hyperledger/fabric · error

received error while sending message, ending chaincode suppo

Error message

received error while sending message, ending chaincode support stream

What it means

Returned by Handler.ProcessStream when the errChan receives a failure from the asynchronous send side of the chaincode stream. A write to the chaincode runtime failed, so the handler ends the stream wrapped with this context.

Source

Thrown at core/chaincode/handler.go:465

				chaincodeLogger.Debugf("%+v", err)
				return err
			case rmsg.msg == nil:
				err := errors.New("received nil message, ending chaincode support stream")
				chaincodeLogger.Debugf("%+v", err)
				return err
			default:
				err := h.handleMessage(rmsg.msg)
				if err != nil {
					err = errors.WithMessage(err, "error handling message, ending stream")
					chaincodeLogger.Errorf("[%s] %+v", shorttxid(rmsg.msg.Txid), err)
					return err
				}

				go receiveMessage()
			}

		case sendErr := <-h.errChan:
			err := errors.Wrapf(sendErr, "received error while sending message, ending chaincode support stream")
			chaincodeLogger.Errorf("%s", err)
			return err
		case <-keepaliveCh:
			// if no error message from serialSend, KEEPALIVE happy, and don't care about error
			// (maybe it'll work later)
			h.serialSendAsync(&pb.ChaincodeMessage{Type: pb.ChaincodeMessage_KEEPALIVE})
			continue
		}
	}
}

// sendReady sends READY to chaincode serially (just like REGISTER)
func (h *Handler) sendReady() error {
	chaincodeLogger.Debugf("sending READY for chaincode %s", h.chaincodeID)

	chaincodeAdditionalParams := &pb.ChaincodeAdditionalParams{
		UseWriteBatch:          h.UseWriteBatch,
		MaxSizeWriteBatch:      h.MaxSizeWriteBatch,

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Inspect the wrapped send error and chaincode logs
2. Restart the chaincode; tune gRPC keepalive/timeout settings if sends time out repeatedly

When it happens

Trigger: Thrown at core/chaincode/handler.go:465 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/753902fd8740d886. Report an issue: GitHub.