WSAESTALE - 10070 (0x2756)

File handle reference is no longer available.

Updated: Feb 21, 2026

Technical Meaning

The WSAESTALE error code, represented by the numeric value 10070 (hexadecimal: 0x2756), indicates that a file handle reference is no longer available. This typically occurs in network programming contexts where file handles are used to manage connections or sockets.

Error Details

This error code is part of the Windows Sockets API (WSA) and is commonly encountered when an operation on a socket fails due to the underlying file handle becoming invalid. The specific context can vary, but generally, it suggests that the system has detected that the reference to the file handle is no longer valid or accessible.

Usage Context

WSAESTALE errors are most likely to occur in scenarios where network operations rely on persistent connections or sockets. This could include server applications, client-server communication, or any application that maintains long-lived socket connections.

Developer Interpretation

When encountering the WSAESTALE error, developers should interpret it as an indication that a previously valid file handle is no longer usable. This can happen due to various reasons such as network disconnection, system resource management, or changes in the underlying state of the connection. Developers are advised to handle this error by closing and reopening connections as necessary.

Related Errors

  • WSAECONNRESET (10054): Indicates that a connection was forcibly closed by the remote host.
  • WSAEWOULDBLOCK (995): Suggests that an operation would block, but it is not directly related to WSAESTALE.
  • WSAEINVAL (22): Indicates that an invalid argument was passed to a function.

FAQ

Q: What does the WSAESTALE error mean?

A: The WSAESTALE error indicates that a file handle reference is no longer available, typically due to the underlying connection becoming invalid. This can occur when network connections are disrupted or when system resources are managed by the operating system.

Q: How should I handle this error in my application?

A: You should close and reopen the affected socket or file handle as necessary. Ensure that your application logic includes appropriate error handling to manage such situations gracefully.

Summary

The WSAESTALE error code is a generic indication of an invalid file handle reference, commonly encountered in network programming scenarios. Developers are advised to handle this error by ensuring proper connection management and robust error handling mechanisms.