diff options
| -rw-r--r-- | core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala index 138c05dff1..31230d5978 100644 --- a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala +++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala @@ -297,6 +297,8 @@ private[spark] class ExternalSorter[K, V, C]( val it = collection.destructiveSortedWritablePartitionedIterator(comparator) while (it.hasNext) { val partitionId = it.nextPartition() + require(partitionId >= 0 && partitionId < numPartitions, + s"partition Id: ${partitionId} should be in the range [0, ${numPartitions})") it.writeNext(writer) elementsPerPartition(partitionId) += 1 objectsWritten += 1 |