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https://issues.apache.org/jira/browse/SPARK-6010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14336796#comment-14336796
]
Apache Spark commented on SPARK-6010:
-------------------------------------
User 'liancheng' has created a pull request for this issue:
https://github.com/apache/spark/pull/4768
> Exception thrown when reading Spark SQL generated Parquet files with
> different but compatible schemas
> -----------------------------------------------------------------------------------------------------
>
> Key: SPARK-6010
> URL: https://issues.apache.org/jira/browse/SPARK-6010
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.3.0
> Reporter: Cheng Lian
> Assignee: Cheng Lian
> Priority: Blocker
>
> The following test case added in {{ParquetPartitionDiscoverySuite}} can be
> used to reproduce this issue:
> {code}
> test("read partitioned table - merging compatible schemas") {
> withTempDir { base =>
> makeParquetFile(
> (1 to 10).map(i => Tuple1(i)).toDF("intField"),
> makePartitionDir(base, defaultPartitionName, "pi" -> 1))
> makeParquetFile(
> (1 to 10).map(i => (i, i.toString)).toDF("intField", "stringField"),
> makePartitionDir(base, defaultPartitionName, "pi" -> 2))
> load(base.getCanonicalPath,
> "org.apache.spark.sql.parquet").registerTempTable("t")
> withTempTable("t") {
> checkAnswer(
> sql("SELECT * FROM t"),
> (1 to 10).map(i => Row(i, null, 1)) ++ (1 to 10).map(i => Row(i,
> i.toString, 2)))
> }
> }
> }
> {code}
> Exception thrown:
> {code}
> [info] java.lang.RuntimeException: could not merge metadata: key
> org.apache.spark.sql.parquet.row.metadata has conflicting values:
> [{"type":"struct","fields":[{"name":"intField","type":"integer","nullable":false,"metadata":{}},{"name":"stringField","type":"string","nullable":true,"metadata":{}}]},
>
> {"type":"struct","fields":[{"name":"intField","type":"integer","nullable":false,"metadata":{}}]}]
> [info] at
> parquet.hadoop.api.InitContext.getMergedKeyValueMetaData(InitContext.java:67)
> [info] at parquet.hadoop.api.ReadSupport.init(ReadSupport.java:84)
> [info] at
> org.apache.spark.sql.parquet.FilteringParquetRowInputFormat.getSplits(ParquetTableOperations.scala:484)
> [info] at
> parquet.hadoop.ParquetInputFormat.getSplits(ParquetInputFormat.java:245)
> [info] at
> org.apache.spark.sql.parquet.ParquetRelation2$$anon$1.getPartitions(newParquet.scala:461)
> [info] at
> org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
> [info] at
> org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
> [info] at scala.Option.getOrElse(Option.scala:120)
> [info] at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
> [info] at
> org.apache.spark.rdd.NewHadoopRDD$NewHadoopMapPartitionsWithSplitRDD.getPartitions(NewHadoopRDD.scala:239)
> [info] at
> org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
> [info] at
> org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
> [info] at scala.Option.getOrElse(Option.scala:120)
> [info] at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
> [info] at
> org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:32)
> [info] at
> org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
> [info] at
> org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
> [info] at scala.Option.getOrElse(Option.scala:120)
> [info] at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
> [info] at
> org.apache.spark.SparkContext.runJob(SparkContext.scala:1518)
> [info] at org.apache.spark.rdd.RDD.collect(RDD.scala:813)
> [info] at
> org.apache.spark.sql.execution.SparkPlan.executeCollect(SparkPlan.scala:83)
> [info] at org.apache.spark.sql.DataFrame.collect(DataFrame.scala:790)
> [info] at
> org.apache.spark.sql.QueryTest$.checkAnswer(QueryTest.scala:115)
> [info] at
> org.apache.spark.sql.QueryTest.checkAnswer(QueryTest.scala:60)
> [info] at
> org.apache.spark.sql.parquet.ParquetPartitionDiscoverySuite$$anonfun$8$$anonfun$apply$mcV$sp$18$$anonfun$apply$8.apply$mcV$sp(ParquetPartitionDiscoverySuite.scala:337)
> [info] at
> org.apache.spark.sql.parquet.ParquetTest$class.withTempTable(ParquetTest.scala:112)
