ERROR_TOKEN_ALREADY_IN_USE - 1375 (0x55F)

Technical Meaning

This error code indicates that a security token, which is used to represent the identity of a user or process in the Windows operating system, has already been assigned as the primary token for another user or process. A primary token contains all the necessary information about the security context and permissions associated with a user or service.

Error Details

When an application attempts to assign a token as a primary token, it encounters this error if that token is already being used by another entity within the same security session. This can occur in scenarios where multiple processes attempt to use the same token for authentication purposes, leading to conflicts and preventing the operation from proceeding.

Usage Context

This error typically arises when an application or service attempts to change its security context using a function such as ImpersonateLoggedOnUser or SetThreadToken. These functions are commonly used in scenarios where processes need to temporarily assume the identity of another user for specific operations, but they must ensure that no token conflicts occur.

Developer Interpretation

Developers should be aware that this error signifies a conflict with an existing security context. It is important to manage tokens carefully and avoid reusing them as primary tokens within the same session. Ensuring unique token usage can prevent such errors from occurring.

Related Errors

• ERROR_LOGON_FAILURE (0xC000006D): Indicates a failure in logging on, which might be related to token conflicts or incorrect credentials.
• ERROR_ACCESS_DENIED (5): May indicate that the operation was denied due to insufficient permissions, though it is not directly related to token usage.

FAQ

Q: What does ERROR_TOKEN_ALREADY_IN_USE mean?

A: It means a security token is already in use as a primary token by another entity within the same session.

Q: How can I resolve this error?

A: Ensure that tokens are not reused as primary tokens within the same session. Use unique tokens for different processes or operations to avoid conflicts.

Summary

The ERROR_TOKEN_ALREADY_IN_USE (0x55F) error indicates a conflict with an existing security context when attempting to assign a token as a primary token. Developers should manage tokens carefully and ensure that each process uses a unique token within the same session to prevent this error from occurring.