有时会出现javax.servlet.ServletException: Io 异常: The Network Adapter could not establish the connection DriverManager.getConnection("jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=xxx.xxx.xxx.xx1)(PORT=1521))(ADDRESS=(PROTOCOL=TCP)(HOST=xxx.xxx.xxx.xx2)(PORT=1521))(LOAD_BALANCE=yes))(CONNECT_DATA=(SERVICE_NAME=xxx)))","xxx","xxx");请问,是什么问题?
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