HeartSaVioR commented on a change in pull request #27191: [SPARK-30495][SS] 
Consider spark.security.credentials.kafka.enabled and cluster configuration 
when checking latest delegation token
URL: https://github.com/apache/spark/pull/27191#discussion_r366310601
 
 

 ##########
 File path: 
external/kafka-0-10-token-provider/src/main/scala/org/apache/spark/kafka010/KafkaTokenUtil.scala
 ##########
 @@ -293,11 +293,11 @@ private[spark] object KafkaTokenUtil extends Logging {
   def isConnectorUsingCurrentToken(
       params: ju.Map[String, Object],
       clusterConfig: Option[KafkaTokenClusterConf]): Boolean = {
-    if (params.containsKey(SaslConfigs.SASL_JAAS_CONFIG)) {
+    if 
(SparkEnv.get.conf.getBoolean("spark.security.credentials.kafka.enabled", true) 
&&
 
 Review comment:
   OK got it. It would be better if we have sparkConf as a parameter, like 
other methods in this class. It will help to avoid bothering with NPE issue due 
to SparkEnv.get being null in test suite, as well as easier to inject Spark 
configuration during tests.

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