[ 
https://issues.apache.org/jira/browse/HADOOP-14204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15932911#comment-15932911
 ] 

Steve Loughran commented on HADOOP-14204:
-----------------------------------------

Stack. This is my github cloud examples running with Spark master built against 
hadoop-2.8.0 RC3

{code}
   org.apache.spark.SparkException: Job aborted.
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1.apply$mcV$sp(FileFormatWriter.scala:196)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1.apply(FileFormatWriter.scala:161)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1.apply(FileFormatWriter.scala:161)
      at 
org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId(SQLExecution.scala:65)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$.write(FileFormatWriter.scala:161)
      at 
org.apache.spark.sql.execution.datasources.InsertIntoHadoopFsRelationCommand.run(InsertIntoHadoopFsRelationCommand.scala:137)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult$lzycompute(commands.scala:58)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult(commands.scala:56)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.doExecute(commands.scala:74)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$executeQuery$1.apply(SparkPlan.scala:135)
      at 
org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
      at 
org.apache.spark.sql.execution.SparkPlan.executeQuery(SparkPlan.scala:132)
      at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:113)
      at 
org.apache.spark.sql.execution.QueryExecution.toRdd$lzycompute(QueryExecution.scala:93)
      at 
org.apache.spark.sql.execution.QueryExecution.toRdd(QueryExecution.scala:93)
      at 
org.apache.spark.sql.execution.datasources.DataSource.writeInFileFormat(DataSource.scala:442)
      at 
org.apache.spark.sql.execution.datasources.DataSource.write(DataSource.scala:478)
      at 
org.apache.spark.sql.execution.datasources.SaveIntoDataSourceCommand.run(SaveIntoDataSourceCommand.scala:48)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult$lzycompute(commands.scala:58)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult(commands.scala:56)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.doExecute(commands.scala:74)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$executeQuery$1.apply(SparkPlan.scala:135)
      at 
org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
      at 
org.apache.spark.sql.execution.SparkPlan.executeQuery(SparkPlan.scala:132)
      at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:113)
      at 
org.apache.spark.sql.execution.QueryExecution.toRdd$lzycompute(QueryExecution.scala:93)
      at 
org.apache.spark.sql.execution.QueryExecution.toRdd(QueryExecution.scala:93)
      at 
org.apache.spark.sql.DataFrameWriter.runCommand(DataFrameWriter.scala:606)
      at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:233)
      at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:217)
      at org.apache.spark.sql.DataFrameWriter.parquet(DataFrameWriter.scala:509)
      at 
com.hortonworks.spark.cloud.examples.S3DataFrameExample.action(S3DataFrameExample.scala:160)
      at 
com.hortonworks.spark.cloud.ObjectStoreExample$class.action(ObjectStoreExample.scala:67)
      at 
com.hortonworks.spark.cloud.examples.S3DataFrameExample.action(S3DataFrameExample.scala:56)
      at 
com.hortonworks.spark.cloud.examples.S3DataFrameExampleSuite$$anonfun$2.apply$mcV$sp(S3DataFrameExampleSuite.scala:47)
      at 
com.hortonworks.spark.cloud.CloudSuite$$anonfun$ctest$1.apply$mcV$sp(CloudSuite.scala:133)
      at 
com.hortonworks.spark.cloud.CloudSuite$$anonfun$ctest$1.apply(CloudSuite.scala:131)
      at 
com.hortonworks.spark.cloud.CloudSuite$$anonfun$ctest$1.apply(CloudSuite.scala:131)
      at 
org.scalatest.Transformer$$anonfun$apply$1.apply$mcV$sp(Transformer.scala:22)
      at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
      at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
      at org.scalatest.Transformer.apply(Transformer.scala:22)
      at org.scalatest.Transformer.apply(Transformer.scala:20)
      at org.scalatest.FunSuiteLike$$anon$1.apply(FunSuiteLike.scala:166)
      at org.scalatest.Suite$class.withFixture(Suite.scala:1122)
      at org.scalatest.FunSuite.withFixture(FunSuite.scala:1555)
      at 
org.scalatest.FunSuiteLike$class.invokeWithFixture$1(FunSuiteLike.scala:163)
