What does HRESULT 0x0004D006 (XACT_S_MADECHANGESINFORM) mean?

XACT_S_MADECHANGESINFORM

Transaction sink changed resources and wants another look

XACT_S_MADECHANGESINFORM is HRESULT 315398 (0x0004D006) from winerror.h. The documented description is “The sink is for the moment and wishes the transaction to proceed, but if other changes are made following this return by other event sinks then this sink wants another chance to look.” The severity bit indicates a nonfailure result, but the value carries a specific condition that must not be collapsed into plain S_OK.

In the COM transaction and MSDTC protocol, this result means that the sink is for the moment and wishes the transaction to proceed, but if other changes are made following this return by other event sinks then this sink wants another chance to look. Before reporting completion, the caller must reconcile the code-specific state transition and every usable output.

What must be true before accepting it

Verify that the sink’s changes are included and it is recalled if subsequent sinks modify relevant state. Without that proof, this result can mask a caller error even though HRESULT failure severity is not set.

Reconcile side effects associated with this result before compensation or a second invocation is attempted.

Where the status is encountered

• This result can be returned during ITransaction commit or abort processing; log the exact method and object state instead of interpreting the constant outside that contract.
• It can be returned during resource-manager enlistment and coordinated outcomes; log the exact method and object state instead of interpreting the constant outside that contract.
• It can be returned during transaction event-sink notification passes; log the exact method and object state instead of interpreting the constant outside that contract.

Evidence to preserve

• Preserve sink order and generation.
• Preserve resources changed by this sink.
• Preserve later sink changes.
• Preserve inform-pass count.
• Preserve convergence or cycle detection.

Correct handling and recovery

Track change generations and schedule another inform pass only after a later modification. Protect against endless mutual changes between sinks.

Practical scenario

Two policy sinks adjust related values. The first returns this status, is recalled after the second changes state, and confirms the combined values converge.

Difference from nearby results

Correctly separating it from neighboring values selects the proper continuation and cleanup path.

References

• Microsoft: COM transaction status codes — official Microsoft material relevant to this HRESULT.
• Microsoft: ITransaction::Commit
• Microsoft: ITransaction::Abort
• Microsoft: HRESULT values