(spark) branch master updated: [MINOR][CORE][TESTS] Call System.gc() before running test java.lang.ArrayIndexOutOfBoundsException in TimSort

[gu...@apache.org]

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gurwls223 pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/spark.git


The following commit(s) were added to refs/heads/master by this push:
     new 0390e4b44aa6 [MINOR][CORE][TESTS] Call System.gc() before running test java.lang.ArrayIndexOutOfBoundsException in TimSort
0390e4b44aa6 is described below

commit 0390e4b44aa6e8d575b7fa840281d5babfbaa484
Author: Cheng Pan <ch...@apache.org>
AuthorDate: Wed Mar 18 07:15:21 2026 +0900

    [MINOR][CORE][TESTS] Call System.gc() before running test java.lang.ArrayIndexOutOfBoundsException in TimSort
    
    ### What changes were proposed in this pull request?
    
    As title.
    
    ### Why are the changes needed?
    
    I see many times that the CI fails with
    ```
    Uncaught exception when running org.apache.spark.util.collection.SorterSuite: java.lang.OutOfMemoryError: Java heap space
    ```
    
    for example, https://github.com/apache/spark/actions/runs/23195671190/job/67403496767
    
    the test case allocates a large array on the heap, so doing a GC ahead might help.
    
    ### Does this PR introduce _any_ user-facing change?
    
    No.
    
    ### How was this patch tested?
    
    Monitor CI stability.
    
    ### Was this patch authored or co-authored using generative AI tooling?
    
    No.
    
    Closes #54867 from pan3793/minor-gc.
    
    Authored-by: Cheng Pan <ch...@apache.org>
    Signed-off-by: Hyukjin Kwon <gu...@apache.org>
---
 core/src/test/scala/org/apache/spark/util/collection/SorterSuite.scala | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/src/test/scala/org/apache/spark/util/collection/SorterSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/SorterSuite.scala
index 4eb38e51071b..7551327d704b 100644
--- a/core/src/test/scala/org/apache/spark/util/collection/SorterSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/collection/SorterSuite.scala
@@ -71,6 +71,7 @@ class SorterSuite extends SparkFunSuite {
   }
 
   test("java.lang.ArrayIndexOutOfBoundsException in TimSort") {
+    System.gc()
     // scalastyle:off
     val runLengths = Array(76405736, 74830360, 1181532, 787688, 1575376, 2363064, 3938440, 6301504,
       1181532, 393844, 15753760, 1575376, 787688, 393844, 1969220, 3150752, 1181532,787688, 5513816, 3938440,


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