ORACLE12.2中用户无法登陆报ORA-01017的解决办法
错误现象：
在ORACLE12.2中创建一个用户linfy后，登陆:SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 ORCLPDB READ WRITE NO
SQL> alter session set container=orclpdb;
Session altered.
SQL> conn linfy/linfy@orclpdb
ERROR:
ORA-01017: invalid username/password; logon denied
Warning: You are no longer connected to ORACLE.
原因：将系统参数sec_case_sensitive_logon设置成FALSE导致。
SQL> show parameter secNAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_securefile string PREFERRED
optimizer_secure_view_merging boolean TRUE
sec_case_sensitive_logon boolean FALSE
原因分析：
PASSWORD_VERSIONS
-----------------
11G 12C
The new Exclusive Mode default for password-based authentication in Oracle 12.2 conflicts with case-insensitive password configurations. All user login fails with ORA-1017 after upgrade to 12.2 (文档 ID 2075401.1)
http://docs.oracle.com/database/121/NETRF/sqlnet.htm#NETRF2016
具体内容如下：
The ability for a client to authenticate depends on the DBA_USERS.PASSWORD_VERSIONS value on the server for that account.
Note the following implications of setting the value to 12 or 12a:
-
The setting SEC_CASE_SENSITIVE_LOGON=FALSE must not be used because case insensitivity requires the use of the 10G password version. If it is set as FALSE, then user accounts and secure roles become unusable because Exclusive Mode excludes the use of the 10G password version. The SEC_CASE_SENSITIVE_LOGONinitialization parameter enables or disables case sensitivity for passwords.
Note:
The use of the Oracle instance initialization parameter SEC_CASE_SENSITIVE_LOGON is deprecated in favor of setting the SQLNET.ALLOWED_LOGON_VERSION_SERVER parameter to 12 or 12a to ensure that passwords are treated in a case-sensitive fashion.
SQL> alter system set sec_case_sensitive_logon=TRUE;
System altered.
SQL> conn linfy/linfy@orclpdb
Connected.
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