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[GitHub] [spark] ulysses-you opened a new pull request, #37358: [SPARK-39932][SQL] WindowExec should clear the final partition buffer
ulysses-you opened a new pull request, #37358:
URL: https://github.com/apache/spark/pull/37358
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### What changes were proposed in this pull request?
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Explicitly clear final partition buffer if can not find next in `WindowExec`. The same fix in `WindowInPandasExec`
### Why are the changes needed?
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We do a repartition below a window, then we need do a local sort after window due to RoundRobinPartitioning shuffle.
The error stack:
```java
ExternalAppendOnlyUnsafeRowArray INFO - Reached spill threshold of 4096 rows, switching to org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter
org.apache.spark.memory.SparkOutOfMemoryError: Unable to acquire 65536 bytes of memory, got 0
at org.apache.spark.memory.MemoryConsumer.throwOom(MemoryConsumer.java:157)
at org.apache.spark.memory.MemoryConsumer.allocateArray(MemoryConsumer.java:97)
at org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter.growPointerArrayIfNecessary(UnsafeExternalSorter.java:352)
at org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter.allocateMemoryForRecordIfNecessary(UnsafeExternalSorter.java:435)
at org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter.insertRecord(UnsafeExternalSorter.java:455)
at org.apache.spark.sql.execution.UnsafeExternalRowSorter.insertRow(UnsafeExternalRowSorter.java:138)
at org.apache.spark.sql.execution.UnsafeExternalRowSorter.sort(UnsafeExternalRowSorter.java:226)
at org.apache.spark.sql.execution.exchange.ShuffleExchangeExec$.$anonfun$prepareShuffleDependency$10(ShuffleExchangeExec.scala:355)
```
`WindowExec` only clear buffer in `fetchNextPartition` so the final partition buffer miss to clear.
It is not a big problem since we have task completion listener.
```scala
taskContext.addTaskCompletionListener(context -> {
cleanupResources();
});
```
This bug only affects if the window is not the last operator for this task and the follow operator like sort.
### Does this PR introduce _any_ user-facing change?
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yes, bug fix
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N/A
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[GitHub] [spark] HyukjinKwon closed pull request #37358: [SPARK-39932][SQL] WindowExec should clear the final partition buffer
Posted by GitBox <gi...@apache.org>.
HyukjinKwon closed pull request #37358: [SPARK-39932][SQL] WindowExec should clear the final partition buffer
URL: https://github.com/apache/spark/pull/37358
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[GitHub] [spark] HyukjinKwon commented on pull request #37358: [SPARK-39932][SQL] WindowExec should clear the final partition buffer
Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on PR #37358:
URL: https://github.com/apache/spark/pull/37358#issuecomment-1202220591
Merged to master, branch-3.3, branch-3.2, branch-3.1 and branch-3.0.
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[GitHub] [spark] cloud-fan commented on pull request #37358: [SPARK-39932][SQL] WindowExec should clear the final partition buffer
Posted by GitBox <gi...@apache.org>.
cloud-fan commented on PR #37358:
URL: https://github.com/apache/spark/pull/37358#issuecomment-1201978144
also cc @maryannxue @hvanhovell
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[GitHub] [spark] ulysses-you commented on pull request #37358: [SPARK-39932][SQL] WindowExec should clear the final partition buffer
Posted by GitBox <gi...@apache.org>.
ulysses-you commented on PR #37358:
URL: https://github.com/apache/spark/pull/37358#issuecomment-1201038248
@HyukjinKwon @cloud-fan @c21
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[GitHub] [spark] ulysses-you commented on pull request #37358: [SPARK-39932][SQL] WindowExec should clear the final partition buffer
Posted by GitBox <gi...@apache.org>.
ulysses-you commented on PR #37358:
URL: https://github.com/apache/spark/pull/37358#issuecomment-1203383273
thank you all !
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