Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/9257#discussion_r42999614
--- Diff: core/src/main/scala/org/apache/spark/SecurityManager.scala ---
@@ -365,33 +366,37 @@ private[spark] class SecurityManager(sparkConf:
SparkConf)
* we throw an exception.
*/
private def generateSecretKey(): String = {
- if (!isAuthenticationEnabled) return null
- // first check to see if the secret is already set, else generate a
new one if on yarn
- val sCookie = if (SparkHadoopUtil.get.isYarnMode) {
- val secretKey =
SparkHadoopUtil.get.getSecretKeyFromUserCredentials(sparkSecretLookupKey)
- if (secretKey != null) {
- logDebug("in yarn mode, getting secret from credentials")
- return new Text(secretKey).toString
+ if (!isAuthenticationEnabled) {
+ null
+ } else if (SparkHadoopUtil.get.isYarnMode) {
+ // In YARN mode, the secure cookie will be created by the driver and
stashed in the
+ // user's credentials, where executors can get it. The check for an
array of size 0
+ // is because of the test code in YarnSparkHadoopUtilSuite.
+ val secretKey =
SparkHadoopUtil.get.getSecretKeyFromUserCredentials(SECRET_LOOKUP_KEY)
+ if (secretKey == null || secretKey.length == 0) {
+ val rnd = new SecureRandom()
+ val length =
sparkConf.getInt("spark.authenticate.secretBitLength", 256) / 8
--- End diff --
does akka have a limit on the size of this? I remember the documentation
being very sparse on the details.
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