{"record":{"id":"c4f1bc0466189e31","repo":"hyperledger/fabric","slug":"config-update-generation-failure","errorCode":null,"errorMessage":"config update generation failure","messagePattern":"config update generation failure","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/configtxgen/encoder/encoder.go","lineNumber":597,"sourceCode":"\tif err != nil {\n\t\treturn nil, errors.WithMessage(err, \"could not create config template\")\n\t}\n\n\treturn MakeChannelCreationTransactionFromTemplate(channelID, signer, conf, template)\n}\n\n// MakeChannelCreationTransactionFromTemplate creates a transaction for creating a channel.  It uses\n// the given template to produce the config update set.  Usually, the caller will want to invoke\n// MakeChannelCreationTransaction or MakeChannelCreationTransactionWithSystemChannelContext.\nfunc MakeChannelCreationTransactionFromTemplate(\n\tchannelID string,\n\tsigner identity.SignerSerializer,\n\tconf *genesisconfig.Profile,\n\ttemplate *cb.ConfigGroup,\n) (*cb.Envelope, error) {\n\tnewChannelConfigUpdate, err := NewChannelCreateConfigUpdate(channelID, conf, template)\n\tif err != nil {\n\t\treturn nil, errors.Wrap(err, \"config update generation failure\")\n\t}\n\n\tnewConfigUpdateEnv := &cb.ConfigUpdateEnvelope{\n\t\tConfigUpdate: protoutil.MarshalOrPanic(newChannelConfigUpdate),\n\t}\n\n\tif signer != nil {\n\t\tsigHeader, err := protoutil.NewSignatureHeader(signer)\n\t\tif err != nil {\n\t\t\treturn nil, errors.Wrap(err, \"creating signature header failed\")\n\t\t}\n\n\t\tnewConfigUpdateEnv.Signatures = []*cb.ConfigSignature{{\n\t\t\tSignatureHeader: protoutil.MarshalOrPanic(sigHeader),\n\t\t}}\n\n\t\tnewConfigUpdateEnv.Signatures[0].Signature, err = signer.Sign(util.ConcatenateBytes(newConfigUpdateEnv.Signatures[0].SignatureHeader, newConfigUpdateEnv.ConfigUpdate))\n\t\tif err != nil {","sourceCodeStart":579,"sourceCodeEnd":615,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/internal/configtxgen/encoder/encoder.go#L579-L615","documentation":"MakeChannelCreationTransactionFromTemplate wraps any error produced by NewChannelCreateConfigUpdate with the message 'config update generation failure'. It indicates the config update envelope for creating the channel could not be computed from the supplied profile and template (e.g. missing consortium, missing application section, missing org in consortium).","triggerScenarios":"Calling MakeChannelCreationTransaction or MakeChannelCreationTransactionWithSystemChannelContext where NewChannelCreateConfigUpdate fails — typically the wrapped errors 1450–1452 (missing consortium, missing application section, org not in consortium) — so the original cause is available via errors.Unwrap/cause.","commonSituations":"configtxgen channel creation against a system channel whose genesis block doesn't match the profile; misconfigured Consortium/Application sections as in errors 1450–1452; inspecting only this wrapper message and missing the root cause.","solutions":["Inspect the wrapped cause (errors.Cause / %+v formatting) — this is a wrapper; fix the underlying error (missing consortium, missing Application section, or org not in consortium)","Validate the profile in configtx.yaml defines Consortium, Application, and all member orgs consistent with the system channel","Regenerate the system channel genesis block to match the updated configtx.yaml and retry"],"exampleFix":"// before\ntx, err := encoder.MakeChannelCreationTransaction(chID, signer, sysChanGroup, profile)\nif err != nil { return err } // logs only 'config update generation failure'\n// after\nif err != nil { return fmt.Errorf(\"%+v\", err) } // prints wrapped cause (e.g. missing consortium)","handlingStrategy":"try-catch","validationCode":"// Preflight: validate profile vs system channel before calling the API\nif profile.Consortium == \"\" || profile.Application == nil {\n    return errors.New(\"profile must specify a consortium and an application section\")\n}","typeGuard":null,"tryCatchPattern":"tx, err := encoder.MakeChannelCreationTransaction(chID, signer, sysChanGroup, profile)\nif err != nil {\n    // unwrap to see the root cause (missing consortium / application section / org)\n    return fmt.Errorf(\"channel creation failed: %+v\", errors.Unwrap(err))\n}","preventionTips":["Always log the wrapped cause, not just the wrapper message","Validate the profile against the system channel config before generating the transaction","Keep system channel genesis and configtx.yaml in sync (regenerate after edits)"],"tags":["hyperledger-fabric","configtxgen","wrapped-error","channel-creation"],"backgroundTag":"config-update-generation-failed","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"}