rajinisivaram commented on code in PR #16346:
URL: https://github.com/apache/kafka/pull/16346#discussion_r1642352229


##########
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:
   Some config exceptions may contain sensitive data like SASL passwords or SSL 
info. We need to make sure the exception string doesn't include any sensitive 
information, especially if it could be sent to clients.



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