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PEER_S_ALREADY_CONNECTED
Peer graph is already connected
PEER_S_ALREADY_CONNECTED is HRESULT 6496256 (0x00632000) from winerror.h. AllStat describes it as “The graph is already connect.” In the Windows Peer-to-Peer graph, group, event, connection, or subscription state, the value reports a nonfailure state that must not be collapsed into plain S_OK.
Accepting this result requires proving the documented state rather than checking only SUCCEEDED(hr).
Where the status is encountered
- Peer Graphing data-store creation and connection; capture the exact API, object, and phase because the same numeric success severity does not define the state by itself.
- Peer group membership and event processing;
- Record subscriptions and offline synchronization;
Keep it attached to the operation that returned it. Interpreting it outside that API contract can turn a normal continuation or partial result into an incorrect retry or false completion.
What must be true before accepting it
Verify that the existing connection is healthy and matches the requested graph and scope. The boundary determines whether the caller continues, waits, falls back, or ends the operation.
Also confirm that returned outputs belong to the current operation generation and were not inherited from an earlier attempt.
Difference from nearby results
PEER_S_ALREADY_A_MEMBER says enrollment exists; this status says the runtime connection is active.
The neighboring result changes whether output is final, more work remains, or fallback is required.
Correct handling and recovery
Reuse it, register needed events, and avoid duplicate connect attempts. Diagnose separately when the connection is stale despite the state.
Continuation after it within the documented state machine is different from restarting the entire operation.
Practical scenario
A component restarts its UI while the graph connection remains alive. It attaches listeners to the existing connection rather than reconnecting.
References
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