[GitHub] [spark] dongjoon-hyun commented on a diff in pull request #37002: [SPARK-39616][BUILD][ML] Upgrade Breeze to 2.0

[GitBox <gi...@apache.org>]

dongjoon-hyun commented on code in PR #37002:
URL: https://github.com/apache/spark/pull/37002#discussion_r913313711


##########
python/run-tests.py:
##########
@@ -96,7 +96,8 @@ def run_individual_python_test(target_dir, test_name, pyspark_python):
     os.mkdir(metastore_dir)
 
     # Also override the JVM's temp directory by setting driver and executor options.
-    java_options = "-Djava.io.tmpdir={0} -Dio.netty.tryReflectionSetAccessible=true".format(tmp_dir)
+    java_options = "-Djava.io.tmpdir={0}".format(tmp_dir)
+    java_options = java_options + " -Dio.netty.tryReflectionSetAccessible=true -Xss16M"

Review Comment:
   Are we using smaller memory in `PySpark` and `SparkR`?
   
   Scala UT seems to use small stack size, `4m`, at large memory like `mx4g`.
   ```
   -Xmx4g -Xss4m -XX:MaxMetaspaceSize=2g
   ```
   
   Although this is already passed, do you think we can use more consistent settings across Scala/Python/R?



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