What does HRESULT 0x80041682 (FDAEMON_E_FATALERROR) mean?

 
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FDAEMON_E_FATALERROR

A critical document-filtering error aborted the operation

FDAEMON_E_FATALERROR is the failure HRESULT 0x80041682 (-2147215742 signed; 2147751554 unsigned). Its severity bit is 1, facility is 4 (FACILITY_ITF), and code is 0x1682. AllStat describes it as “A critical error occurred during document filtering. Consult system administrator.”

Contract and failing stage

FDAEMON_E_FATALERROR belongs to legacy Windows content indexing and is returned while running the filter daemon around a handler or internal indexing stage that cannot continue safely. The exact condition is: a severe handler crash, corrupted state, invariant violation or service-side failure terminates filtering beyond one recoverable extraction error. For FDAEMON_E_FATALERROR, this stage matters because converting the result to a generic COM failure removes the information needed to choose the owner and retry policy.

For FDAEMON_E_FATALERROR, this value belongs to the legacy filter daemon and content-indexing pipeline. For FDAEMON_E_FATALERROR, it identifies failure while extracting or committing indexed content, so query syntax changes do not repair it. For FDAEMON_E_FATALERROR, preserve the document, filter handler and catalog generation that owned the work item. For FDAEMON_E_FATALERROR, current IFilter documentation clarifies handler extraction contracts, while the daemon HRESULT remains tied to the legacy content-indexing pipeline and its catalog generation.

Conditions that produce it

  • Retrying FDAEMON_E_FATALERROR with the same crash or WER record leaves the decisive contract violation intact.
  • FDAEMON_E_FATALERROR can appear when faulting module disagrees with the state expected while running the filter daemon around a handler or internal indexing stage that cannot continue safely.
  • For FDAEMON_E_FATALERROR, a stale or transformed document URL/path can make the component observe that a severe handler crash, corrupted state, invariant violation or service-side failure terminates filtering beyond one recoverable extraction error.
  • For FDAEMON_E_FATALERROR, an incomplete filter CLSID and bitness hides the distinction needed to separate this HRESULT from a later catalog or service failure.
  • For FDAEMON_E_FATALERROR, changes in last daemon event before termination between validation and execution can reproduce the result even when the user-visible input looks unchanged.

The strongest hypothesis for FDAEMON_E_FATALERROR must account for the operation—running the filter daemon around a handler or internal indexing stage that cannot continue safely—and the documented condition. For FDAEMON_E_FATALERROR, an unindexed document is only the outcome; it does not identify the handler, resource, partition generation, change list or word-list stage that failed.

Evidence to preserve

  • For FDAEMON_E_FATALERROR, use crash or WER record to test whether the failure belongs to parsing, execution, indexing or capability negotiation.
  • For FDAEMON_E_FATALERROR, preserve faulting module before objects or work items are released.
  • For FDAEMON_E_FATALERROR, associate document URL/path with the exact UTC timestamp and correlation identifier.
  • For FDAEMON_E_FATALERROR, compare failing and known-good values for filter CLSID and bitness under the same provider or handler version.
  • For FDAEMON_E_FATALERROR, record the source and normalization path of last daemon event before termination, not only its display form.
  • For FDAEMON_E_FATALERROR, use document identity and type to test whether the failure belongs to parsing, execution, indexing or capability negotiation.

Evidence for FDAEMON_E_FATALERROR should reflect what the component actually received. For FDAEMON_E_FATALERROR, hash document content while retaining file type, size, handler CLSID, extraction stage, block counts and catalog generation.

Diagnostic sequence

  1. Capture crash or WER record and faulting module at the call boundary that returns FDAEMON_E_FATALERROR.
  2. For FDAEMON_E_FATALERROR, confirm the operation reached running the filter daemon around a handler or internal indexing stage that cannot continue safely with the intended document URL/path.
  3. For FDAEMON_E_FATALERROR, perform the decisive check: preserve crash reports, service events, document identity, filter registration and the last successful extraction boundary.
  4. For FDAEMON_E_FATALERROR, reduce the case until changing filter CLSID and bitness alone changes the HRESULT or proves it irrelevant.
  5. For FDAEMON_E_FATALERROR, apply the recovery only after verifying last daemon event before termination; preserve the original result for comparison.

A useful control for FDAEMON_E_FATALERROR changes one dimension at a time. For FDAEMON_E_FATALERROR, run a copied document through the same filter version in an isolated queue and compare the exact extraction or commit stage with a known-good document type.

Recovery and retry

Quarantine the triggering document or handler, repair the verified component and restart only after evidence is captured. Retry FDAEMON_E_FATALERROR only after the responsible input or state changes and the previous operation has completed or been cancelled. For FDAEMON_E_FATALERROR, retry only after resource pressure, handler behavior, work generation or catalog storage state changes and stale work is discarded.

What the code does not prove

FDAEMON_E_FATALERROR does not prove that all documents or all filters are affected; preserve the triggering work item, handler and catalog generation before broad recovery. Without code-specific evidence for FDAEMON_E_FATALERROR, the value also cannot identify which wrapper, configuration, handler or service transition introduced the condition.

Related HRESULT values

FILTER_E_ACCESS and format-specific failures can be document-level; this value identifies a fatal daemon path. For FDAEMON_E_FATALERROR, keep the symbolic HRESULT beside the stage name in telemetry because nearby constants may require different owners, user messages and retry rules despite the same visible symptom.

Developer and administrator guidance

For FDAEMON_E_FATALERROR, retain the document identity, filter CLSID/version/bitness, daemon event, catalog generation and retry or quarantine history. For FDAEMON_E_FATALERROR, do not log credentials or unrestricted document content. Before rebuilding catalogs or reregistering every filter for FDAEMON_E_FATALERROR, isolate the document, handler and failed work generation.

Practical scenario

One malformed container repeatedly crashes an old filter DLL. Reproducing against a copy and disabling only that handler prevents a fleet-wide restart loop. A regression test for FDAEMON_E_FATALERROR should assert the decisive evidence, change only the responsible condition, and include one neighboring HRESULT so future code cannot collapse distinct failures into a generic message.

Official Microsoft references

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