hyperledger/fabric · error

failed sending proposal, due to %s

Error message

failed sending proposal, due to %s

What it means

Returned by joinBySnapshotStatus when the signed proposal cannot be delivered to the peer's endorser service. cc.cf.EndorserClient.ProcessProposal over gRPC failed at the transport/rpc level, and the underlying error is embedded via %s.

Source

Thrown at internal/peer/channel/joinbysnapshotstatus.go:89

		},
	}

	var prop *pb.Proposal
	c, _ := cc.cf.Signer.Serialize()
	prop, _, err = protoutil.CreateProposalFromCIS(common2.HeaderType_ENDORSER_TRANSACTION, "", invocation, c)
	if err != nil {
		return nil, fmt.Errorf("cannot create proposal, due to %s", err)
	}

	var signedProp *pb.SignedProposal
	signedProp, err = protoutil.GetSignedProposal(prop, cc.cf.Signer)
	if err != nil {
		return nil, fmt.Errorf("cannot create signed proposal, due to %s", err)
	}

	proposalResp, err := cc.cf.EndorserClient.ProcessProposal(context.Background(), signedProp)
	if err != nil {
		return nil, fmt.Errorf("failed sending proposal, due to %s", err)
	}

	if proposalResp.Response == nil || proposalResp.Response.Status != http.StatusOK {
		return nil, fmt.Errorf("received bad response, status %d: %s", proposalResp.Response.Status, proposalResp.Response.Message)
	}

	joinbysnapshotStatus := &pb.JoinBySnapshotStatus{}
	err = proto.Unmarshal(proposalResp.Response.Payload, joinbysnapshotStatus)
	if err != nil {
		return nil, fmt.Errorf("cannot query joinbysnapshot status, due to %s", err)
	}
	return joinbysnapshotStatus, nil
}

View on GitHub (pinned to 2736b63f8f)

Solutions

  1. Verify the peer address and port are correct and the peer container/process is up
  2. Supply the peer's TLS CA certificate with --tlsRootCertFile when TLS is enabled
  3. Check network reachability (ping/openssl s_client) and firewall rules for the endorser port
  4. Confirm mutual-TLS client certs match what the peer's TLS CA issued

Example fix

// before: TLS peer without CA cert -> gRPC failure
peer channel joinbysnapshot -c mychannel --peerAddress peer0:7051
// after
peer channel joinbysnapshot -c mychannel --peerAddress peer0:7051 --tlsRootCertFile /path/peerOrg-ca.crt
Defensive patterns

Strategy: retry

Validate before calling

// pre-flight: reachability check
conn, err := net.DialTimeout("tcp", strings.TrimPrefix(peerAddr, "https://"), 3*time.Second)
if err != nil { return fmt.Errorf("peer endorser unreachable: %w", err) }
conn.Close()

Try / catch

proposalResp, err := endorserClient.ProcessProposal(ctx, signedProp)
if err != nil {
    // retry with backoff for transient gRPC failures; surface TLS/addr config errors immediately
    return nil, fmt.Errorf("failed sending proposal, due to %s", err)
}

Prevention

When it happens

Trigger: EndorserClient.ProcessProposal(context.Background(), signedProp) returns a non-nil error — TLS handshake failure, connection refused, peer unreachable, gRPC timeout, or server rejecting the client identity.

Common situations: Peer not running or wrong address in --peerAddress; TLS enabled on peer but no --tlsRootCertFile supplied; DNS/firewall blocking the port; client certificate not trusted by the peer (mutual TLS).

Understand the failure class

Background: ECONNREFUSED and "connection refused" / "could not connect to server" errors: what they mean and how to fix them — this error's family across 44 libraries.

Related errors

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/e2b27212ac16061a. Report an issue: GitHub.