could not create a signed Deliver SeekInfo message, somethin

Error message

could not create a signed Deliver SeekInfo message, something is critically wrong

What it means

newHeaderClient builds a signed SeekInfo envelope (requesting block headers starting at blockNumber) via m.requester.SeekInfoHeadersFrom before connecting to the orderer. If signing fails, the code wraps the error with this message because a failure to sign a locally constructed message indicates an internal/critical fault (e.g. missing signing identity) rather than a transient network issue.

Source

Thrown at common/deliverclient/blocksprovider/bft_censorship_monitor.go:398

// newHeaderClient connects to the orderer's delivery service and requests a stream of headers.
// Seek from the largest of the block progress and the last good header from the previous header receiver.
func (m *BFTCensorshipMonitor) newHeaderClient(endpoint *orderers.Endpoint, prevHeaderReceiver *BFTHeaderReceiver) (deliverClient orderer.AtomicBroadcast_DeliverClient, clientCloser func(), err error) {
	blockNumber, blockTime := m.progressReporter.BlockProgress()
	if !blockTime.IsZero() {
		blockNumber++ // If blockTime.IsZero(), we request block number 0, else blockNumber+1
	}

	if prevHeaderReceiver != nil {
		hNum, _, errH := prevHeaderReceiver.LastBlockNum()
		if errH == nil && (hNum+1) > blockNumber {
			blockNumber = hNum + 1
		}
	}

	seekInfoEnv, err := m.requester.SeekInfoHeadersFrom(blockNumber)
	if err != nil {
		return nil, nil, errors.Wrap(err, "could not create a signed Deliver SeekInfo message, something is critically wrong")
	}

	deliverClient, clientCloser, err = m.requester.Connect(seekInfoEnv, endpoint)
	if err != nil {
		return nil, nil, errors.Wrap(err, "could not connect to ordering service")
	}

	return deliverClient, clientCloser, nil
}

View on GitHub (pinned to 2736b63f8f)

Solutions

Ensure the requester was created with a valid signing identity (local MSP / correct user context) before connecting.
Verify certificate/key files exist, are readable, and have not expired.
Recreate the signer/signing identity and retry SeekInfoHeadersFrom; inspect the wrapped inner error for the crypto cause.
If in tests, inject a functioning mock/signer into the requester so envelope signing can succeed.

Example fix

// before
requester := &deliverclient.Requester{} // no signer set
env, err := requester.SeekInfoHeadersFrom(n) // wrapped: 'could not create a signed Deliver SeekInfo message'
// after
signer, err := mspmgmt.GetLocalMSP().GetDefaultSigningIdentity()
if err != nil {
    return fmt.Errorf("no signing identity available: %w", err)
}
requester := deliverclient.NewRequester(channelID, csr, signer, ...)
env, err := requester.SeekInfoHeadersFrom(n)

Defensive patterns

Strategy: try-catch

Validate before calling

if signer == nil {
    return fmt.Errorf("no signing identity loaded; cannot build SeekInfo envelope")
}

Try / catch

hdrCli, closer, err := monitor.newHeaderClient(ep)
if err != nil {
    if strings.Contains(err.Error(), "could not create a signed Deliver SeekInfo message") {
        // crypto/identity fault: reload MSP/user context, then retry with backoff
    }
    return err
}

Prevention

Verify the local MSP and signing identity load successfully at client startup.
Monitor certificate expiry and rotate credentials before they lapse.
Unwrap and log the inner error (errors.Cause) to identify the exact crypto failure.
In tests, always wire a real or mocked signer into the requester.

When it happens

Trigger: launchHeaderReceivers → newHeaderClient when requester.SeekInfoHeadersFrom(blockNumber) returns an error — typically the signer/identity context is missing or the crypto material cannot produce a signature for the SeekInfo envelope.

Common situations: Client identity/MSPEXPIRED or missing signer (crypto material not loaded); expired or unparseable certificates; requester constructed without a signing identity in tests; local MSP misconfiguration on the peer/client.

Related errors

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/fe1fbb6962fbd003. Report an issue: GitHub.