{"record":{"id":"04e21d25551bbec8","repo":"hyperledger/fabric","slug":"error-reading-updated-config","errorCode":null,"errorMessage":"error reading updated config","messagePattern":"error reading updated config","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/configtxlator/main.go","lineNumber":207,"sourceCode":"\n\treturn nil\n}\n\nfunc computeUpdt(original, updated, output *os.File, channelID string) error {\n\torigIn, err := io.ReadAll(original)\n\tif err != nil {\n\t\treturn errors.Wrapf(err, \"error reading original config\")\n\t}\n\n\torigConf := &cb.Config{}\n\terr = proto.Unmarshal(origIn, origConf)\n\tif err != nil {\n\t\treturn errors.Wrapf(err, \"error unmarshalling original config\")\n\t}\n\n\tupdtIn, err := io.ReadAll(updated)\n\tif err != nil {\n\t\treturn errors.Wrapf(err, \"error reading updated config\")\n\t}\n\n\tupdtConf := &cb.Config{}\n\terr = proto.Unmarshal(updtIn, updtConf)\n\tif err != nil {\n\t\treturn errors.Wrapf(err, \"error unmarshalling updated config\")\n\t}\n\n\tcu, err := update.Compute(origConf, updtConf)\n\tif err != nil {\n\t\treturn errors.Wrapf(err, \"error computing config update\")\n\t}\n\n\tcu.ChannelId = channelID\n\n\toutBytes, err := proto.Marshal(cu)\n\tif err != nil {\n\t\treturn errors.Wrapf(err, \"error marshaling computed config update\")","sourceCodeStart":189,"sourceCodeEnd":225,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/cmd/configtxlator/main.go#L189-L225","documentation":"Returned by computeUpdt in configtxlator when io.ReadAll fails on the 'updated' config input stream (stdin or uploaded file). The updated configuration could not be read at all — the original config may have parsed fine, but the second input never made it to the diff computation.","triggerScenarios":"--updated path unreadable: missing file, permissions, broken pipe from a producer process, container mount issues.","commonSituations":"A script edits config.json then encodes to updated.pb but the encode step failed silently, leaving an empty or absent file; or wrong path passed to --updated.","solutions":["Confirm the updated file exists, is non-empty, and is readable","Re-run the encode step that produces the updated proto and check its exit code","Fix permissions or correct the --updated path","Test in a local directory before containerized runs"],"exampleFix":"// before\nconfigtxlator compute-update --original orig.pb --updated updt.pb ...\n// after\nls -l updt.pb && configtxlator compute-update --original orig.pb --updated updt.pb ...","handlingStrategy":"validation","validationCode":"if [ ! -r \"$UPDATED\" ] || [ ! -s \"$UPDATED\" ]; then echo \"updated config missing/unreadable\" >&2; exit 1; fi","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Check the encode step's exit code before compute-update","test -s to catch empty files","Use set -euo pipefail in shell scripts"],"tags":["io","file","configtxlator","fabric"],"backgroundTag":"file-read-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"}