ORA-01017: Invalid Username/Password; Logon Denied

Introduction
Common Causes
Troubleshooting Steps
Examples
Conclusion

Introduction

ORA-01017 is an Oracle error that occurs when attempting to log into an Oracle database with an invalid username or password combination. This error can prevent users from accessing the database and is commonly encountered during login attempts.

Common Causes

ORA-01017 can be caused by various factors, including:
  • Incorrect Username or Password: Entering an incorrect username or password.
  • Case Sensitivity: Oracle usernames and passwords are case-sensitive, so mistyping the case can lead to ORA-01017.
  • Expired Password: If the password has expired, using the old password will result in ORA-01017.
  • Locked Account: Accounts may be locked due to security policies or multiple failed login attempts.
  • Database Configuration Issues: Problems with database configuration or connectivity issues can also cause ORA-01017.

Troubleshooting Steps

To resolve ORA-01017, follow these steps:
  1. Verify Username and Password: Double-check the username and password for correctness.
  2. Check Case Sensitivity: Ensure that you are using the correct case for the username and password.
  3. Reset Password: If the password has expired or is suspected to be incorrect, reset it using Oracle tools or contact the database administrator.
  4. Unlock Account: If the account is locked, unlock it using administrative privileges.
  5. Check Database Configuration: Ensure that the database is up and running, and there are no connectivity issues.

Examples

Example 1: Incorrect Username


SQL> CONNECT invalid_username/password@dbname

Attempting to log in with an incorrect username will result in ORA-01017.

Example 2: Case Sensitivity Issue


SQL> CONNECT UserName/password@dbname

Using the wrong case for the username will also trigger ORA-01017.

Conclusion

ORA-01017: Invalid Username/Password; Logon Denied is a common Oracle error that occurs due to authentication issues during login attempts. By understanding the causes and following the troubleshooting steps provided, you can effectively resolve this error and successfully log into your Oracle database.

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Last updated in July, 2024

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