ERROR_LOG_FULL_HANDLER_IN_PROGRESS - 6638 (0x19EE)
A request has already been made to handle the log full condition.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_LOG_FULL_HANDLER_IN_PROGRESS (6638, 0x19EE) indicates that a request has already been made to handle the log full condition. This means that an operation attempting to write to the event log is being deferred because another process or thread is currently handling the log full situation.
Error Details
This error typically occurs when an application or system component attempts to write to the Windows Event Log, but finds that the log has reached its maximum capacity. Instead of failing immediately, the system defers the operation and waits for the handler to complete before proceeding with the write request.
Usage Context
The ERROR_LOG_FULL_HANDLER_IN_PROGRESS error is commonly encountered in scenarios where applications or services attempt to log events, such as application crashes, system errors, or user actions. It can also occur during maintenance operations that involve clearing or managing event logs.
Developer Interpretation
Developers should interpret this error as a temporary condition that does not necessarily indicate an immediate failure but rather a deferral of the logging operation. The developer should ensure that their application handles such conditions gracefully and retries the operation after a suitable delay, if necessary.
Related Errors
ERROR_LOG_FULL(672, 0x2A8): Indicates that the event log has reached its maximum size limit.ERROR_NO_SYSTEM_RESOURCES(1459, 0x5C3): Suggests a more general resource limitation issue.
FAQ
Q: What does the ERROR_LOG_FULL_HANDLER_IN_PROGRESS error mean?
A: It indicates that another process is currently handling the log full condition and deferring your logging request until it completes.
Q: How should I handle this error in my application?
A: You should retry the operation after a suitable delay or implement logic to handle deferred operations gracefully.
Summary
The ERROR_LOG_FULL_HANDLER_IN_PROGRESS (6638, 0x19EE) is an informational error indicating that another process has already been tasked with handling the log full condition. Developers should be prepared to retry logging operations after a delay or implement appropriate logic to manage deferred operations.