What does NTSTATUS 0xC000020C (STATUS_CONNECTION_DISCONNECTED) mean?

 
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STATUS_ADDRESS_CLOSED STATUS_CONNECTION_RESET

STATUS_CONNECTION_DISCONNECTED

The transport connection is already disconnected

These statuses describe transport endpoint and connection state. For STATUS_CONNECTION_DISCONNECTED, they can appear below higher-level file sharing, DFS, redirector, RPC, or networking code before the error is translated to Win32 or Winsock form.

The connection object no longer represents an active data path. Higher-level code should treat subsequent I/O as occurring after disconnect, not as an initial connect failure.

For STATUS_CONNECTION_DISCONNECTED, for diagnostics, capture the endpoint address, address family, connection object, local and remote close/reset events, timeout, route, ICMP condition when available, and the higher-level component that issued the transport request.

What to inspect

  • Check who initiated the disconnect.
  • Stop sending new I/O after disconnect notification.
  • Correlate with redirector, DFS, or RPC retry behavior.

References for STATUS_CONNECTION_DISCONNECTED


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