hyperledger/fabric · error

[%s] Fabric side handler cannot handle message (%s) while in

Error message

[%s] Fabric side handler cannot handle message (%s) while in ready state

What it means

handleMessageReadyState default case: the handler is in Ready state but received a chaincode message type it has no dispatch case for — an unsupported or unexpected message from the shim at this point in the protocol.

Source

Thrown at core/chaincode/handler.go:231

		go h.HandleTransaction(msg, h.HandleGetHistoryForKey)
	case pb.ChaincodeMessage_QUERY_STATE_NEXT:
		go h.HandleTransaction(msg, h.HandleQueryStateNext)
	case pb.ChaincodeMessage_QUERY_STATE_CLOSE:
		go h.HandleTransaction(msg, h.HandleQueryStateClose)
	case pb.ChaincodeMessage_GET_PRIVATE_DATA_HASH:
		go h.HandleTransaction(msg, h.HandleGetPrivateDataHash)
	case pb.ChaincodeMessage_GET_STATE_METADATA:
		go h.HandleTransaction(msg, h.HandleGetStateMetadata)
	case pb.ChaincodeMessage_PUT_STATE_METADATA:
		go h.HandleTransaction(msg, h.HandlePutStateMetadata)
	case pb.ChaincodeMessage_PURGE_PRIVATE_DATA:
		go h.HandleTransaction(msg, h.HandlePurgePrivateData)
	case pb.ChaincodeMessage_WRITE_BATCH_STATE:
		go h.HandleTransaction(msg, h.HandleWriteBatch)
	case pb.ChaincodeMessage_GET_STATE_MULTIPLE:
		go h.HandleTransaction(msg, h.HandleGetStateMultipleKeys)
	default:
		return fmt.Errorf("[%s] Fabric side handler cannot handle message (%s) while in ready state", msg.Txid, msg.Type)
	}

	return nil
}

type MessageHandler interface {
	Handle(*pb.ChaincodeMessage, *TransactionContext) (*pb.ChaincodeMessage, error)
}

type handleFunc func(*pb.ChaincodeMessage, *TransactionContext) (*pb.ChaincodeMessage, error)

// HandleTransaction is a middleware function that obtains and verifies a transaction
// context prior to forwarding the message to the provided delegate. Response messages
// returned by the delegate are sent to the chat stream. Any errors returned by the
// delegate are packaged as chaincode error messages.
func (h *Handler) HandleTransaction(msg *pb.ChaincodeMessage, delegate handleFunc) {
	startTime := time.Now()
	meterLabels := []string{

View on GitHub (pinned to 2736b63f8f)

Solutions

  1. Check for shim/peer version mismatch and rebuild the chaincode against the matching fabric-contract-api
  2. Restart the chaincode container after fixing the shim
Defensive patterns

Strategy: validation

When it happens

Trigger: Thrown at core/chaincode/handler.go:231 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/6edf1708839b294c. Report an issue: GitHub.