What does HRESULT 0x80040201 (EVENT_E_ALL_SUBSCRIBERS_FAILED) mean?

EVENT_E_ALL_SUBSCRIBERS_FAILED

Meaning

Windows documents EVENT_E_ALL_SUBSCRIBERS_FAILED as “An event was unable to invoke any of the subscribers”. In practical terms, it is returned when the COM+ Events service dispatches an event but every selected subscriber invocation fails.

Evidence to collect

• Capture 1: event class CLSID, interface and method name.
• Capture 2: each subscriber CLSID, subscription ID and individual HRESULT.
• Capture 3: delivery mode, security identity and activation log for every attempted subscriber.

Where the failure belongs

This result belongs to COM+ Events catalog and delivery. COM+ Events separates publishers, event classes, subscriptions and subscribers through catalog records. A useful diagnosis therefore follows both the catalog relationship and the eventual subscriber invocation. The relevant condition is that the COM+ Events service dispatches an event but every selected subscriber invocation fails.

Likely causes

• Possible cause 1: all subscriber components reject or throw during the event method.
• Possible cause 2: activation or security fails for each persistent subscriber.
• Possible cause 3: publisher filtering selects only unhealthy subscribers.

Diagnostic sequence

1. Confirm that the observed path matches this condition: the COM+ Events service dispatches an event but every selected subscriber invocation fails.

Correct handling and retry

• Corrective action 1: repair subscriber-specific activation or method failures and retain per-subscriber diagnostics.
• Corrective action 2: quarantine a persistently failing subscription instead of hiding aggregate failure.
• Corrective action 3: test the event contract with one subscriber at a time.

Retry guidance. Retry only when delivery semantics allow duplicate events and subscriber failures were transient; attach an event ID so subscribers can deduplicate. When retrying, avoid deliver an event twice, modify the wrong catalog object or hide partial subscriber completion.

Difference from nearby HRESULTs

EVENT_S_SOME_SUBSCRIBERS_FAILED is partial success; it means no selected subscriber completed successfully.

Developer and operational guidance

Practical scenario

A configuration event targets three subscribers whose service accounts all lost launch rights; restoring those rights changes it to successful delivery.

Official Microsoft references

• Microsoft: generic COM error codes
• Microsoft: COM+ Events
• Microsoft: publishing a COM+ event