{"record":{"id":"7acac4964f0f9b3a","repo":"hyperledger/fabric","slug":"received-nil-proposal-response-7acac4","errorCode":null,"errorMessage":"received nil proposal response","messagePattern":"received nil proposal response","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/peer/lifecycle/chaincode/queryinstalled.go","lineNumber":119,"sourceCode":"\t}\n\n\tproposal, err := i.createProposal()\n\tif err != nil {\n\t\treturn errors.WithMessage(err, \"failed to create proposal\")\n\t}\n\n\tsignedProposal, err := signProposal(proposal, i.Signer)\n\tif err != nil {\n\t\treturn errors.WithMessage(err, \"failed to create signed proposal\")\n\t}\n\n\tproposalResponse, err := i.EndorserClient.ProcessProposal(context.Background(), signedProposal)\n\tif err != nil {\n\t\treturn errors.WithMessage(err, \"failed to endorse proposal\")\n\t}\n\n\tif proposalResponse == nil {\n\t\treturn errors.New(\"received nil proposal response\")\n\t}\n\n\tif proposalResponse.Response == nil {\n\t\treturn errors.New(\"received proposal response with nil response\")\n\t}\n\n\tif proposalResponse.Response.Status != int32(cb.Status_SUCCESS) {\n\t\treturn errors.Errorf(\"query failed with status: %d - %s\", proposalResponse.Response.Status, proposalResponse.Response.Message)\n\t}\n\n\tif strings.ToLower(i.Input.OutputFormat) == \"json\" {\n\t\treturn printResponseAsJSON(proposalResponse, &lb.QueryInstalledChaincodesResult{}, i.Writer)\n\t}\n\treturn i.printResponse(proposalResponse)\n}\n\n// printResponse prints the information included in the response\n// from the server.","sourceCodeStart":101,"sourceCodeEnd":137,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/internal/peer/lifecycle/chaincode/queryinstalled.go#L101-L137","documentation":"InstalledQuerier.Query calls EndorserClient.ProcessProposal and checks the returned ProposalResponse. This error means the gRPC call succeeded but returned a nil ProposalResponse, so there is nothing to inspect for installed chaincodes. It guards against endorsers that return (nil, nil) or a nil message.","triggerScenarios":"ProcessProposal on the _lifecycle QueryInstalledChaincodes proposal returns nil response without a transport error — e.g. misbehaving peer, closed stream, or a stub from a misconfigured endorser client.","commonSituations":"--peerAddress pointing at a non-Fabric or incompatible service; stale connection after peer restart; custom proxy dropping the response body.","solutions":["Confirm --peerAddress/--tlsRootCertFile target a real v2.x Fabric peer","Reconnect (rerun the command) to rule out a stale connection","Query the peer directly, bypassing proxies","Check peer logs for endorsement handling errors"],"exampleFix":null,"handlingStrategy":"retry","validationCode":"// verify connectivity before querying\nconn, err := grpc.Dial(peerAddress, grpc.WithTransportCredentials(creds))\nif err != nil { return err }\n// confirm peer identity via peer channel list or health check first","typeGuard":"func hasProposalResponse(pr *pb.ProposalResponse) bool {\n    return pr != nil\n}","tryCatchPattern":"if err := q.Query(); err != nil {\n    if strings.Contains(err.Error(), \"received nil proposal response\") {\n        time.Sleep(backoff)\n        return retry(q.Query, 3)\n    }\n    return err\n}","preventionTips":["Confirm --peerAddress points at a genuine v2.x Fabric peer","Re-establish connections after peer restarts","Bypass proxies when diagnosing"],"tags":["fabric","lifecycle","grpc-response","nil-response"],"backgroundTag":"nil-proposal-response","analyzedSha":"2736b63f8fd5932511d56fe68b7039d15977f7f6","analyzedAt":"2026-09-04T08:52:36.465Z","contentChangedAt":"2026-09-04T08:52:36.465Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}