Repository: spark Updated Branches: refs/heads/master 00c02728a -> f16bc68df
[SPARK-9824] [CORE] Fix the issue that InternalAccumulator leaks WeakReference `InternalAccumulator.create` doesn't call `registerAccumulatorForCleanup` to register itself with ContextCleaner, so `WeakReference`s for these accumulators in `Accumulators.originals` won't be removed. This PR added `registerAccumulatorForCleanup` for internal accumulators to avoid the memory leak. Author: zsxwing <zsxw...@gmail.com> Closes #8108 from zsxwing/internal-accumulators-leak. Project: http://git-wip-us.apache.org/repos/asf/spark/repo Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/f16bc68d Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/f16bc68d Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/f16bc68d Branch: refs/heads/master Commit: f16bc68dfb25c7b746ae031a57840ace9bafa87f Parents: 00c0272 Author: zsxwing <zsxw...@gmail.com> Authored: Tue Aug 11 14:06:23 2015 -0700 Committer: Reynold Xin <r...@databricks.com> Committed: Tue Aug 11 14:06:23 2015 -0700 ---------------------------------------------------------------------- .../scala/org/apache/spark/Accumulators.scala | 22 ++++++++++++-------- .../org/apache/spark/scheduler/Stage.scala | 2 +- .../org/apache/spark/AccumulatorSuite.scala | 3 ++- 3 files changed, 16 insertions(+), 11 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/spark/blob/f16bc68d/core/src/main/scala/org/apache/spark/Accumulators.scala ---------------------------------------------------------------------- diff --git a/core/src/main/scala/org/apache/spark/Accumulators.scala b/core/src/main/scala/org/apache/spark/Accumulators.scala index 064246d..c39c866 100644 --- a/core/src/main/scala/org/apache/spark/Accumulators.scala +++ b/core/src/main/scala/org/apache/spark/Accumulators.scala @@ -382,14 +382,18 @@ private[spark] object InternalAccumulator { * add to the same set of accumulators. We do this to report the distribution of accumulator * values across all tasks within each stage. */ - def create(): Seq[Accumulator[Long]] = { - Seq( - // Execution memory refers to the memory used by internal data structures created - // during shuffles, aggregations and joins. The value of this accumulator should be - // approximately the sum of the peak sizes across all such data structures created - // in this task. For SQL jobs, this only tracks all unsafe operators and ExternalSort. - new Accumulator( - 0L, AccumulatorParam.LongAccumulatorParam, Some(PEAK_EXECUTION_MEMORY), internal = true) - ) ++ maybeTestAccumulator.toSeq + def create(sc: SparkContext): Seq[Accumulator[Long]] = { + val internalAccumulators = Seq( + // Execution memory refers to the memory used by internal data structures created + // during shuffles, aggregations and joins. The value of this accumulator should be + // approximately the sum of the peak sizes across all such data structures created + // in this task. For SQL jobs, this only tracks all unsafe operators and ExternalSort. + new Accumulator( + 0L, AccumulatorParam.LongAccumulatorParam, Some(PEAK_EXECUTION_MEMORY), internal = true) + ) ++ maybeTestAccumulator.toSeq + internalAccumulators.foreach { accumulator => + sc.cleaner.foreach(_.registerAccumulatorForCleanup(accumulator)) + } + internalAccumulators } } http://git-wip-us.apache.org/repos/asf/spark/blob/f16bc68d/core/src/main/scala/org/apache/spark/scheduler/Stage.scala ---------------------------------------------------------------------- diff --git a/core/src/main/scala/org/apache/spark/scheduler/Stage.scala b/core/src/main/scala/org/apache/spark/scheduler/Stage.scala index de05ee2..1cf0685 100644 --- a/core/src/main/scala/org/apache/spark/scheduler/Stage.scala +++ b/core/src/main/scala/org/apache/spark/scheduler/Stage.scala @@ -81,7 +81,7 @@ private[spark] abstract class Stage( * accumulators here again will override partial values from the finished tasks. */ def resetInternalAccumulators(): Unit = { - _internalAccumulators = InternalAccumulator.create() + _internalAccumulators = InternalAccumulator.create(rdd.sparkContext) } /** http://git-wip-us.apache.org/repos/asf/spark/blob/f16bc68d/core/src/test/scala/org/apache/spark/AccumulatorSuite.scala ---------------------------------------------------------------------- diff --git a/core/src/test/scala/org/apache/spark/AccumulatorSuite.scala b/core/src/test/scala/org/apache/spark/AccumulatorSuite.scala index 48f5495..0eb2293 100644 --- a/core/src/test/scala/org/apache/spark/AccumulatorSuite.scala +++ b/core/src/test/scala/org/apache/spark/AccumulatorSuite.scala @@ -160,7 +160,8 @@ class AccumulatorSuite extends SparkFunSuite with Matchers with LocalSparkContex } test("internal accumulators in TaskContext") { - val accums = InternalAccumulator.create() + sc = new SparkContext("local", "test") + val accums = InternalAccumulator.create(sc) val taskContext = new TaskContextImpl(0, 0, 0, 0, null, null, accums) val internalMetricsToAccums = taskContext.internalMetricsToAccumulators val collectedInternalAccums = taskContext.collectInternalAccumulators() --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@spark.apache.org For additional commands, e-mail: commits-h...@spark.apache.org
