执行指令 bin/kafka-consumer-groups.sh --group 'logstash' --describe --zookeeper 127.0.0.1:2181 报错 Error while executing consumer group command null

我想看下消费组的情况，发生错误。 求大神帮忙看下，这是由什么原因导致的。 之前执行都没报错。

[root@iZ236mkotzjZ kafka_2.11-0.10.0.1]# bin/kafka-consumer-groups.sh --group 'logstash' --describe --zookeeper 127.0.0.1:2181
GROUP                          TOPIC                          PARTITION  CURRENT-OFFSET  LOG-END-OFFSET  LAG             OWNER
logstash                       test2                          0          10910           49999           39089           none
Error while executing consumer group command null
java.nio.channels.ClosedChannelException
    at kafka.network.BlockingChannel.send(BlockingChannel.scala:110)
    at kafka.consumer.SimpleConsumer.liftedTree1$1(SimpleConsumer.scala:98)
    at kafka.consumer.SimpleConsumer.kafka$consumer$SimpleConsumer$$sendRequest(SimpleConsumer.scala:83)
    at kafka.consumer.SimpleConsumer.getOffsetsBefore(SimpleConsumer.scala:149)
    at kafka.admin.ConsumerGroupCommand$ZkConsumerGroupService$$anonfun$getLogEndOffset$1.apply(ConsumerGroupCommand.scala:194)
    at kafka.admin.ConsumerGroupCommand$ZkConsumerGroupService$$anonfun$getLogEndOffset$1.apply(ConsumerGroupCommand.scala:191)
    at scala.Option.map(Option.scala:146)
    at kafka.admin.ConsumerGroupCommand$ZkConsumerGroupService.getLogEndOffset(ConsumerGroupCommand.scala:191)
    at kafka.admin.ConsumerGroupCommand$ConsumerGroupService$class.kafka$admin$ConsumerGroupCommand$ConsumerGroupService$$describePartition(ConsumerGroupCommand.scala:122)
    at kafka.admin.ConsumerGroupCommand$ConsumerGroupService$$anonfun$describeTopicPartition$2.apply(ConsumerGroupCommand.scala:104)
    at kafka.admin.ConsumerGroupCommand$ConsumerGroupService$$anonfun$describeTopicPartition$2.apply(ConsumerGroupCommand.scala:103)
    at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
    at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
    at kafka.admin.ConsumerGroupCommand$ConsumerGroupService$class.describeTopicPartition(ConsumerGroupCommand.scala:103)
    at kafka.admin.ConsumerGroupCommand$ZkConsumerGroupService.describeTopicPartition(ConsumerGroupCommand.scala:131)
    at kafka.admin.ConsumerGroupCommand$ZkConsumerGroupService.kafka$admin$ConsumerGroupCommand$ZkConsumerGroupService$$describeTopic(ConsumerGroupCommand.scala:178)
    at kafka.admin.ConsumerGroupCommand$ZkConsumerGroupService$$anonfun$describeGroup$1.apply(ConsumerGroupCommand.scala:163)
    at kafka.admin.ConsumerGroupCommand$ZkConsumerGroupService$$anonfun$describeGroup$1.apply(ConsumerGroupCommand.scala:163)
    at scala.collection.Iterator$class.foreach(Iterator.scala:893)
    at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
    at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
    at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
    at kafka.admin.ConsumerGroupCommand$ZkConsumerGroupService.describeGroup(ConsumerGroupCommand.scala:163)
    at kafka.admin.ConsumerGroupCommand$ConsumerGroupService$class.describe(ConsumerGroupCommand.scala:86)
    at kafka.admin.ConsumerGroupCommand$ZkConsumerGroupService.describe(ConsumerGroupCommand.scala:131)
    at kafka.admin.ConsumerGroupCommand$.main(ConsumerGroupCommand.scala:65)
    at kafka.admin.ConsumerGroupCommand.main(ConsumerGroupCommand.scala)