uros-b commented on code in PR #17331:
URL: https://github.com/apache/iceberg/pull/17331#discussion_r3657093991


##########
jmh.gradle:
##########
@@ -62,11 +62,33 @@ configure(jmhProjects) {
 
   jmh {
     jmhVersion = '1.37'
-    failOnError = true
+    // Was hard-coded true; one failing param combination aborted the whole 
suite and discarded
+    // already-completed results. Make it configurable, default preserved.
+    failOnError = project.hasProperty('jmhFailOnError') ? 
project.property('jmhFailOnError').toBoolean() : true
     forceGC = true
     includeTests = true
     humanOutputFile = file(jmhOutputPath)
-    jvmArgs = ['-Xmx32g']
+    // Configurable heap (default preserved at 32g); full-scale 
PlanningBenchmark ...WithStats OOMs at 32g.
+    // Plus the JDK 17 module opens Spark 4.x needs (sun.util.calendar for 
date conversion, etc.).
+    jvmArgs = [
+      '-Xmx' + (project.findProperty('jmhHeap') ?: '32g'),
+      '-XX:+IgnoreUnrecognizedVMOptions',
+      '--add-opens=java.base/java.lang=ALL-UNNAMED',
+      '--add-opens=java.base/java.lang.invoke=ALL-UNNAMED',
+      '--add-opens=java.base/java.lang.reflect=ALL-UNNAMED',
+      '--add-opens=java.base/java.io=ALL-UNNAMED',
+      '--add-opens=java.base/java.net=ALL-UNNAMED',
+      '--add-opens=java.base/java.nio=ALL-UNNAMED',
+      '--add-opens=java.base/java.util=ALL-UNNAMED',
+      '--add-opens=java.base/java.util.concurrent=ALL-UNNAMED',
+      '--add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED',
+      '--add-opens=java.base/jdk.internal.ref=ALL-UNNAMED',
+      '--add-opens=java.base/sun.nio.ch=ALL-UNNAMED',
+      '--add-opens=java.base/sun.nio.cs=ALL-UNNAMED',
+      '--add-opens=java.base/sun.security.action=ALL-UNNAMED',
+      '--add-opens=java.base/sun.util.calendar=ALL-UNNAMED',
+      '--add-opens=java.security.jgss/sun.security.krb5=ALL-UNNAMED'
+    ]

Review Comment:
   This looks like another hand-maintained copy (very similar to 
project.ext.extraJvmArgs) with possible maintenance drift issues in the future. 
Can we consolidate more robustly, to avoid falling out of sync?



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