What does HRESULT 0x80040E50 (DB_E_BADSOURCEHANDLE) mean?

 
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DB_E_CHAPTERNOTRELEASED DB_E_PARAMUNAVAILABLE

DB_E_BADSOURCEHANDLE

Source handle is invalid

Exact value and result class

DB_E_BADSOURCEHANDLE has unsigned value 2147749456 (0x80040E50) and signed 32-bit value -2147217840. AllStat describes it as “Source handle is invalid”. In this result, a provider receives a source handle that is invalid for the current source object or operation; the public text does not identify a single owning API.

The high bit is set, so DB_E_BADSOURCEHANDLE is a failure HRESULT. Its facility is 4 (FACILITY_ITF) and its low code is 3664 (0x0E50). For DB_E_BADSOURCEHANDLE, these fields identify an interface-defined result family; they do not identify the provider instance, method, object generation or partial effects.

Contract boundary

For DB_E_BADSOURCEHANDLE, storage-object access transfers COM interface pointers for long or object-valued data. For DB_E_BADSOURCEHANDLE, some providers allow only one live storage object for a row or source, and every returned handle or interface remains scoped to the object and operation that created it.

Investigation of DB_E_BADSOURCEHANDLE should start with the row, source handle and every open ISequentialStream, IStream or provider-specific storage interface. Capture DB_E_BADSOURCEHANDLE before ADO, ATL, .NET or a database abstraction layer replaces the native HRESULT with a generic exception.

Conditions that specifically lead to this result

  • Cause 1 for DB_E_BADSOURCEHANDLE: the handle was released or never initialized.
  • Cause 2 for DB_E_BADSOURCEHANDLE: the handle belongs to another provider object or generation.
  • Cause 3 for DB_E_BADSOURCEHANDLE: a numeric copy of a provider-owned handle crossed an invalid lifetime boundary.

Evidence to collect

A useful DB_E_BADSOURCEHANDLE event records provider CLSID and version, process architecture, interface IID and method, object correlation ID, transaction state and the immediately preceding HRESULT. When recording DB_E_BADSOURCEHANDLE data involving BLOB contents, object URLs and storage metadata, use types, lengths, hashes or redacted identifiers rather than secrets or complete business data.

  • Evidence 1 for DB_E_BADSOURCEHANDLE: the exact IID and method accepting the source handle.
  • Evidence 2 for DB_E_BADSOURCEHANDLE: the object that originally issued the handle.
  • Evidence 3 for DB_E_BADSOURCEHANDLE: creation, transfer and release events for that handle.

Diagnostic sequence

  1. Capture raw 0x80040E50 and symbolic DB_E_BADSOURCEHANDLE at the native call boundary.
  2. Identify the exact failing stage for DB_E_BADSOURCEHANDLE: a provider receives a source handle that is invalid for the current source object or operation; the public text does not identify a single owning API.
  3. Retrieve all OLE DB error records for DB_E_BADSOURCEHANDLE before another COM call replaces thread error information.
  4. Compare the live object state and provider-granted capabilities with the input that produced DB_E_BADSOURCEHANDLE.
  5. Reduce the DB_E_BADSOURCEHANDLE operation to the smallest case that preserves the same storage contract.
  6. Apply one evidence-backed correction for DB_E_BADSOURCEHANDLE and verify that the result is not merely replaced by a neighboring HRESULT.

Corrective actions

  • Action 1 for DB_E_BADSOURCEHANDLE: treat the source handle as opaque and object-scoped.
  • Action 2 for DB_E_BADSOURCEHANDLE: reacquire it from the current source object.
  • Action 3 for DB_E_BADSOURCEHANDLE: remove serialization or cross-object caching of provider handles.

Retry and recovery

Retry rule for DB_E_BADSOURCEHANDLE: retry only with a freshly issued handle whose owner and lifetime are proven. A DB_E_BADSOURCEHANDLE retry is safe only when the relevant input, object generation, capability or external state has changed. Before replaying a modifying call that returned DB_E_BADSOURCEHANDLE, determine whether rows, schema objects or URL resources were partially created or changed.

Do not turn DB_E_BADSOURCEHANDLE into an unbounded retry loop. Preserve cancellation for DB_E_BADSOURCEHANDLE and use a fresh provider object when the failed call may have left local state ambiguous.

Practical scenario

A cache stores a source handle after its view is rebuilt; reacquiring the handle from the new view prevents the invalid-source result. Keeping DB_E_BADSOURCEHANDLE with the method and object state makes this scenario diagnosable instead of reducing it to “database error”.

Difference from nearby HRESULT values

DB_E_BADROWHANDLE identifies an invalid HROW, while DB_E_BADSOURCEHANDLE refers to a different provider-defined source handle. Telemetry and remediation for DB_E_BADSOURCEHANDLE should keep these outcomes distinct.

Developer and operations guidance

Code handling DB_E_BADSOURCEHANDLE should release COM objects in ownership order, retain per-row, per-column or per-property statuses, and log granted capabilities rather than only requested options. While handling DB_E_BADSOURCEHANDLE, opaque values such as HACCESSOR, HROW, HCHAPTER, DBID components and provider handles must remain scoped to the object that issued them.

Operational dashboards for DB_E_BADSOURCEHANDLE should group by provider version, interface, method and normalized failure stage. A DB_E_BADSOURCEHANDLE event must not expose passwords, tokens, full connection strings, unrestricted command text or raw row contents.

Official Microsoft references

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