What does HRESULT 0x80040E17 (DB_E_DUPLICATEDATASOURCE) mean?

 
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DB_E_DIALECTNOTSUPPORTED DB_E_CANNOTRESTART

DB_E_DUPLICATEDATASOURCE

Data source object could not be created because the named data source already exists

Exact value and interpretation

DB_E_DUPLICATEDATASOURCE has the unsigned 32-bit value 2147749399 (0x80040E17) and the signed representation -2147217897. AllStat defines the result as “Data source object could not be created because the named data source already exists”. In the concrete failure represented here, a data source creation or registration operation uses a name that already identifies an existing data source.

The high bit is set for DB_E_DUPLICATEDATASOURCE, so it is a failure HRESULT rather than a success or informational status. Its facility field is 4 (FACILITY_ITF) and its low code is 3607 (0x0E17). Those bit fields place DB_E_DUPLICATEDATASOURCE in an interface-defined family, but they do not reveal the provider, object identity, method, rowset generation or command state that produced it.

OLE DB contract boundary

DB_E_DUPLICATEDATASOURCE must be interpreted against this contract: OLE DB objects follow both COM lifetime rules and provider-specific state contracts; open dependents, ownership transfer, aggregation, callbacks and namespace identity must be traced from the exact interface call rather than inferred from a wrapper exception.

Start with the COM object that returned the result and every dependent interface or provider-owned resource involved in the call when investigating DB_E_DUPLICATEDATASOURCE. Preserve DB_E_DUPLICATEDATASOURCE before ADO, ATL, .NET, a database abstraction layer or an application exception replaces it with a generic message; the exact interface and method matter because one OLE DB object can expose several contracts with different preconditions.

Diagnostic sequence

  1. Capture DB_E_DUPLICATEDATASOURCE immediately at the native OLE DB return and obtain the current OLE DB error object before another COM call replaces thread error information.
  2. Identify the exact stage for DB_E_DUPLICATEDATASOURCE: a data source creation or registration operation uses a name that already identifies an existing data source.
  3. For DB_E_DUPLICATEDATASOURCE, compare the live command, rowset, accessor or schema state with the metadata and properties actually granted by the provider.
  4. For DB_E_DUPLICATEDATASOURCE, inspect per-binding, per-property, per-row or per-record statuses whenever the method supplies them; the aggregate result may not identify the rejected element.
  5. For DB_E_DUPLICATEDATASOURCE, reproduce the issue with the smallest command, rowset or definition operation that preserves the same contract boundary.
  6. For DB_E_DUPLICATEDATASOURCE, apply one evidence-backed correction, then verify that the operation succeeds and does not merely change into a nearby HRESULT.

Specific conditions that produce this result

  • Cause 1 for DB_E_DUPLICATEDATASOURCE: the create request is replayed after a partial success.
  • Cause 2 for DB_E_DUPLICATEDATASOURCE: two administrators race to create the same named source.
  • Cause 3 for DB_E_DUPLICATEDATASOURCE: case or normalization rules make apparently different names equivalent.

Evidence to collect before changing the system

A useful DB_E_DUPLICATEDATASOURCE record includes provider CLSID and version, process architecture, interface and method, COM apartment and thread, object correlation ID, transaction state, and the first preceding HRESULT. When DB_E_DUPLICATEDATASOURCE involves object URLs, command trees, data source names, caller identities and copied data, record types, lengths, hashes or redacted identifiers instead of secrets or full business data.

  • Evidence 1 for DB_E_DUPLICATEDATASOURCE: the requested name and provider normalization rules.
  • Evidence 2 for DB_E_DUPLICATEDATASOURCE: existing data source identity and creation metadata.
  • Evidence 3 for DB_E_DUPLICATEDATASOURCE: correlation IDs for concurrent or retried create attempts.

Corrective actions

  • Action 1 for DB_E_DUPLICATEDATASOURCE: treat creation as idempotent when the existing source matches the intended configuration.
  • Action 2 for DB_E_DUPLICATEDATASOURCE: choose a distinct name when the existing object is unrelated.
  • Action 3 for DB_E_DUPLICATEDATASOURCE: serialize create-or-open logic around the provider's naming rules.

Retry and recovery policy

Retry rule for DB_E_DUPLICATEDATASOURCE: retry only with a different name or an idempotent open of the verified existing source. A safe DB_E_DUPLICATEDATASOURCE retry must use a changed input, object generation, provider capability or state transition. If the call returning DB_E_DUPLICATEDATASOURCE could have created, updated, deleted or copied data, determine partial completion before replaying it.

For DB_E_DUPLICATEDATASOURCE, use bounded retries and preserve cancellation. For DB_E_DUPLICATEDATASOURCE, configuration and contract failures should normally fail fast; concurrency, resource or transient state failures may justify retry only after their stated precondition changes.

Difference from related HRESULT values

DB_E_RESOURCEEXISTS applies to an object at a URL, while DB_E_DUPLICATEDATASOURCE specifically concerns a named data source that already exists. Keep these outcomes separate in telemetry and user-facing remediation because DB_E_DUPLICATEDATASOURCE requires a different next action.

Practical incident

A deployment retries after losing the success response and attempts to create the same catalog again; detecting the matching existing object avoids DB_E_DUPLICATEDATASOURCE. The diagnostic value comes from retaining DB_E_DUPLICATEDATASOURCE together with the failing interface and object state, not from reducing every provider result to “database error”.

Implementation guidance

Code handling DB_E_DUPLICATEDATASOURCE should release OLE DB resources in ownership order, preserve every provider error record, and log granted properties rather than only requested properties. When handling DB_E_DUPLICATEDATASOURCE, handles such as HACCESSOR, HROW, HCHAPTER and provider-specific region tokens must never be treated as portable integers across object lifetimes.

When DB_E_DUPLICATEDATASOURCE crosses an abstraction boundary, attach a stable correlation ID and structured fields for the native HRESULT, provider source, interface IID, method, object generation and operation phase. For DB_E_DUPLICATEDATASOURCE, do not log passwords, access tokens, complete SQL text or unrestricted row values merely to make the event easier to search.

Official Microsoft references

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