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https://issues.apache.org/jira/browse/SPARK-25081?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-25081:
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Assignee: Shixiong Zhu (was: Apache Spark)
> Nested spill in ShuffleExternalSorter may access a released memory page
> ------------------------------------------------------------------------
>
> Key: SPARK-25081
> URL: https://issues.apache.org/jira/browse/SPARK-25081
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.3.1
> Reporter: Shixiong Zhu
> Assignee: Shixiong Zhu
> Priority: Major
>
> This issue is pretty similar to SPARK-21907.
> "allocateArray" in
> [ShuffleInMemorySorter.reset|https://github.com/apache/spark/blob/9b8521e53e56a53b44c02366a99f8a8ee1307bbf/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java#L99]
> may trigger a spill and cause ShuffleInMemorySorter access the released
> `array`. Another task may get the same memory page from the pool. This will
> cause two tasks access the same memory page. When a task reads memory written
> by another task, many types of failures may happen. Here are some examples I
> have seen:
> - JVM crash. (This is easy to reproduce in a unit test as we fill newly
> allocated and deallocated memory with 0xa5 and 0x5a bytes which usually
> points to an invalid memory address)
> - java.lang.IllegalArgumentException: Comparison method violates its general
> contract!
> - java.lang.NullPointerException at
> org.apache.spark.memory.TaskMemoryManager.getPage(TaskMemoryManager.java:384)
> - java.lang.UnsupportedOperationException: Cannot grow BufferHolder by size
> -536870912 because the size after growing exceeds size limitation 2147483632
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