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PEERDIST_ERROR_CANNOT_PARSE_CONTENTINFO
The supplied content information is malformed.
PEERDIST_ERROR_CANNOT_PARSE_CONTENTINFO is Win32 error 4051 (0xFD3) and belongs to Peer Distribution and BranchCache content information validation. The system description identifies the immediate condition but does not identify the caller, object, policy, device, service instance, or transition that produced it.
Interpret this result at the API boundary that returned it. Capture it before logging, cleanup, or another Windows call can replace the thread-local last-error value. Compare the recorded inputs with the documented precondition for Peer Distribution and BranchCache content information validation rather than starting with a broad system repair.
Where the result appears
- This result can surface during the content information validation stage of a PeerDist publisher or consumer.
- This result can surface during a BranchCache request where the content-information blob is truncated, structurally invalid, or inconsistent with its declared fields.
- It can surface during an API call whose diagnosis depends on preserve the exact blob, length, hashes, segment descriptors, and transport framing.
- It can surface during a recovery path that must discard the malformed metadata and obtain a fresh copy from the authoritative content server.
Likely causes
- the content-information blob is truncated, structurally invalid, or inconsistent with its declared fields.
- the caller made a stale assumption during content information validation.
- the observed PeerDist state no longer matched preserve the exact blob, length, hashes, segment descriptors, and transport framing.
- the wrapper retried before it could discard the malformed metadata and obtain a fresh copy from the authoritative content server.
Diagnostic sequence
Diagnosis of it starts with the exact request type: read, write, create, transition, validation, cancellation, or administrative action. Identify the object generation and subsystem owner, then decide whether the failure happened before side effects, during a partial transition, or after completion. This ordering matters in Peer Distribution and BranchCache content information validation because a blind retry can hide stale state or repeat a non-idempotent change.
- record preserve the exact blob, length, hashes, segment descriptors, and transport framing.
- record the exact PeerDist function involved in content information validation.
- record the object generation used for content information validation.
- record PeerDistSvc status while evaluating the content-information blob is truncated, structurally invalid, or inconsistent with its declared fields.
- record origin fallback behavior before attempting to discard the malformed metadata and obtain a fresh copy from the authoritative content server.
Correlate it with the owning component’s operational log, the Windows System log, and any subsystem trace. Telemetry for this Win32 error should preserve native identifiers such as a path or file ID, handle generation, node or peer identity, policy ID, object version, offset and length, or transaction token. Retain decimal 4051, hexadecimal 0xFD3, and the producing API even when a localized message is also shown.
State boundary to prove
The decisive boundary for this Win32 error is whether the content-information blob is truncated, structurally invalid, or inconsistent with its declared fields. Prove or disprove that proposition using preserve the exact blob, length, hashes, segment descriptors, and transport framing together with the exact PeerDist function involved in content information validation. When observations for this Win32 error disagree, preserve both and inspect the transition between them instead of choosing the more convenient value.
A focused validation for this Win32 error should recreate the relevant part of this situation: a proxy truncates the final bytes of content information, and PeerDist rejects the malformed descriptor before any peer retrieval begins. The negative case should keep the responsible condition unchanged and confirm error 4051; the recovery case should change only that condition and verify a successful result without an unrecorded side effect.
Suggested diagnostic fields
For error 4051, keep winerr_4051_api, winerr_4051_object, winerr_4051_state_before, winerr_4051_request, winerr_4051_first_status, winerr_4051_verification. These fields distinguish the initial state, requested transition, first status, and verified recovery result.
Handling, retry, and recovery
discard the malformed metadata and obtain a fresh copy from the authoritative content server A retry is justified only after the recorded state that produced this specific code has changed.
Retry it only after evidence shows a change in Peer Distribution and BranchCache content information validation. Initialization, asynchronous completion, recall, or service readiness can justify bounded backoff; malformed metadata, invalid identifiers, policy rejection, unsupported versions, and integrity failures require correction. Before repeating a write or configuration operation after it, query completion state explicitly.
What to log for support and telemetry
- log decimal 4051, hexadecimal
0xFD3, and the producing API. - log the target object and observed Peer Distribution and BranchCache content information validation state.
- log caller identity, process and thread IDs, machine or node identity, and UTC time.
- log attempt number, elapsed time, previous result, and any partial side effect.
- retain the first lower-level or component-specific error before Win32 translation.
Difference from nearby codes
The unsupported-version code can describe a valid but newer format; this code says the supplied structure cannot be parsed.
Practical example
A proxy truncates the final bytes of content information, and PeerDist rejects the malformed descriptor before any peer retrieval begins.
Developer and administrator guidance
Code that handles it should keep its Win32 domain visible across exceptions, RPC responses, and JSON or REST wrappers. Administrators should verify the subsystem evidence before changing policy, deleting state, forcing failover, or replacing storage. Recovery is demonstrated only when a test observes 4051, changes the responsible condition, and confirms that the same operation succeeds without hidden data loss.
References
- Microsoft: System Error Codes (4000–5999) — reference for error 4051.
- Microsoft: Peer Distribution API — reference for error 4051.
- Microsoft: peerdist.h API reference — reference for error 4051.
- Microsoft: BranchCache — reference for error 4051.
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