ERROR_DRIVER_CANCEL_TIMEOUT (594) - Windows Error Code Reference

Technical Background

ERROR_DRIVER_CANCEL_TIMEOUT is a specific error code that indicates a failure in the driver's ability to cancel an I/O request within the specified time frame. This error typically arises when a driver receives a cancellation signal for an ongoing I/O operation but fails to complete it before the allotted timeout period elapses.

Error Details

Error Name: ERROR_DRIVER_CANCEL_TIMEOUT
Numeric Code: 594 (0x252)
Short Description: {Cancel Timeout} The driver %hs failed to complete a cancelled I/O request in the allotted time.

The error message %hs is a placeholder for the name of the driver that encountered this issue. This code suggests that the driver did not handle cancellation requests appropriately, leading to an operation that exceeded the expected duration.

Common Causes

Invalid Parameter Values: The I/O request parameters might have been incorrect or invalid, causing the driver to fail in processing the cancellation properly.
Incorrect Object Type: The type of object being operated on (file, directory, etc.) may not be compatible with the operation's requirements, leading to a timeout.
Exceeding Limits: There could be limitations imposed by system resources or the driver itself that were exceeded during the I/O request.
Unsupported Operations: Certain operations might not be supported by the driver, resulting in a failure when attempting to cancel an unsupported task.

Real-World Context

This error can occur in various scenarios where drivers are responsible for managing I/O requests. For instance, it could happen during file system operations, network transfers, or device communication protocols that involve asynchronous I/O handling.

Is This Error Critical?

The criticality of this error depends on the context and the specific driver involved. In general, it is a warning that the driver did not handle cancellation requests as expected, which could indicate potential issues with resource management or driver stability.

How to Diagnose

Review Operation Context: Examine the environment in which the I/O request was initiated and ensure all conditions were met for successful operation.
Validate Parameters: Check that all parameters passed to the I/O request are valid and correctly formatted.
Confirm Object Types: Verify that the object types being operated on match the expected requirements of the driver.
Verify Input Data: Ensure that any input data provided is correct and within acceptable limits.
Check Limits or Constraints: Confirm that no system resource limits have been exceeded, such as file handles or memory constraints.

How to Resolve

Correct Parameter Usage: Ensure all parameters are correctly set according to the driver's specifications.
Adjust Operation Context: Modify the operation context if necessary to ensure it aligns with supported operations and resource availability.
Restore Data: If data corruption is suspected, restore from a backup or correct any known issues.
Retry Operation with Valid Inputs: Attempt to retry the I/O request with valid inputs to see if the issue persists.

Developer Notes

Developers should ensure that their drivers handle cancellation requests appropriately and provide adequate error handling mechanisms. This includes setting appropriate timeout values for operations and ensuring that all I/O requests are properly managed, especially in scenarios where cancellation might be necessary.

Related Errors

FAQ

Q: What does the error code 594 mean?

A: The error code 594, or ERROR_DRIVER_CANCEL_TIMEOUT, indicates that a driver failed to complete a cancelled I/O request within the allotted time.

Q: How can I prevent this error from occurring?

A: Ensure proper parameter validation and handling of cancellation requests in your drivers. Implement appropriate timeout values and resource management strategies to avoid such errors.

Summary

ERROR_DRIVER_CANCEL_TIMEOUT is a specific error code that highlights issues with driver behavior when managing I/O request cancellations. Understanding the context, causes, and resolution steps can help in diagnosing and addressing this issue effectively.