我正在尝试用自我管理的kafka集群（在ec2示例上）实现glue etl作业。正如我在本地机器上用简单的poducer和consumer脚本检查的那样，集群正在工作。问题是，在glue job中，我在日志中收到以下警告：

Feb 11, 2021, 5:31:06 PM 21/02/11 11:31:06 WARN NetworkClient: [Consumer clientId=consumer-1, groupId=spark-kafka-source-3e37027f-1b50-4aac-bbbf-68c11f4db9bd-1062155183-driver-0] Connection to node -1 could not be established. Broker may not be available.
Feb 11, 2021, 5:33:17 PM 21/02/11 11:33:17 WARN NetworkClient: [Consumer clientId=consumer-1, groupId=spark-kafka-source-3e37027f-1b50-4aac-bbbf-68c11f4db9bd-1062155183-driver-0] Connection to node -3 could not be established. Broker may not be available.
Feb 11, 2021, 5:35:28 PM 21/02/11 11:35:28 WARN NetworkClient: [Consumer clientId=consumer-1, groupId=spark-kafka-source-3e37027f-1b50-4aac-bbbf-68c11f4db9bd-1062155183-driver-0] Connection to node -2 could not be established. Broker may not be available.
Feb 11, 2021, 5:37:39 PM 21/02/11 11:37:39 WARN NetworkClient: [Consumer clientId=consumer-1, groupId=spark-kafka-source-3e37027f-1b50-4aac-bbbf-68c11f4db9bd-1062155183-driver-0] Connection to node -1 could not be established. Broker may not be available.
Feb 11, 2021, 5:39:50 PM 21/02/11 11:39:50 WARN NetworkClient: [Consumer clientId=consumer-1, groupId=spark-kafka-source-3e37027f-1b50-4aac-bbbf-68c11f4db9bd-1062155183-driver-0] Connection to node -3 could not be established. Broker may not be available.

我检查了sgs的ec2示例，胶水连接的设置，但它仍然不工作