{"record":{"id":"25d0d12204b82c0e","repo":"hyperledger/fabric","slug":"reading-config-block-s","errorCode":null,"errorMessage":"reading config block: %s","messagePattern":"reading config block: (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/osnadmin/main.go","lineNumber":111,"sourceCode":"\t\t\treturn \"\", 1, fmt.Errorf(\"reading orderer CA certificate: %s\", err)\n\t\t}\n\t\tif !caCertPool.AppendCertsFromPEM(caFilePEM) {\n\t\t\treturn \"\", 1, errors.New(\"failed to add ca-file PEM to cert pool\")\n\t\t}\n\n\t\ttlsClientCert, err = tls.LoadX509KeyPair(*clientCert, *clientKey)\n\t\tif err != nil {\n\t\t\treturn \"\", 1, fmt.Errorf(\"loading client cert/key pair: %s\", err)\n\t\t}\n\t} else { // TLS disabled\n\t\tosnURL = fmt.Sprintf(\"http://%s\", *orderer)\n\t}\n\n\tvar marshaledConfigBlock []byte\n\tif *configBlockPath != \"\" {\n\t\tmarshaledConfigBlock, err = os.ReadFile(*configBlockPath)\n\t\tif err != nil {\n\t\t\treturn \"\", 1, fmt.Errorf(\"reading config block: %s\", err)\n\t\t}\n\n\t\terr = validateBlockChannelID(marshaledConfigBlock, *joinChannelID)\n\t\tif err != nil {\n\t\t\treturn \"\", 1, err\n\t\t}\n\t}\n\n\tvar marshaledConfigEnvelope []byte\n\tif *configUpdateEnvelopePath != \"\" {\n\t\tmarshaledConfigEnvelope, err = os.ReadFile(*configUpdateEnvelopePath)\n\t\tif err != nil {\n\t\t\treturn \"\", 1, fmt.Errorf(\"reading config updte envelope: %s\", err)\n\t\t}\n\n\t\terr = validateEnvelopeChannelID(marshaledConfigEnvelope, *updateChannelID)\n\t\tif err != nil {\n\t\t\treturn \"\", 1, err","sourceCodeStart":93,"sourceCodeEnd":129,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/cmd/osnadmin/main.go#L93-L129","documentation":"osnadmin wraps any failure to read the file given via --configBlock with this error. os.ReadFile errors (missing file, bad permissions, is-a-directory) are surfaced with their underlying message appended via %s, so the CLI fails fast before validating the block.","triggerScenarios":"Running `osnadmin channel join` with a --configBlock path that does not exist, is unreadable due to file permissions, or points to a directory rather than a file.","commonSituations":"Wrong working directory, typo in the block file path, config block generated in another container/host not mounted, or insufficient read permissions.","solutions":["Verify the path passed to --configBlock exists and is readable (ls -l / cat the file).","Use an absolute path instead of a relative one.","Check file permissions or run as a user with access.","Regenerate the config block if it was deleted or moved."],"exampleFix":"// before\nosnadmin channel join --channelID mychannel --configBlock ./block.pb\n// after\nosnadmin channel join --channelID mychannel --configBlock /absolute/path/to/config.block","handlingStrategy":"validation","validationCode":"path := \"./mychannel.block\"\nif _, err := os.Stat(path); err != nil {\n    return fmt.Errorf(\"config block %s not accessible: %w\", path, err)\n}\nif _, err := os.ReadFile(path); err != nil {\n    return fmt.Errorf(\"config block %s unreadable: %w\", path, err)\n}","typeGuard":"func fileReadable(path string) bool {\n    f, err := os.Open(path)\n    if err != nil { return false }\n    f.Close()\n    return true\n}","tryCatchPattern":"if err := runOsnadmin(); err != nil {\n    if strings.Contains(err.Error(), \"reading config block:\") {\n        log.Fatalf(\"check --configBlock path: %v\", err)\n    }\n}","preventionTips":["Always use absolute paths for --configBlock.","Stat the file before invoking osnadmin.","Keep block files in a stable, mounted location shared with the CLI container.","Run as a user with read access to the artifacts."],"tags":["cli","file-io","hyperledger-fabric"],"backgroundTag":"file-not-found","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"}