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STATUS_TOO_MANY_OPENED_FILES
The remote server or redirector reached an open-file limit
This status is specific to remote-drive handling. The client cannot create another remote open because the server, session, redirector, or legacy protocol has exhausted the number of file handles it can represent.
Count opens by session and process instead of treating the message as local disk exhaustion. Leaked handles, large fan-out, and applications that keep directories open can hit the limit. Closing unrelated local files or increasing memory without locating the constrained table may not change the result.
What to inspect
- Measure open files by client session, share, and process.
- Look for handles whose lifetime exceeds the associated request or user session.
- Reduce concurrency or correct leaks before changing server limits.
References
- Microsoft Sysinternals: Handle
- Microsoft Open Specifications: SMB error classes and codes
- Microsoft Open Specifications: NTSTATUS values
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