      at 
org.scalatest.FunSuiteLike$$anonfun$runTest$1.apply(FunSuiteLike.scala:175)
      at 
org.scalatest.FunSuiteLike$$anonfun$runTest$1.apply(FunSuiteLike.scala:175)
      at org.scalatest.SuperEngine.runTestImpl(Engine.scala:306)
      at org.scalatest.FunSuiteLike$class.runTest(FunSuiteLike.scala:175)
      at 
com.hortonworks.spark.cloud.CloudSuite.org$scalatest$BeforeAndAfterEach$$super$runTest(CloudSuite.scala:40)
      at 
org.scalatest.BeforeAndAfterEach$class.runTest(BeforeAndAfterEach.scala:255)
      at 
com.hortonworks.spark.cloud.CloudSuite.org$scalatest$BeforeAndAfter$$super$runTest(CloudSuite.scala:40)
      at org.scalatest.BeforeAndAfter$class.runTest(BeforeAndAfter.scala:200)
      at com.hortonworks.spark.cloud.CloudSuite.runTest(CloudSuite.scala:40)
      at 
org.scalatest.FunSuiteLike$$anonfun$runTests$1.apply(FunSuiteLike.scala:208)
      at 
org.scalatest.FunSuiteLike$$anonfun$runTests$1.apply(FunSuiteLike.scala:208)
      at 
org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:413)
      at 
org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:401)
      at scala.collection.immutable.List.foreach(List.scala:381)
      at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:401)
      at 
org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch(Engine.scala:396)
      at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:483)
      at org.scalatest.FunSuiteLike$class.runTests(FunSuiteLike.scala:208)
      at org.scalatest.FunSuite.runTests(FunSuite.scala:1555)
      at org.scalatest.Suite$class.run(Suite.scala:1424)
      at 
org.scalatest.FunSuite.org$scalatest$FunSuiteLike$$super$run(FunSuite.scala:1555)
      at org.scalatest.FunSuiteLike$$anonfun$run$1.apply(FunSuiteLike.scala:212)
      at org.scalatest.FunSuiteLike$$anonfun$run$1.apply(FunSuiteLike.scala:212)
      at org.scalatest.SuperEngine.runImpl(Engine.scala:545)
      at org.scalatest.FunSuiteLike$class.run(FunSuiteLike.scala:212)
      at 
com.hortonworks.spark.cloud.CloudSuite.org$scalatest$BeforeAndAfterAll$$super$run(CloudSuite.scala:40)
      at 
org.scalatest.BeforeAndAfterAll$class.liftedTree1$1(BeforeAndAfterAll.scala:257)
      at org.scalatest.BeforeAndAfterAll$class.run(BeforeAndAfterAll.scala:256)
      at 
com.hortonworks.spark.cloud.CloudSuite.org$scalatest$BeforeAndAfter$$super$run(CloudSuite.scala:40)
      at org.scalatest.BeforeAndAfter$class.run(BeforeAndAfter.scala:241)
      at com.hortonworks.spark.cloud.CloudSuite.run(CloudSuite.scala:40)
      at org.scalatest.Suite$class.callExecuteOnSuite$1(Suite.scala:1492)
      at org.scalatest.Suite$$anonfun$runNestedSuites$1.apply(Suite.scala:1528)
      at org.scalatest.Suite$$anonfun$runNestedSuites$1.apply(Suite.scala:1526)
      at 
scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
      at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
      at org.scalatest.Suite$class.runNestedSuites(Suite.scala:1526)
      at 
org.scalatest.tools.DiscoverySuite.runNestedSuites(DiscoverySuite.scala:29)
      at org.scalatest.Suite$class.run(Suite.scala:1421)
      at org.scalatest.tools.DiscoverySuite.run(DiscoverySuite.scala:29)
      at org.scalatest.tools.SuiteRunner.run(SuiteRunner.scala:55)
      at 
org.scalatest.tools.Runner$$anonfun$doRunRunRunDaDoRunRun$3.apply(Runner.scala:2563)
      at 
org.scalatest.tools.Runner$$anonfun$doRunRunRunDaDoRunRun$3.apply(Runner.scala:2557)
      at scala.collection.immutable.List.foreach(List.scala:381)
      at org.scalatest.tools.Runner$.doRunRunRunDaDoRunRun(Runner.scala:2557)
      at 
org.scalatest.tools.Runner$$anonfun$runOptionallyWithPassFailReporter$2.apply(Runner.scala:1044)
      at 
org.scalatest.tools.Runner$$anonfun$runOptionallyWithPassFailReporter$2.apply(Runner.scala:1043)
      at 
org.scalatest.tools.Runner$.withClassLoaderAndDispatchReporter(Runner.scala:2722)
      at 
org.scalatest.tools.Runner$.runOptionallyWithPassFailReporter(Runner.scala:1043)
      at org.scalatest.tools.Runner$.main(Runner.scala:860)
      at org.scalatest.tools.Runner.main(Runner.scala)
      Cause: org.apache.spark.SparkException: Job aborted due to stage failure: 
Task 0 in stage 1.0 failed 1 times, most recent failure: Lost task 0.0 in stage 
1.0 (TID 1, localhost, executor driver): org.apache.spark.SparkException: Task 
failed while writing rows
