cmccabe commented on code in PR #16346:
URL: https://github.com/apache/kafka/pull/16346#discussion_r1643559385


##########
core/src/main/scala/kafka/server/DynamicBrokerConfig.scala:
##########
@@ -640,8 +640,8 @@ class DynamicBrokerConfig(private val kafkaConfig: 
KafkaConfig) extends Logging
       reconfigurable.validateReconfiguration(newConfigs)
     } catch {
       case e: ConfigException => throw e
-      case _: Exception =>
-        throw new ConfigException(s"Validation of dynamic config update of 
$updatedConfigNames failed with class ${reconfigurable.getClass}")
+      case e: Exception =>
+        throw new ConfigException(s"Validation of dynamic config update of 
$updatedConfigNames failed with class ${reconfigurable.getClass} due to: $e")

Review Comment:
   Putting a password string into an exception is certainly a bug. If we're 
doing that, let's file a JIRA for it and fix ASAP.
   
   @rajinisivaram : Do you have an example of code doing this?
   
   There are a limited number of reconfigurables that deal with SASL / SSL so 
we should be able to look at them all and fix them if needed.



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