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Posted to issues@spark.apache.org by "Steve Drew (JIRA)" <ji...@apache.org> on 2017/08/09 16:27:00 UTC
[jira] [Commented] (SPARK-17557) SQL query on parquet table
java.lang.UnsupportedOperationException:
org.apache.parquet.column.values.dictionary.PlainValuesDictionary
[ https://issues.apache.org/jira/browse/SPARK-17557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16120181#comment-16120181 ]
Steve Drew commented on SPARK-17557:
------------------------------------
Hi,
This issue is still happening (spark 2.1.1). Hopefully this provides better repro-steps.
We create a folder daily in an S3 bucket under meta-data/ec where we store event counts at a grain level, to be aggregated up as needed. Somewhere over the past 6 months, the dev made a code change that changed the data type of one of the columns stored there. However, when I try to read one day using a where clause, the error referenced above occurs.
spark.read.parquet("s3://my-bucket/meta-data/ec/").*where("td='07-31-2017'")*.groupBy("dataClass","dt","event_type","clientVersion").agg(sum("crow").as("crow")).coalesce(1).write.option("header","true").csv("s3://mya-disco-out/csv/PRR731/")
There are two work-arounds that seem to work.
#1 - filter by the specific folder if you only need one within your path:
spark.read.parquet("s3://my-bucket/meta-data/ec*/td=07-31-2017/*").groupBy("dataClass","dt","event_type","clientVersion").agg(sum("crow").as("crow")).coalesce(1).write.option("header","true").csv("s3://mya-disco-out/csv/PRR731/")
#2 - apply a schema manually:
val schema = StructType(scala.Array(
StructField("folder",StringType,false),
StructField("dataClass",StringType,false),
StructField("dt",StringType,false),
StructField("parentEvent",StringType,false),
StructField("eventSuperClass",StringType,false),
StructField("event_type",StringType,false),
StructField("piifield0", StringType, false),
StructField("piifield1",StringType,false),
StructField("piifield2",StringType,false),
StructField("piifield3",StringType,false),
StructField("piifield4",StringType,false),
StructField("crow",LongType,false)
))
(where crow WAS an "int" for some days and became a "long" "a long" the way.)
spark.read*.schema(schema)*.parquet("s3://my-bucket/meta-data/ec/").where("td='07-31-2017'").groupBy("dataClass","dt","event_type","clientVersion").agg(sum("crow").as("crow")).coalesce(1).write.option("header","true").csv("s3://output-path/")
Steve
> SQL query on parquet table java.lang.UnsupportedOperationException: org.apache.parquet.column.values.dictionary.PlainValuesDictionary
> -------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-17557
> URL: https://issues.apache.org/jira/browse/SPARK-17557
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Egor Pahomov
>
> Working on 1.6.2, broken on 2.0
> {code}
> select * from logs.a where year=2016 and month=9 and day=14 limit 100
> {code}
> {code}
> java.lang.UnsupportedOperationException: org.apache.parquet.column.values.dictionary.PlainValuesDictionary$PlainBinaryDictionary
> at org.apache.parquet.column.Dictionary.decodeToInt(Dictionary.java:48)
> at org.apache.spark.sql.execution.vectorized.OnHeapColumnVector.getInt(OnHeapColumnVector.java:233)
> at org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown Source)
> at org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
> at org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$8$$anon$1.hasNext(WholeStageCodegenExec.scala:370)
> at org.apache.spark.sql.execution.SparkPlan$$anonfun$4.apply(SparkPlan.scala:246)
> at org.apache.spark.sql.execution.SparkPlan$$anonfun$4.apply(SparkPlan.scala:240)
> at org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$24.apply(RDD.scala:803)
> at org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$24.apply(RDD.scala:803)
> at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
> at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:319)
> at org.apache.spark.rdd.RDD.iterator(RDD.scala:283)
> at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
> at org.apache.spark.scheduler.Task.run(Task.scala:86)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> {code}
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