        at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$.org$apache$spark$sql$execution$datasources$FileFormatWriter$$executeTask(FileFormatWriter.scala:253)
        at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1$$anonfun$12.apply(FileFormatWriter.scala:178)
        at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1$$anonfun$12.apply(FileFormatWriter.scala:177)
        at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87)
        at org.apache.spark.scheduler.Task.run(Task.scala:108)
        at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:317)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.UnsupportedOperationException
        at java.util.Collections$UnmodifiableList.sort(Collections.java:1331)
        at java.util.Collections.sort(Collections.java:175)
        at 
com.amazonaws.services.s3.model.transform.RequestXmlFactory.convertToXmlByteArray(RequestXmlFactory.java:42)
        at 
com.amazonaws.services.s3.AmazonS3Client.completeMultipartUpload(AmazonS3Client.java:2692)
        at 
org.apache.hadoop.fs.s3a.S3AFileSystem$WriteOperationHelper.completeMultipartUpload(S3AFileSystem.java:2298)
        at 
org.apache.hadoop.fs.s3a.S3ABlockOutputStream$MultiPartUpload.complete(S3ABlockOutputStream.java:561)
        at 
org.apache.hadoop.fs.s3a.S3ABlockOutputStream$MultiPartUpload.access$200(S3ABlockOutputStream.java:454)
        at 
org.apache.hadoop.fs.s3a.S3ABlockOutputStream.close(S3ABlockOutputStream.java:352)
        at 
org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:72)
        at 
org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:106)
        at 
org.apache.parquet.hadoop.ParquetFileWriter.end(ParquetFileWriter.java:639)
        at 
org.apache.parquet.hadoop.InternalParquetRecordWriter.close(InternalParquetRecordWriter.java:117)
        at 
org.apache.parquet.hadoop.ParquetRecordWriter.close(ParquetRecordWriter.java:163)
        at 
org.apache.spark.sql.execution.datasources.parquet.ParquetOutputWriter.close(ParquetOutputWriter.scala:42)
        at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$SingleDirectoryWriteTask.releaseResources(FileFormatWriter.scala:317)
        at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$SingleDirectoryWriteTask.execute(FileFormatWriter.scala:311)
        at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$org$apache$spark$sql$execution$datasources$FileFormatWriter$$executeTask$3.apply(FileFormatWriter.scala:239)
        at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$org$apache$spark$sql$execution$datasources$FileFormatWriter$$executeTask$3.apply(FileFormatWriter.scala:237)
        at 
org.apache.spark.util.Utils$.tryWithSafeFinallyAndFailureCallbacks(Utils.scala:1360)
        at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$.org$apache$spark$sql$execution$datasources$FileFormatWriter$$executeTask(FileFormatWriter.scala:242)
        ... 8 more
        Suppressed: java.lang.NullPointerException
                at 
org.apache.parquet.hadoop.InternalParquetRecordWriter.flushRowGroupToStore(InternalParquetRecordWriter.java:160)
                at 
org.apache.parquet.hadoop.InternalParquetRecordWriter.close(InternalParquetRecordWriter.java:109)
                at 
org.apache.parquet.hadoop.ParquetRecordWriter.close(ParquetRecordWriter.java:163)
                at 
org.apache.spark.sql.execution.datasources.parquet.ParquetOutputWriter.close(ParquetOutputWriter.scala:42)
                at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$SingleDirectoryWriteTask.releaseResources(FileFormatWriter.scala:317)
                at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$org$apache$spark$sql$execution$datasources$FileFormatWriter$$executeTask$1.apply$mcV$sp(FileFormatWriter.scala:245)
                at 
org.apache.spark.util.Utils$.tryWithSafeFinallyAndFailureCallbacks(Utils.scala:1369)
                ... 9 more

Driver stacktrace:
      at 
org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1495)
      at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1483)
      at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1482)
      at 
scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
      at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
      at 
org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1482)
      at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:810)
