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FILTER_E_TOO_BIG
The file exceeds the filter size limit
FILTER_E_TOO_BIG is HRESULT 0x80041730 (-2147215568 signed; 2147751728 unsigned). Its severity bit is 1, facility is 4 (FACILITY_ITF for these values), and code field is 0x1730. Standard HRESULT severity rules classify the value as a failure. AllStat describes the value as “File is too large to filter.”
Where the result belongs
This result belongs to admitting a document to filtering before full extraction. The decisive interpretation is that the configured or implementation-specific maximum rejects the object as a whole. Keep the symbolic constant and method stage together in logs; its hexadecimal value alone cannot identify the owning transition or input.
The IFilter contract is stateful: GetChunk selects a chunk, then GetText or GetValue consumes content according to STAT_CHUNK flags. In the result investigation, method order and filter-instance ownership are therefore part of the evidence. This context narrows the responsible component without replacing the code-specific checks below.
Concrete causes
- check file length exceeds the handler limit.
- check expanded container size is larger than the outer file.
- check resource policy caps documents for the filter host.
- check a malformed length field reports an implausible size.
The useful hypothesis for it must explain both admitting a document to filtering before full extraction and the documented condition. Compare the failing case with a control that preserves physical and logical sizes and changes only configured filter limit; this prevents unrelated environment differences from dominating the result test.
Evidence to retain
- Physical and logical sizes; preserve the observation under the result correlation record.
- Configured filter limit; preserve the observation under the result correlation record.
- Container expansion estimate; preserve the observation under the result correlation record.
- Handler version and architecture; preserve the observation under the result correlation record.
Capture physical and logical sizes before releasing objects, closing handles or reconnecting. Retain the raw HRESULT with configured filter limit, component version, UTC timestamp and correlation ID. Bound the result telemetry to diagnostic metadata because document content, credentials and unrestricted query text may be sensitive.
Diagnostic path
- Measure bytes using the same object representation passed to the filter. Associate this observation specifically with this result.
- Check documented and configured size ceilings.
- Compare compressed and expanded sizes for containers.
- Rule out corrupt length metadata before raising limits. Associate this observation specifically with it.
Change one variable per it control run. Preserve the component version and target identity, then alter only the condition described as the configured or implementation-specific maximum rejects the object as a whole. This isolates whether it is causal rather than merely repeatable.
Recovery and retry
Reduce or split the document, select a handler with supported limits, or change policy after capacity review. Retry only after the admitted size changes. Record whether admitting a document to filtering before full extraction produced any content, update or state transition before returning. If completion remains unknown, the path must not replay non-idempotent work until the owner confirms final state.
The retry gate for it should be a concrete change in physical and logical sizes or configured filter limit. A timer alone cannot demonstrate that the result contract condition has changed.
What must not be inferred
It does not imply disk-full conditions and it does not guarantee that a smaller file is structurally valid. Without the call boundary for admitting a document to filtering before full extraction, it also cannot identify which wrapper or configuration layer introduced the condition.
Nearby results
FILTER_E_PARTIALLY_FILTERED means some content was emitted before a limit; it rejects complete filtering. In it telemetry, preserve neighboring constants separately because the same visible symptom may require a different caller action, owner or recovery gate.
Developer and administrator actions
- The result investigation should record At the code boundary, keep physical and logical sizes beside the returned HRESULT.
- The result investigation should record In telemetry, correlate configured filter limit with the target and component generation.
- The result investigation should record For regression coverage, force the documented condition: the configured or implementation-specific maximum rejects the object as a whole.
- The result investigation should record For operations staff, expose the corrective state change rather than a generic retry button.
- The result investigation should record After remediation, validate one known-good control and the original failing case.
Operational example
A huge archive is skipped before chunks are produced. The pipeline stores size-limit telemetry and routes it to a specialized offline extractor. In this scenario, handling it at its real contract boundary prevents the application from collapsing a precise state into an unhelpful generic “search failed” message.
Official Microsoft references
- Microsoft: Content-Indexing values — official contract information relevant to it.
- Microsoft: filter handlers in Windows Search
- Microsoft: testing filter handlers
- Microsoft: IFilter interface
- Microsoft: Filter-Interface values
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