{"record":{"id":"8e8abc75b7c4218b","repo":"hyperledger/fabric","slug":"could-not-read-file-s-8e8abc","errorCode":null,"errorMessage":"could not read file %s","messagePattern":"could not read file (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"msp/configbuilder.go","lineNumber":63,"sourceCode":"\t// OrdererOUIdentifier specifies how to recognize admins by OU\n\tOrdererOUIdentifier *OrganizationalUnitIdentifiersConfiguration `yaml:\"OrdererOUIdentifier,omitempty\"`\n}\n\n// Configuration represents the accessory configuration an MSP can be equipped with.\n// By default, this configuration is stored in a yaml file\ntype Configuration struct {\n\t// OrganizationalUnitIdentifiers is a list of OUs. If this is set, the MSP\n\t// will consider an identity valid only it contains at least one of these OUs\n\tOrganizationalUnitIdentifiers []*OrganizationalUnitIdentifiersConfiguration `yaml:\"OrganizationalUnitIdentifiers,omitempty\"`\n\t// NodeOUs enables the MSP to tell apart clients, peers and orderers based\n\t// on the identity's OU.\n\tNodeOUs *NodeOUs `yaml:\"NodeOUs,omitempty\"`\n}\n\nfunc readFile(file string) ([]byte, error) {\n\tfileCont, err := os.ReadFile(file)\n\tif err != nil {\n\t\treturn nil, errors.Wrapf(err, \"could not read file %s\", file)\n\t}\n\n\treturn fileCont, nil\n}\n\nfunc readPemFile(file string) ([]byte, error) {\n\tbytes, err := readFile(file)\n\tif err != nil {\n\t\treturn nil, errors.Wrapf(err, \"reading from file %s failed\", file)\n\t}\n\n\tb, _ := pem.Decode(bytes)\n\tif b == nil { // TODO: also check that the type is what we expect (cert vs key..)\n\t\treturn nil, errors.Errorf(\"no pem content for file %s\", file)\n\t}\n\n\treturn bytes, nil\n}","sourceCodeStart":45,"sourceCodeEnd":81,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/msp/configbuilder.go#L45-L81","documentation":"readFile is the MSP config utility that loads a file from disk. This error is os.ReadFile's failure (typically ENOENT or EACCES) wrapped with the file path, meaning the MSP configuration references a file that does not exist or is unreadable.","triggerScenarios":"Calling GetLocalMspConfig/GetIdemixMspConfig/loadCertificateAt (or InitCrypto which uses them) with a dir/file path where the signcerts, keystore, cacerts or admincerts file path does not exist or lacks read permission.","commonSituations":"Wrong MSP path passed to peer/orderer config (CORE_PEER_MSPCONFIGPATH), running the process as a user without permissions on the MSP dir, missing signcert file, typo'd path, docker volume not mounted.","solutions":["Verify the path exists: 'ls -l <msp-path>/signcerts <msp-path>/keystore' and fix CORE_PEER_MSPCONFIGPATH or the dir argument","Fix file permissions: 'chown -R <fabric-user> <msp-path>' or chmod 644/600 as appropriate","If running in Docker/K8s, confirm the MSP volume is mounted and the mount path matches the config","Re-generate the MSP directory with cryptogen or fabric-ca if material is missing"],"exampleFix":"// before\nmspConfig, err := GetLocalMspConfig(\"/etc/hyperledger/fabric/msp-missing\", bccsp, \"Org1\")\n// after: verify directory first\nif _, err := os.Stat(\"/etc/hyperledger/fabric/msp/signcerts\"); err == nil {\n    mspConfig, err = GetLocalMspConfig(\"/etc/hyperledger/fabric/msp\", bccsp, \"Org1\")\n}","handlingStrategy":"validation","validationCode":"func fileReadable(path string) error {\n    fi, err := os.Stat(path)\n    if err != nil { return err }\n    if fi.IsDir() { return fmt.Errorf(\"%s is a directory\", path) }\n    f, err := os.Open(path)\n    if err != nil { return err }\n    return f.Close()\n}\n// run on each file under <msp>/signcerts, cacerts, admincerts before InitCrypto","typeGuard":null,"tryCatchPattern":"cert, err := loadCertificateAt(path, id, keystore)\nif err != nil {\n    var pe *fs.PathError\n    if errors.As(err, &pe) && os.IsNotExist(err) {\n        return fmt.Errorf(\"MSP file missing at %s: check CORE_PEER_MSPCONFIGPATH\", pe.Path)\n    }\n    return err\n}","preventionTips":["Verify CORE_PEER_MSPCONFIGPATH exists before starting peer/orderer","Ensure the fabric process user owns or can read the MSP tree","In containers, mount the MSP volume read-only at the exact configured path","Regenerate MSP material with cryptogen instead of manually copying files"],"tags":["filesystem","msp","configuration","file-not-found"],"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"}