      at 
org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:810)
      at scala.Option.foreach(Option.scala:257)
      at 
org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:810)
      at 
org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1710)
      at 
org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1665)
      at 
org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1654)
      at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)
      at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:635)
      at org.apache.spark.SparkContext.runJob(SparkContext.scala:2019)
      at org.apache.spark.SparkContext.runJob(SparkContext.scala:2040)
      at org.apache.spark.SparkContext.runJob(SparkContext.scala:2072)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1.apply$mcV$sp(FileFormatWriter.scala:176)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1.apply(FileFormatWriter.scala:161)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1.apply(FileFormatWriter.scala:161)
      at 
org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId(SQLExecution.scala:65)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$.write(FileFormatWriter.scala:161)
      at 
org.apache.spark.sql.execution.datasources.InsertIntoHadoopFsRelationCommand.run(InsertIntoHadoopFsRelationCommand.scala:137)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult$lzycompute(commands.scala:58)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult(commands.scala:56)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.doExecute(commands.scala:74)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$executeQuery$1.apply(SparkPlan.scala:135)
      at 
org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
      at 
org.apache.spark.sql.execution.SparkPlan.executeQuery(SparkPlan.scala:132)
      at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:113)
      at 
org.apache.spark.sql.execution.QueryExecution.toRdd$lzycompute(QueryExecution.scala:93)
      at 
org.apache.spark.sql.execution.QueryExecution.toRdd(QueryExecution.scala:93)
      at 
org.apache.spark.sql.execution.datasources.DataSource.writeInFileFormat(DataSource.scala:442)
      at 
org.apache.spark.sql.execution.datasources.DataSource.write(DataSource.scala:478)
      at 
org.apache.spark.sql.execution.datasources.SaveIntoDataSourceCommand.run(SaveIntoDataSourceCommand.scala:48)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult$lzycompute(commands.scala:58)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult(commands.scala:56)
      at 
org.apache.spark.sql.execution.command.ExecutedCommandExec.doExecute(commands.scala:74)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
      at 
org.apache.spark.sql.execution.SparkPlan$$anonfun$executeQuery$1.apply(SparkPlan.scala:135)
      at 
org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
      at 
org.apache.spark.sql.execution.SparkPlan.executeQuery(SparkPlan.scala:132)
      at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:113)
      at 
org.apache.spark.sql.execution.QueryExecution.toRdd$lzycompute(QueryExecution.scala:93)
      at 
org.apache.spark.sql.execution.QueryExecution.toRdd(QueryExecution.scala:93)
      at 
org.apache.spark.sql.DataFrameWriter.runCommand(DataFrameWriter.scala:606)
      at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:233)
      at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:217)
      at org.apache.spark.sql.DataFrameWriter.parquet(DataFrameWriter.scala:509)
      at 
com.hortonworks.spark.cloud.examples.S3DataFrameExample.action(S3DataFrameExample.scala:160)
      at 
com.hortonworks.spark.cloud.ObjectStoreExample$class.action(ObjectStoreExample.scala:67)
      at 
com.hortonworks.spark.cloud.examples.S3DataFrameExample.action(S3DataFrameExample.scala:56)
      at 
com.hortonworks.spark.cloud.examples.S3DataFrameExampleSuite$$anonfun$2.apply$mcV$sp(S3DataFrameExampleSuite.scala:47)
      at 
com.hortonworks.spark.cloud.CloudSuite$$anonfun$ctest$1.apply$mcV$sp(CloudSuite.scala:133)
      at 
com.hortonworks.spark.cloud.CloudSuite$$anonfun$ctest$1.apply(CloudSuite.scala:131)
      at 
com.hortonworks.spark.cloud.CloudSuite$$anonfun$ctest$1.apply(CloudSuite.scala:131)
      at 
org.scalatest.Transformer$$anonfun$apply$1.apply$mcV$sp(Transformer.scala:22)
      at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
