Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/2623#discussion_r18332145
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -1437,7 +1437,13 @@ private[spark] object Utils extends Logging {
val serviceString = if (serviceName.isEmpty) "" else s" '$serviceName'"
for (offset <- 0 to maxRetries) {
// Do not increment port if startPort is 0, which is treated as a
special port
- val tryPort = if (startPort == 0) startPort else (startPort +
offset) % 65536
+ val _tryPort = if (startPort == 0) startPort else (startPort +
offset) % 65536
--- End diff --
No, this formula would return 4040 -- note the `- 1024`. Is it true that
privileged ports should be prohibited? It doesn't seem crazy to want to run a
web UI on port 80. If prohibited, I think it should generate an error message.
Here it simply uses an entirely different port, which seems odd. But I don't
think the point of this PR should be to make ports under 1024 unusable.
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