerializers$FloatSerializer.read(DefaultSerializers.java:117) 
> com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:732) 
> com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:109) 
> com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:18) 
> com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:732)
> ...
> {noformat}
> This ticket is to identify the cause of the exception in the GraphX commit so the faulty commit can be fixed and merged back into master.



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