      at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
      at org.scalatest.Transformer.apply(Transformer.scala:22)
      at org.scalatest.Transformer.apply(Transformer.scala:20)
      at org.scalatest.FunSuiteLike$$anon$1.apply(FunSuiteLike.scala:166)
      at org.scalatest.Suite$class.withFixture(Suite.scala:1122)
      at org.scalatest.FunSuite.withFixture(FunSuite.scala:1555)
      at 
org.scalatest.FunSuiteLike$class.invokeWithFixture$1(FunSuiteLike.scala:163)
      at 
org.scalatest.FunSuiteLike$$anonfun$runTest$1.apply(FunSuiteLike.scala:175)
      at 
org.scalatest.FunSuiteLike$$anonfun$runTest$1.apply(FunSuiteLike.scala:175)
      at org.scalatest.SuperEngine.runTestImpl(Engine.scala:306)
      at org.scalatest.FunSuiteLike$class.runTest(FunSuiteLike.scala:175)
      at 
com.hortonworks.spark.cloud.CloudSuite.org$scalatest$BeforeAndAfterEach$$super$runTest(CloudSuite.scala:40)
      at 
org.scalatest.BeforeAndAfterEach$class.runTest(BeforeAndAfterEach.scala:255)
      at 
com.hortonworks.spark.cloud.CloudSuite.org$scalatest$BeforeAndAfter$$super$runTest(CloudSuite.scala:40)
      at org.scalatest.BeforeAndAfter$class.runTest(BeforeAndAfter.scala:200)
      at com.hortonworks.spark.cloud.CloudSuite.runTest(CloudSuite.scala:40)
      at 
org.scalatest.FunSuiteLike$$anonfun$runTests$1.apply(FunSuiteLike.scala:208)
      at 
org.scalatest.FunSuiteLike$$anonfun$runTests$1.apply(FunSuiteLike.scala:208)
      at 
org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:413)
      at 
org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:401)
      at scala.collection.immutable.List.foreach(List.scala:381)
      at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:401)
      at 
org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch(Engine.scala:396)
      at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:483)
      at org.scalatest.FunSuiteLike$class.runTests(FunSuiteLike.scala:208)
      at org.scalatest.FunSuite.runTests(FunSuite.scala:1555)
      at org.scalatest.Suite$class.run(Suite.scala:1424)
      at 
org.scalatest.FunSuite.org$scalatest$FunSuiteLike$$super$run(FunSuite.scala:1555)
      at org.scalatest.FunSuiteLike$$anonfun$run$1.apply(FunSuiteLike.scala:212)
      at org.scalatest.FunSuiteLike$$anonfun$run$1.apply(FunSuiteLike.scala:212)
      at org.scalatest.SuperEngine.runImpl(Engine.scala:545)
      at org.scalatest.FunSuiteLike$class.run(FunSuiteLike.scala:212)
      at 
com.hortonworks.spark.cloud.CloudSuite.org$scalatest$BeforeAndAfterAll$$super$run(CloudSuite.scala:40)
      at 
org.scalatest.BeforeAndAfterAll$class.liftedTree1$1(BeforeAndAfterAll.scala:257)
      at org.scalatest.BeforeAndAfterAll$class.run(BeforeAndAfterAll.scala:256)
      at 
com.hortonworks.spark.cloud.CloudSuite.org$scalatest$BeforeAndAfter$$super$run(CloudSuite.scala:40)
      at org.scalatest.BeforeAndAfter$class.run(BeforeAndAfter.scala:241)
      at com.hortonworks.spark.cloud.CloudSuite.run(CloudSuite.scala:40)
      at org.scalatest.Suite$class.callExecuteOnSuite$1(Suite.scala:1492)
      at org.scalatest.Suite$$anonfun$runNestedSuites$1.apply(Suite.scala:1528)
      at org.scalatest.Suite$$anonfun$runNestedSuites$1.apply(Suite.scala:1526)
      at 
scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
      at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
      at org.scalatest.Suite$class.runNestedSuites(Suite.scala:1526)
      at 
org.scalatest.tools.DiscoverySuite.runNestedSuites(DiscoverySuite.scala:29)
      at org.scalatest.Suite$class.run(Suite.scala:1421)
      at org.scalatest.tools.DiscoverySuite.run(DiscoverySuite.scala:29)
      at org.scalatest.tools.SuiteRunner.run(SuiteRunner.scala:55)
      at 
org.scalatest.tools.Runner$$anonfun$doRunRunRunDaDoRunRun$3.apply(Runner.scala:2563)
      at 
org.scalatest.tools.Runner$$anonfun$doRunRunRunDaDoRunRun$3.apply(Runner.scala:2557)
      at scala.collection.immutable.List.foreach(List.scala:381)
      at org.scalatest.tools.Runner$.doRunRunRunDaDoRunRun(Runner.scala:2557)
      at 
org.scalatest.tools.Runner$$anonfun$runOptionallyWithPassFailReporter$2.apply(Runner.scala:1044)
      at 
org.scalatest.tools.Runner$$anonfun$runOptionallyWithPassFailReporter$2.apply(Runner.scala:1043)
      at 
org.scalatest.tools.Runner$.withClassLoaderAndDispatchReporter(Runner.scala:2722)
      at 
org.scalatest.tools.Runner$.runOptionallyWithPassFailReporter(Runner.scala:1043)
