Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/22854#discussion_r228583684
--- Diff: build/mvn ---
@@ -163,8 +163,19 @@ export MAVEN_OPTS=${MAVEN_OPTS:-"$_COMPILE_JVM_OPTS"}
echo "Using \`mvn\` from path: $MVN_BIN" 1>&2
-# Last, call the `mvn` command as usual
+# call the `mvn` command as usual
"${MVN_BIN}" -DzincPort=${ZINC_PORT} "$@"
-# Try to shut down zinc explicitly
-"${ZINC_BIN}" -shutdown -port ${ZINC_PORT}
+# check to see if zinc server is still running post-build
+"${ZINC_BIN}" -status -port ${ZINC_PORT} &> /dev/null
+ZINC_STATUS=$?
+
+# Try to shut down zinc explicitly if the server is still running
+if [ $ZINC_STATUS -eq 0 ]; then
+ # zinc is still running!
+ "${ZINC_BIN}" -shutdown -port ${ZINC_PORT}
+ exit 0
--- End diff --
I suppose you just want to exit 0 outside the if-else, for clarity, but
whatever. This is all fine and can be back-ported back to 2.2
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