Document Mesos SSL config

./spark-submit  --class org.apache.spark.examples.SparkPi --master mesos://<mesos_master_with_https>:5050 --conf spark.master.rest.enabled=true --deploy-mode cluster --supervise --executor-memory 10G --total-executor-cores 100 ../examples/jars/spark-examples_2.11-2.4.0.jar 1000

2018-12-10 15:08:39 WARN NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
2018-12-10 15:08:39 INFO RestSubmissionClient:54 - Submitting a request to launch an application in mesos://<mesos_master_with_https>:5050.
2018-12-10 15:08:39 WARN RestSubmissionClient:66 - Unable to connect to server mesos://<mesos_master_with_https>:5050.
Exception in thread "main" org.apache.spark.deploy.rest.SubmitRestConnectionException: Unable to connect to server
at org.apache.spark.deploy.rest.RestSubmissionClient$$anonfun$createSubmission$3.apply(RestSubmissionClient.scala:104)
at org.apache.spark.deploy.rest.RestSubmissionClient$$anonfun$createSubmission$3.apply(RestSubmissionClient.scala:86)
at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:733)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:732)
at org.apache.spark.deploy.rest.RestSubmissionClient.createSubmission(RestSubmissionClient.scala:86)
at org.apache.spark.deploy.rest.RestSubmissionClientApp.run(RestSubmissionClient.scala:443)
at org.apache.spark.deploy.rest.RestSubmissionClientApp.start(RestSubmissionClient.scala:455)
at org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:849)
at org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:167)
at org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:195)
at org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:86)
at org.apache.spark.deploy.SparkSubmit$$anon$2.doSubmit(SparkSubmit.scala:924)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:933)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: org.apache.spark.deploy.rest.SubmitRestConnectionException: Unable to connect to server
at org.apache.spark.deploy.rest.RestSubmissionClient.readResponse(RestSubmissionClient.scala:281)
at org.apache.spark.deploy.rest.RestSubmissionClient.org$apache$spark$deploy$rest$RestSubmissionClient$$postJson(RestSubmissionClient.scala:225)
at org.apache.spark.deploy.rest.RestSubmissionClient$$anonfun$createSubmission$3.apply(RestSubmissionClient.scala:90)
... 15 more
Caused by: java.net.SocketException: Connection reset

RestSubmissionClient.scala
/** Return the base URL for communicating with the server, including the protocol version. */
private def getBaseUrl(master: String): String = {
  var masterUrl = master
  supportedMasterPrefixes.foreach { prefix =>
    if (master.startsWith(prefix)) {
      masterUrl = master.stripPrefix(prefix)
    }
  }
  masterUrl = masterUrl.stripSuffix("/")
  s"http://$masterUrl/$PROTOCOL_VERSION/submissions" <--- hardcoded http
}

./spark-submit  --class org.apache.spark.examples.SparkPi --master mesos://<server_using_https>:5050  --supervise --executor-memory 10G --total-executor-cores 100 ../examples/jars/spark-examples_2.11-2.4.0.jar 1000
 

2018-12-10 15:01:05 INFO SparkUI:54 - Bound SparkUI to 0.0.0.0, and started at http://_host:4040
2018-12-10 15:01:05 INFO SparkContext:54 - Added JAR file:/home/<user>/spark-2.4.0-bin-hadoop2.7/bin/../examples/jars/spark-examples_2.11-2.4.0.jar at spark://_host:35719/jars/spark-examples_2.11-2.4.0.jar with timestamp 1544450465799
I1210 15:01:05.963078 37943 sched.cpp:232] Version: 1.3.2
I1210 15:01:05.966814 37911 sched.cpp:336] New master detected at master@53.54.195.251:5050
I1210 15:01:05.967010 37911 sched.cpp:352] No credentials provided. Attempting to register without authentication
E1210 15:01:05.967347 37942 process.cpp:2455] Failed to shutdown socket with fd 307, address 53.54.195.251:45206: Transport endpoint is not connected
E1210 15:01:05.968212 37942 process.cpp:2369] Failed to shutdown socket with fd 307, address 53.54.195.251:45212: Transport endpoint is not connected
E1210 15:01:05.969405 37942 process.cpp:2455] Failed to shutdown socket with fd 307, address 53.54.195.251:45222: Transport endpoint is not connected

E1210 15:01:06.665076  2633 process.cpp:956] Failed to accept socket: Failed accept: connection error: error:1407609C:SSL routines:SSL23_GET_CLIENT_HELLO:http request

LIBPROCESS_SSL_VERIFY_CERT=false
LIBPROCESS_SSL_KEY_FILE=/home/machjor/server_2048.key
LIBPROCESS_SSL_ENABLED=true
LIBPROCESS_SSL_CERT_FILE=/home/machjor/server.crt