tgravescs commented on a change in pull request #28880:
URL: https://github.com/apache/spark/pull/28880#discussion_r444234809
##########
File path:
resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
##########
@@ -211,9 +211,11 @@ private[spark] class ApplicationMaster(
final def run(): Int = {
try {
val attemptID = if (isClusterMode) {
- // Set the web ui port to be ephemeral for yarn so we don't conflict
with
- // other spark processes running on the same box
- System.setProperty(UI_PORT.key, "0")
+ // Set the web ui port to be ephemeral for yarn if not set explicitly
+ // so we don't conflict with other spark processes running on the same
box
Review comment:
lets update the comment to say if explicitly set, it acts as a port
range based on spark.port.maxRetries so make sure that is sufficiently large
for your setup to avoid port conflicts.
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