使用集群类型 HOST 时无法连接 Oracle 数据库

Question

我在连接oracle DB时遇到以下错误，我正在使用spring boot JDBC模板连接数据库。错误如下，

Exception in thread "main" java.lang.Exception: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
    at com.falabella.util.OracleDB.main(OracleDB.java:70)
Caused by: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
    at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:392)
Caused by: java.net.UnknownHostException: NODE-01: nodename nor servname provided, or not known

以下是我的发现，我的数据库服务器主机拥有集群并且它有两个节点，如下所示，

   Cluster (wood.clsuter.com)
     |  NODE01 (wood-01)
     |  NODE02 (wood-02)

我的连接字符串是这样的，jdbc:oracle:thin:@wood-clsuter.com:1531/service_name

当我在连接字符串中使用集群名称时，我遇到了以下错误

Caused by: java.net.UnknownHostException: wood-01: nodename nor servname provided, or not known

而如果我在连接字符串中使用任何节点名称，则能够毫无问题地连接数据库，工作连接字符串如下所示， jdbc:oracle:thin:@wood-01.com:1531/service_name 或 jdbc:oracle:thin:@wood-02.com:1531/service_name

由于我需要使用我的数据库请求作为负载平衡，我需要使用集群名称而不是从节点，

我想知道这个问题的根本原因，这种生产环境问题，

你能帮我解决这个问题吗？

Answer 1

您需要将连接字符串更改为：

"jdbc:oracle:thin:@(DESCRIPTION=(FAILOVER=ON)(LOAD_BALANCE=ON)(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=wood-01.com)(PORT = 1531))(ADDRESS = (PROTOCOL = TCP)(HOST = wood-02.com)(PORT = 1531)))(CONNECT_DATA=(SERVICE_NAME =service_name)(FAILOVER_MODE=(TYPE=select)(METHOD=basic))))"