ORA-0131:Insufficient privileges.
Note:Debugging requires the DEBUG CONNECT SESSION system privileges.
后经查找，是缺失 DEBUG CONNECT SESSION 系统权限所致。
解决办法：以SYS用户登录数据库，执行赋权操作：
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SQL> grant DEBUG CONNECT SESSION to user_name;
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附1：有网友指出还需赋予DEBUG ANY PROCEDURE的权限，经测试，该权限可不用赋予！
附2：可以从数据字典role_sys_privs表查看该权限相关信息：
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SQL> conn / as sysdba;
Connected.SQL> select * from role_sys_privs where privilege like \'DEBUG%\' order by 2;
ROLE PRIVILEGE ADM---------------- ------------------------ ---DBA DEBUG ANY PROCEDURE YES
JAVADEBUGPRIV DEBUG ANY PROCEDURE NO
DBA DEBUG CONNECT SESSION YES
JAVADEBUGPRIV DEBUG CONNECT SESSION NO
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简单记录，以作备忘！