Add an java docs.

Signed-off-by: chickenchickenlove <[email protected]>

Author: chickenchickenlove

spring-kafka/src/main/java/org/springframework/kafka/listener/ListenerUtils.java

@@ -152,6 +152,7 @@ public static void conditionalSleep(Supplier<Boolean> shouldSleepCondition, long
 
 	/**
 	 * Sleep for the desired timeout, as long as shouldSleepCondition supplies true.
+	 * This method requires that the consumer is paused; otherwise, ConsumerRecord may be lost.
 	 * @param shouldSleepCondition to.
 	 * @param interval the timeout.
 	 * @param consumer the kafka consumer to call poll().