gengliangwang commented on a change in pull request #34111:
URL: https://github.com/apache/spark/pull/34111#discussion_r717234537
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File path: build/mvn
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@@ -21,7 +21,14 @@ SELF=$(cd $(dirname $0) && pwd)
. "$SELF/util.sh"
if [ -z "${JAVA_HOME}" -a "$(command -v javac)" ]; then
- export JAVA_HOME="$(dirname $(dirname $(realpath $(command -v javac))))"
+ if [ "$(uname -s)" = "Darwin" ]; then
+ # For some version of macOS, "/usr/bin/javac" is a real file instead of a
symbolic link,
+ # so the java home may be set to path "/usr" improperly.
+ # And following command is the appropriate way of getting java home on
macOS.
Review comment:
```suggestion
# The following command is an appropriate way of setting JAVA_HOME on
macOS.
```
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