我在从Kubernetes pod访问Kafka服务时遇到间歇性问题。

org.apache.kafka.common.KafkaException: Failed to construct kafka producer
    at org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:432)
    at org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:298)
    at oracle.fs.framework.core.transports.event.kafka.KafkaFactory.createProducer(KafkaFactory.java:29)
    at oracle.fs.framework.core.transports.event.kafka.stream.KafkaStreamEventTransport.start(KafkaStreamEventTransport.java:165)
    at oracle.fs.framework.core.service.TransportLifecycleHandler.start(TransportLifecycleHandler.java:57)
    at oracle.fs.framework.core.service.AbstractService.start(AbstractService.java:400)
    at oracle.fs.foundation.bootstrap.Bootstrap.startDomain(Bootstrap.java:555)
    at oracle.fs.foundation.bootstrap.Bootstrap.startDomain(Bootstrap.java:188)
    at oracle.fs.foundation.bootstrap.Bootstrap.startDomain(Bootstrap.java:147)
    at oracle.fs.foundation.bootstrap.Bootstrap.startDomain(Bootstrap.java:102)
    at oracle.fs.service.driver.DomainServiceDriver.startService(DomainServiceDriver.java:24)
    at oracle.fs.service.driver.DomainServiceDriver.main(DomainServiceDriver.java:19)
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.producer.KafkaProducer.<init>(KafkaProducer.java:407)

我不知道是什么原因间歇性地导致这个问题，因为我发现引导URL是正确的。