Github user SparkQA commented on the pull request: https://github.com/apache/spark/pull/9344#issuecomment-152346289 **[Test build #44633 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/44633/consoleFull)** for PR 9344 at commit [`82fffab`](https://github.com/apache/spark/commit/82fffabad5a85a7bffee8bce953a16f82a53484c). * This patch **fails Spark unit tests**. * This patch merges cleanly. * This patch adds the following public classes _(experimental)_:\n * `class ExecutionMemoryPool(memoryManager: Object, poolName: String) extends MemoryPool with Logging `\n * `abstract class MemoryPool `\n * `class StorageMemoryPool extends MemoryPool with Logging `\n * `abstract class CentralMomentAgg(child: Expression) extends ImperativeAggregate with Serializable `\n * `case class Variance(child: Expression,`\n * `case class VarianceSamp(child: Expression,`\n * `case class VariancePop(child: Expression,`\n * `case class Skewness(child: Expression,`\n * `case class Kurtosis(child: Expression,`\n * `case class Kurtosis(child: Expression) extends UnaryExpression with AggregateExpression1 `\n * `case class Skewness(child: Expression) extends UnaryExpression with AggregateExpression1 `\n * `case class Variance(child: Expression) extends UnaryExpression with AggregateExpression1 `\n * `case class VariancePop(child: Expression) extends UnaryExpression with AggregateExpr ession1 `\n * `case class VarianceSamp(child: Expression) extends UnaryExpression with AggregateExpression1 `\n
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