我开发了一个基于spark的应用程序，它使用intellij从kafka获取数据并将其保存在cassandra数据库中。
scala中的连接代码：
val cluster = Cluster.builder().addContactPoint("192.168.0.253").withPort(9042).build();
val session = cluster.connect()
当我从intellij运行代码时，代码工作正常，但是当我尝试使用命令行从jar运行它时出现此错误：
Exception in thread "main" java.io.IOException:
Failed to open native connection to Cassandra at {192.168.0.253}:9042 at .... ....
Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException:
All host(s) tried for query failed
(tried: /192.168.0.253:9042 (com.datastax.driver.core.exceptions.TransportException:
[/192.168.0.253] Error writing)) at
com.datastax.driver.core.ControlConnection.reconnectInternal(
ControlConnection.java:233) at
com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:79)
at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1424)
at com.datastax.driver.core.Cluster.getMetadata(Cluster.java:403)
at com.datastax.spark.connector.cql.CassandraConnector$.
com$datastax$spark$connector$cql$CassandraConnector$$createSession(
CassandraConnector.scala:155) ... 13 more
我已经从intellij生成了一个jar文件，我使用[copy to the output directory and link via showsist]选项构建了带依赖关系的jar。
cassandra.yaml文件：
#Whether to start the native transport server.
start_native_transport: true
#port for the CQL native transport to listen for clients on
native_transport_port: 9042
为什么会出现此错误＆amp;我该如何解决？
提前致谢