      at org.scalatest.tools.Runner$.main(Runner.scala:860)
      at org.scalatest.tools.Runner.main(Runner.scala)
      Cause: org.apache.spark.SparkException: Task failed while writing rows
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$.org$apache$spark$sql$execution$datasources$FileFormatWriter$$executeTask(FileFormatWriter.scala:253)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1$$anonfun$12.apply(FileFormatWriter.scala:178)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1$$anonfun$12.apply(FileFormatWriter.scala:177)
      at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87)
      at org.apache.spark.scheduler.Task.run(Task.scala:108)
      at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:317)
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      at java.lang.Thread.run(Thread.java:745)
      Cause: java.lang.UnsupportedOperationException
      at java.util.Collections$UnmodifiableList.sort(Collections.java:1331)
      at java.util.Collections.sort(Collections.java:175)
      at 
com.amazonaws.services.s3.model.transform.RequestXmlFactory.convertToXmlByteArray(RequestXmlFactory.java:42)
      at 
com.amazonaws.services.s3.AmazonS3Client.completeMultipartUpload(AmazonS3Client.java:2692)
      at 
org.apache.hadoop.fs.s3a.S3AFileSystem$WriteOperationHelper.completeMultipartUpload(S3AFileSystem.java:2298)
      at 
org.apache.hadoop.fs.s3a.S3ABlockOutputStream$MultiPartUpload.complete(S3ABlockOutputStream.java:561)
      at 
org.apache.hadoop.fs.s3a.S3ABlockOutputStream$MultiPartUpload.access$200(S3ABlockOutputStream.java:454)
      at 
org.apache.hadoop.fs.s3a.S3ABlockOutputStream.close(S3ABlockOutputStream.java:352)
      at 
org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:72)
      at 
org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:106)
      at 
org.apache.parquet.hadoop.ParquetFileWriter.end(ParquetFileWriter.java:639)
      at 
org.apache.parquet.hadoop.InternalParquetRecordWriter.close(InternalParquetRecordWriter.java:117)
      at 
org.apache.parquet.hadoop.ParquetRecordWriter.close(ParquetRecordWriter.java:163)
      at 
org.apache.spark.sql.execution.datasources.parquet.ParquetOutputWriter.close(ParquetOutputWriter.scala:42)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$SingleDirectoryWriteTask.releaseResources(FileFormatWriter.scala:317)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$SingleDirectoryWriteTask.execute(FileFormatWriter.scala:311)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$org$apache$spark$sql$execution$datasources$FileFormatWriter$$executeTask$3.apply(FileFormatWriter.scala:239)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$org$apache$spark$sql$execution$datasources$FileFormatWriter$$executeTask$3.apply(FileFormatWriter.scala:237)
      at 
org.apache.spark.util.Utils$.tryWithSafeFinallyAndFailureCallbacks(Utils.scala:1360)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$.org$apache$spark$sql$execution$datasources$FileFormatWriter$$executeTask(FileFormatWriter.scala:242)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1$$anonfun$12.apply(FileFormatWriter.scala:178)
      at 
org.apache.spark.sql.execution.datasources.FileFormatWriter$$anonfun$write$1$$anonfun$12.apply(FileFormatWriter.scala:177)
      at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87)
      at org.apache.spark.scheduler.Task.run(Task.scala:108)
      at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:317)
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      at java.lang.Thread.run(Thread.java:745)
{code}

> S3A multipart commit failing, "UnsupportedOperationException at 
> java.util.Collections$UnmodifiableList.sort"
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-14204
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14204
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs/s3
>    Affects Versions: 2.8.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Critical
>
> Stack trace seen trying to commit a multipart upload, as the EMR code (which 
> takes a {{List<String> etags}} is trying to sort that list directly, which it 
> can't do if the list doesn't want to be sorted.
> later versions of the SDK clone the list before sorting.
> We need to make sure that the list passed in can be sorted.



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