Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20424#discussion_r165261830
--- Diff:
core/src/main/scala/org/apache/spark/api/python/PythonWorkerFactory.scala ---
@@ -191,7 +191,20 @@ private[spark] class PythonWorkerFactory(pythonExec:
String, envVars: Map[String
daemon = pb.start()
val in = new DataInputStream(daemon.getInputStream)
- daemonPort = in.readInt()
+ try {
+ daemonPort = in.readInt()
+ } catch {
+ case exc: EOFException =>
+ throw new IOException(s"No port number in $daemonModule's
stdout")
+ }
+
+ // test that the returned port number is within a valid range.
+ // note: this does not cover the case where the port number
+ // is arbitrary data but is also coincidentally within range
+ if (daemonPort < 1 || daemonPort > 0xffff) {
--- End diff --
Ah, OK. Thanks for clarification. Maybe, I was caring too much about it.
Thanks all for bearing with me. I am fine as is.
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