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RPC_NT_INVALID_TIMEOUT
RPC_NT_INVALID_TIMEOUT is an NTSTATUS value used by the Windows RPC runtime. This status identifies an invalid timeout argument or timeout mode passed to the RPC runtime. It is a local parameter-validation failure: it does not say that a remote call exceeded a valid deadline or that the server was slow.
It differs from RPC_NT_CALL_CANCELLED or a transport timeout because those concern a call that was already active. Here the timeout configuration itself is rejected before it can control call behavior.
The call-timeout setting is invalid before an RPC call is issued
- Log the timeout value, its type and the runtime API that consumes it rather than only logging an application-level duration.
- Verify whether the application is using a documented RPC timeout constant or a raw value with the wrong unit or range.
- Keep this diagnosis separate from listener backlog, endpoint mapping and server load evidence.
References
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