> [info] at
> org.apache.spark.sql.parquet.ParquetPartitionDiscoverySuite.withTempTable(ParquetPartitionDiscoverySuite.scala:35)
> [info] at
> org.apache.spark.sql.parquet.ParquetPartitionDiscoverySuite$$anonfun$8$$anonfun$apply$mcV$sp$18.apply(ParquetPartitionDiscoverySuite.scala:336)
> [info] at
> org.apache.spark.sql.parquet.ParquetPartitionDiscoverySuite$$anonfun$8$$anonfun$apply$mcV$sp$18.apply(ParquetPartitionDiscoverySuite.scala:325)
> [info] at
> org.apache.spark.sql.parquet.ParquetTest$class.withTempDir(ParquetTest.scala:82)
> [info] at
> org.apache.spark.sql.parquet.ParquetPartitionDiscoverySuite.withTempDir(ParquetPartitionDiscoverySuite.scala:35)
> [info] at
> org.apache.spark.sql.parquet.ParquetPartitionDiscoverySuite$$anonfun$8.apply$mcV$sp(ParquetPartitionDiscoverySuite.scala:325)
> [info] at
> org.apache.spark.sql.parquet.ParquetPartitionDiscoverySuite$$anonfun$8.apply(ParquetPartitionDiscoverySuite.scala:325)
> [info] at
> org.apache.spark.sql.parquet.ParquetPartitionDiscoverySuite$$anonfun$8.apply(ParquetPartitionDiscoverySuite.scala:325)
> [info] at
> org.scalatest.Transformer$$anonfun$apply$1.apply$mcV$sp(Transformer.scala:22)
> [info] at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
> [info] at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
> [info] at org.scalatest.Transformer.apply(Transformer.scala:22)
> [info] at org.scalatest.Transformer.apply(Transformer.scala:20)
> [info] at
> org.scalatest.FunSuiteLike$$anon$1.apply(FunSuiteLike.scala:166)
> [info] at org.scalatest.Suite$class.withFixture(Suite.scala:1122)
> [info] at org.scalatest.FunSuite.withFixture(FunSuite.scala:1555)
> [info] at
> org.scalatest.FunSuiteLike$class.invokeWithFixture$1(FunSuiteLike.scala:163)
> [info] at
> org.scalatest.FunSuiteLike$$anonfun$runTest$1.apply(FunSuiteLike.scala:175)
> [info] at
> org.scalatest.FunSuiteLike$$anonfun$runTest$1.apply(FunSuiteLike.scala:175)
> [info] at org.scalatest.SuperEngine.runTestImpl(Engine.scala:306)
> [info] at
> org.scalatest.FunSuiteLike$class.runTest(FunSuiteLike.scala:175)
> [info] at org.scalatest.FunSuite.runTest(FunSuite.scala:1555)
> [info] at
> org.scalatest.FunSuiteLike$$anonfun$runTests$1.apply(FunSuiteLike.scala:208)
> [info] at
> org.scalatest.FunSuiteLike$$anonfun$runTests$1.apply(FunSuiteLike.scala:208)
> [info] at
> org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:413)
> [info] at
> org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:401)
> [info] at scala.collection.immutable.List.foreach(List.scala:318)
> [info] at
> org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:401)
> [info] at
> org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch(Engine.scala:396)
> [info] at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:483)
> [info] at
> org.scalatest.FunSuiteLike$class.runTests(FunSuiteLike.scala:208)
> [info] at org.scalatest.FunSuite.runTests(FunSuite.scala:1555)
> [info] at org.scalatest.Suite$class.run(Suite.scala:1424)
> [info] at
> org.scalatest.FunSuite.org$scalatest$FunSuiteLike$$super$run(FunSuite.scala:1555)
> [info] at
> org.scalatest.FunSuiteLike$$anonfun$run$1.apply(FunSuiteLike.scala:212)
> [info] at
> org.scalatest.FunSuiteLike$$anonfun$run$1.apply(FunSuiteLike.scala:212)
> [info] at org.scalatest.SuperEngine.runImpl(Engine.scala:545)
> [info] at
> org.scalatest.FunSuiteLike$class.run(FunSuiteLike.scala:212)
> [info] at org.scalatest.FunSuite.run(FunSuite.scala:1555)
> [info] at
> org.scalatest.tools.Framework.org$scalatest$tools$Framework$$runSuite(Framework.scala:462)
> [info] at
> org.scalatest.tools.Framework$ScalaTestTask.execute(Framework.scala:671)
> [info] at sbt.ForkMain$Run$2.call(ForkMain.java:294)
> [info] at sbt.ForkMain$Run$2.call(ForkMain.java:284)
> [info] at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> [info] at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> [info] at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> [info] at java.lang.Thread.run(Thread.java:745) (QueryTest.scala:61)
> {code}
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