[GitHub] [poi] manticore-projects commented on a change in pull request #275: Better parallel build performance

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

manticore-projects commented on a change in pull request #275:
URL: https://github.com/apache/poi/pull/275#discussion_r741655886



##########
File path: build.gradle
##########
@@ -271,8 +278,10 @@ subprojects {
             '-Djavax.xml.stream.XMLInputFactory=com.sun.xml.internal.stream.XMLInputFactoryImpl',
             "-Dversion.id=${project.version}",
             '-ea',
-            '-Djunit.jupiter.execution.parallel.config.strategy=fixed',
-            '-Djunit.jupiter.execution.parallel.config.fixed.parallelism=2'
+            '-Djunit.jupiter.execution.parallel.enabled=true',
+            '-Djunit.jupiter.execution.parallel..mode.default=concurrent'

Review comment:
       > So we should avoid running into the same problems again. Can we have at least a way to configure the run in CI to not run with full parallel build so we can keep CI stable without adding such hard to track-down breakages?
   
   Thank you for the feedback. It is definitely possible, although I have one major question: How to detect the "CI" and to know that we are building on the "CI"? 
   I have built everything just fine on a 2 Core 3GB machine, is the "CI" anyhow worse equipped? Does the "CI" have a certain distinct hostname or configuration we could use for identifying?




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