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sqlnet. Ora-12154 and ora-01017 connection exceptions caused by incorrect ora file settings

2022-07-23 16:01:00 【51CTO】

Recently, I saw a friend connect to the database ORA-12154 、ORA-01017 It's abnormal , In fact, there are many reasons for this anomaly , The following is an introduction sqlnet.ora In file EZCONNECT The influence of parameters on this exception . If you want to use it EZCONNECT How to connect to the database ,Windows On the client side sqlnet.ora Add to file “NAMES.DIRECTORY_PATH=(EZCONNECT)” Information or delete sqlnet.ora file .

Simulate anomalies ：

1、 Delete EZCONNECT

Windows Client delete sqlnet.ora(ORACLE_HOME/network/admin Under the table of contents ) in EZCONNECT Parameters , It is shown as follows ：

       
       C:\Users\Administrator>sqlplus sys/[email protected]:1521/orcl
       
SQL*Plus: Release 19.0.0.0.0 - Production on  Saturday  7 month  23 10:15:06 2022
       
Version 19.3.0.0.0
       
Copyright (c) 1982, 2019, Oracle.  All rights reserved.
       
ERROR:
       
ORA-12154: TNS:  Unable to resolve the specified connection identifier 
       
 Please enter a user name :
       
ERROR: ORA-01017:  user name / Invalid password ;  Login denied 
       
 Please enter a user name :
       
ERROR: ORA-01017:  user name / Invalid password ;  Login denied 
       
SP2-0157:  stay  3  Unable to connect to after attempts  ORACLE,  sign out 
      
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At this point through pl sql Definitely unable to connect to the database ,pl sql The connection mode of is simple connection .

sqlnet.ora Incorrect file settings cause ORA-12154 、ORA-01017 Abnormal connection _sql

Linux The system deletes the server EZCONNECT An error is as follows

       
       [[email protected] admin]$ sqlplus liujun/[email protected]:1521/rmlis
       
SQL*Plus: Release 19.0.0.0.0 - Production on Sat Jul 23 10:41:26 2022
       
Version 19.12.0.0.0
       
Copyright (c) 1982, 2021, Oracle.  All rights reserved.
       
ERROR:
       
ORA-12154: TNS:could not resolve the connect identifier specified
       
Enter user-name: 
       
ERROR:
       
ORA-01017: invalid username/password; logon denied
       
Enter user-name: 
       
ERROR:
       
ORA-01017: invalid username/password; logon denied
       
SP2-0157:
       
unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus
      
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add EZCONNECT, Instant connection OK.

       
       [[email protected] admin]$ sqlplus liujun/[email protected]:1521/rmlis
       
SQL*Plus: Release 19.0.0.0.0 - Production on Sat Jul 23 10:43:23 2022
       
Version 19.12.0.0.0
       
Copyright (c) 1982, 2021, Oracle.  All rights reserved.
       
Last Successful login time: Sat Jul 23 2022 10:38:30 +08:00
       
Connected to:
       
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
       
Version 19.12.0.0.0
      
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explain ： adopt ORA-01017、ORA-12154 The alarm , It's hard to think of sqlnet.ora File exception .

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