brumi1024 commented on code in PR #5935:
URL: https://github.com/apache/hadoop/pull/5935#discussion_r1289730079
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/launcher/ContainerLaunch.java:
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@@ -170,6 +170,13 @@ public static String expandEnvironment(String var,
var = var.replace(ApplicationConstants.CLASS_PATH_SEPARATOR,
File.pathSeparator);
+ if (Shell.isJavaVersionAtLeast(17)) {
Review Comment:
Had an offline discussion with @tomicooler, the issue with not using a
placeholder is the way commands is contructed: in contrast to it's name and
type it's a String list containing one element only, the command that is to be
executed. In case of Java apps we must add this parameter before the main
class, hence I see two options here: add the placeholder right after -Xmx (so
that we know it'll be in the correct place) or I can deconstruct the first
element of the commands array and add the add-opens flag to the correct place.
I think the former is a cleaner, less error-prone solution.
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