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https://issues.apache.org/jira/browse/SPARK-12319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15066628#comment-15066628
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Tim Preece commented on SPARK-12319:
------------------------------------
I notice for the failing testcase the schema ( for row1) mismatches the actual
data in row1.
Row1 has schema:
SpecificUnsafeRowJoiner schema1
StructType(StructField(a,IntegerType,false), StructField(b,StringType,true))
But row 1 has the following data ( i.e. a string followed by int )
row1 [0,1800000003,1,656e6f]
So why doesn't the schema mismatch the data?
The name of the failing test may give a clue!
test("typed aggregation: class input with reordering") {
val ds = sql("SELECT 'one' AS b, 1 as a").as[AggData]
checkAnswer(
ds.select(ClassInputAgg.toColumn),
1)
checkAnswer(
ds.select(expr("avg(a)").as[Double], ClassInputAgg.toColumn),
(1.0, 1))
checkAnswer(
ds.groupBy(_.b).agg(ClassInputAgg.toColumn),
("one", 1))
}
> Address endian specific problems surfaced in 1.6
> ------------------------------------------------
>
> Key: SPARK-12319
> URL: https://issues.apache.org/jira/browse/SPARK-12319
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.6.0
> Environment: Problems apparent on BE, LE could be impacted too
> Reporter: Adam Roberts
> Priority: Critical
>
> JIRA to cover endian specific problems - since testing 1.6 I've noticed
> problems with DataFrames on BE platforms, e.g.
> https://issues.apache.org/jira/browse/SPARK-9858
> [~joshrosen] [~yhuai]
> Current progress: using com.google.common.io.LittleEndianDataInputStream and
> com.google.common.io.LittleEndianDataOutputStream within UnsafeRowSerializer
> fixes three test failures in ExchangeCoordinatorSuite but I'm concerned
> around performance/wider functional implications
> "org.apache.spark.sql.DatasetAggregatorSuite.typed aggregation: class input
> with reordering" fails as we expect "one, 1" but instead get "one, 9" - we
> believe the issue lies within BitSetMethods.java, specifically around: return
> (wi << 6) + subIndex + java.lang.Long.numberOfTrailingZeros(word);
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