...
keytool -import -v -trustcacerts -alias kafkaservice kafkaclient -file ../kafka_ssl_client/certfile.pem -keystore server.truststore.jks
...
...
keytool -import -v -trustcacerts -alias kafkaservice kafkaclient -file ../kafka_ssl_client/certfile.pem -keystore server.truststore.jks
...