What does Windows error code 4056 (PEERDIST_ERROR_SHUTDOWN_IN_PROGRESS) mean?

PEERDIST_ERROR_SHUTDOWN_IN_PROGRESS

A shutdown operation is already in progress.

PEERDIST_ERROR_SHUTDOWN_IN_PROGRESS is Win32 error 4056 (0xFD8) and belongs to Peer Distribution and BranchCache service or object teardown.

Troubleshooting steps

• Record shutdown initiator, outstanding handles, active requests, and service state.
• Record the exact PeerDist function involved in service or object teardown.

What to verify

Verify whether a new PeerDist operation arrived while shutdown was already draining active work. Check shutdown initiator, outstanding handles, active requests, and service state; record the exact PeerDist function involved in service or object teardown.

Handling, retry, and recovery

Stop accepting new work, wait for documented shutdown completion, then create a fresh object or restart the service if required.

Difference from nearby codes

PEERDIST_ERROR_SERVICE_UNAVAILABLE can occur during startup; this code specifically identifies teardown.

Practical example

A service stop races with a late content request; request admission closes before shutdown starts, eliminating the race.

References

• Microsoft: System Error Codes (4000–5999) — reference for error 4056.
• Microsoft: Peer Distribution API — reference for error 4056.
• Microsoft: peerdist.h API reference — reference for error 4056.
• Microsoft: BranchCache — reference for error 4056.