Yin Huai created SPARK-12055:
--------------------------------
Summary: TimSort failing with error when writing a partitioned
data set
Key: SPARK-12055
URL: https://issues.apache.org/jira/browse/SPARK-12055
Project: Spark
Issue Type: Bug
Components: SQL
Reporter: Yin Huai
Priority: Blocker
When we need to sort rows based on partitioning columns within a task, timsort
somehow failed. I do not know what is the cause. The only thing I know right
now is that the partitioning columns are three string columns.
{code}
org.apache.spark.SparkException: Task failed while writing rows.
at
org.apache.spark.sql.execution.datasources.DynamicPartitionWriterContainer.writeRows(WriterContainer.scala:396)
at
org.apache.spark.sql.execution.datasources.InsertIntoHadoopFsRelation$$anonfun$run$1$$anonfun$apply$mcV$sp$3.apply(InsertIntoHadoopFsRelation.scala:150)
at
org.apache.spark.sql.execution.datasources.InsertIntoHadoopFsRelation$$anonfun$run$1$$anonfun$apply$mcV$sp$3.apply(InsertIntoHadoopFsRelation.scala:150)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
at org.apache.spark.scheduler.Task.run(Task.scala:88)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Comparison method violates its
general contract!
at org.apache.spark.util.collection.TimSort$SortState.mergeLo(TimSort.java:794)
at org.apache.spark.util.collection.TimSort$SortState.mergeAt(TimSort.java:525)
at
org.apache.spark.util.collection.TimSort$SortState.mergeCollapse(TimSort.java:453)
at
org.apache.spark.util.collection.TimSort$SortState.access$200(TimSort.java:325)
at org.apache.spark.util.collection.TimSort.sort(TimSort.java:153)
at org.apache.spark.util.collection.Sorter.sort(Sorter.scala:37)
at
org.apache.spark.util.collection.unsafe.sort.UnsafeInMemorySorter.getSortedIterator(UnsafeInMemorySorter.java:231)
at
org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter.getSortedIterator(UnsafeExternalSorter.java:404)
at
org.apache.spark.sql.execution.UnsafeKVExternalSorter.sortedIterator(UnsafeKVExternalSorter.java:159)
at
org.apache.spark.sql.execution.datasources.DynamicPartitionWriterContainer.writeRows(WriterContainer.scala:365)
... 8 more
{code}
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