mridulm commented on PR #52665:
URL: https://github.com/apache/spark/pull/52665#issuecomment-3619764499
hmm, JAVA_HOME can point to arbitrary path and need not be valid - right ?
Given that, we should check for validity of path (more precisely if jmap is
actually present at `$JAVA_HOME/bin/jmap` ?
Example:
```
$ export JAVA_HOME=/dev/null
$ scala
Welcome to Scala 2.13.16 (OpenJDK 64-Bit Server VM, Java 17.0.17).
Type in expressions for evaluation. Or try :help.
scala> System.getenv("JAVA_HOME")
val res1: String = /dev/null
scala> System.getProperty("java.home")
val res2: String = /usr/lib/jvm/java-17-openjdk-amd64
scala>
```
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