srowen commented on a change in pull request #21663:
[SPARK-24680][Deploy]Support spark.executorEnv.JAVA_HOME in Standalone mode
URL: https://github.com/apache/spark/pull/21663#discussion_r242002366
##########
File path:
launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
##########
@@ -95,10 +95,12 @@
if (javaHome != null) {
cmd.add(join(File.separator, javaHome, "bin", "java"));
+ } else if (childEnv.containsKey("JAVA_HOME")) {
Review comment:
I think this change could be fine, but I wonder if we can rewrite the logic
so that these cases update a variable tracking what the Java home is, and add
the command once at the end. The logic is duplicated four times here.
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