chaincode definition for [%s] is invalid, plugin field must

Error message

chaincode definition for [%s] is invalid, plugin field must be set

What it means

getCDataForCC (invoked via GetInfoForValidate during validation) fetched the chaincode definition from the lifecycle/LSCC, and its validation-plugin field is empty. Since V20 validation requires every chaincode definition to name a validation plugin (default 'vscc'), Fabric returns this error meaning the definition on the ledger is incomplete or was written without required fields.

Source

Thrown at core/committer/txvalidator/v20/plugindispatcher/dispatcher.go:255

func (v *dispatcherImpl) getCDataForCC(channelID, ccid string) (string, []byte, error) {
	qe, err := v.ler.NewQueryExecutor()
	if err != nil {
		return "", nil, errors.WithMessage(err, "could not retrieve QueryExecutor")
	}
	defer qe.Done()

	plugin, args, unexpectedErr, validationErr := v.lcr.ValidationInfo(channelID, ccid, qe)
	if unexpectedErr != nil {
		return "", nil, &commonerrors.VSCCInfoLookupFailureError{
			Reason: fmt.Sprintf("Could not retrieve state for chaincode %s, error %s", ccid, unexpectedErr),
		}
	}
	if validationErr != nil {
		return "", nil, validationErr
	}

	if plugin == "" {
		return "", nil, errors.Errorf("chaincode definition for [%s] is invalid, plugin field must be set", ccid)
	}

	if len(args) == 0 {
		return "", nil, errors.Errorf("chaincode definition for [%s] is invalid, policy field must be set", ccid)
	}

	return plugin, args, nil
}

// GetInfoForValidate gets the ChaincodeInstance(with latest version) of tx, validation plugin and policy
func (v *dispatcherImpl) GetInfoForValidate(chdr *common.ChannelHeader, ccID string) (string, []byte, error) {
	// obtain name of the validation plugin and the policy
	plugin, args, err := v.getCDataForCC(chdr.ChannelId, ccID)
	if err != nil {
		logger.Errorf("Unable to get chaincode data from ledger for txid %s, due to %s", chdr.TxId, err)
		return "", nil, err
	}
	return plugin, args, nil

View on GitHub (pinned to 2736b63f8f)

Solutions

Set the plugin field explicitly (use default 'vscc' for endorsement-policy validation) in the chaincode definition and re-approve/upgrade.
Re-issue the chaincode definition transaction with all required fields populated.
Fix the lifecycle code that persisted the definition so it defaults plugin to 'vscc' when unset.
Restore the definition from a healthy backup/orderer snapshot if ledger data is corrupt.

Example fix

// before (definition JSON)
{ "Name":"mycc", "Version":"1.0", "Policy": ... }  // plugin missing
// after
{ "Name":"mycc", "Version":"1.0", "Plugin":"vscc", "Policy": ... }

Defensive patterns

Strategy: validation

Validate before calling

const def = getChaincodeDefinition(name, version); if (!def.plugin) throw new Error(`definition for ${name} missing plugin; expected 'vscc' or custom plugin`);

Type guard

function hasPlugin(def) { return typeof def?.plugin === 'string' && def.plugin.length > 0; }

Try / catch

try { getInfoForValidate(); } catch (err) { if (/plugin field must be set/.test(err.message)) { /* re-issue definition with plugin set */ } else { throw err; } }

Prevention

Always set Plugin: 'vscc' (or your custom plugin) in definitions.
Never hand-edit LSCC ledger records.
Use standard lifecycle commands for approve/commit.
Back up and verify definitions after upgrades.

When it happens

Trigger: Chaincode definition stored on-chain (via LCCS JSON args or new lifecycle) has an empty plugin name when Dispatch→GetInfoForValidate→getCDataForCC reads it — e.g. an LSCC record hand-written with missing plugin field, or a corrupted/incomplete upgrade.

Common situations: Manually edited or legacy LSCC records migrated from older networks without the plugin field; failed/partial chaincode upgrades leaving incomplete definitions; custom lifecycle implementations that skip plugin defaults.

Related errors

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/6f0d8ef6414b21b7. Report an issue: GitHub.