Kafka error. Couldn't resolve server PLAINTEXT://kafka-pcr9a-cp-kafka-headless:9092 from bootstrap.servers

Rancher 2.x
1

Hi.
I`m intalled kafka from Catalog Apps.
But have some problem.

Pods of kafka on different nodes, but couldn’t resolve server PLAINTEXT://kafka-pcr9a-cp-kafka-headless:9092

Screenshot 2021-06-16 at 12-55-50 Rancher
Screenshot 2021-06-16 at 12-55-50 Rancher1291×462 62.4 KB 

[main] WARN org.apache.kafka.clients.ClientUtils - Couldn't resolve server PLAINTEXT://kafka-pcr9a-cp-kafka-headless:9092 from bootstrap.servers as DNS resolution failed for kafka-pcr9a-cp-kafka-headless

[main] ERROR io.confluent.admin.utils.cli.KafkaReadyCommand - Error while running kafka-ready.

org.apache.kafka.common.KafkaException: Failed to create new KafkaAdminClient

	at org.apache.kafka.clients.admin.KafkaAdminClient.createInternal(KafkaAdminClient.java:407)

	at org.apache.kafka.clients.admin.AdminClient.create(AdminClient.java:65)

	at io.confluent.admin.utils.ClusterStatus.isKafkaReady(ClusterStatus.java:138)

	at io.confluent.admin.utils.cli.KafkaReadyCommand.main(KafkaReadyCommand.java:150)

Caused by: org.apache.kafka.common.config.ConfigException: No resolvable bootstrap urls given in bootstrap.servers

	at org.apache.kafka.clients.ClientUtils.parseAndValidateAddresses(ClientUtils.java:88)

	at org.apache.kafka.clients.ClientUtils.parseAndValidateAddresses(ClientUtils.java:47)

	at org.apache.kafka.clients.admin.KafkaAdminClient.createInternal(KafkaAdminClient.java:367)

How to fix it?