I have lots of WARN in log every day.like these,what does means?[2019-05-24 11:05:06,784] WARN Attempting to send response via channel for which there is no open connection, connection id 2 (kafka.network.Processor) [2019-05-24 11:05:10,884] WARN Attempting to send response via channel for which there is no open connection, connection id 3 (kafka.network.Processor) [2019-05-24 11:10:13,635] WARN Attempting to send response via channel for which there is no open connection, connection id 2 (kafka.network.Processor) [2019-05-24 11:10:28,156] WARN Attempting to send response via channel for which there is no open connection, connection id 6 (kafka.network.Processor) kafka_2.11-0.10.2.1 zookeeper-3.4.10
igyu
