{"record":{"id":"5bbc3722d6b0004a","repo":"crowdsecurity/crowdsec","slug":"failed-to-load-postovflw-parser-patterns-w","errorCode":null,"errorMessage":"failed to load postovflw parser patterns: %w","messagePattern":"failed to load postovflw parser patterns: %w","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"pkg/parser/unix_parser.go","lineNumber":124,"sourceCode":"}\n\nfunc LoadParsers(cConfig *csconfig.Config, hub *cwhub.Hub) (*Parsers, error) {\n\tvar err error\n\n\tpatternDir := cConfig.ConfigPaths.PatternDir\n\tlog.Infof(\"Loading grok library %s\", patternDir)\n\n\tparsers := NewParsers(hub)\n\n\t/* load base regexps for two grok parsers */\n\tparsers.Ctx, err = NewUnixParserCtx(patternDir, cConfig.ConfigPaths.DataDir)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"failed to load parser patterns: %w\", err)\n\t}\n\n\tparsers.PovfwCtx, err = NewUnixParserCtx(patternDir, cConfig.ConfigPaths.DataDir)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"failed to load postovflw parser patterns: %w\", err)\n\t}\n\n\t/*\n\t\tLoad enrichers\n\t*/\n\tlog.Info(\"Loading enrich plugins\")\n\n\tparsers.EnricherCtx, err = Loadplugin()\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"failed to load enrich plugin: %w\", err)\n\t}\n\n\t/*\n\t Load the actual parsers\n\t*/\n\n\tlog.Infof(\"Loading parsers from %d files\", len(parsers.StageFiles))\n","sourceCodeStart":106,"sourceCodeEnd":142,"githubUrl":"https://github.com/crowdsecurity/crowdsec/blob/909b5157986a2b2c2163300fdaef5ed01289f7d2/pkg/parser/unix_parser.go#L106-L142","documentation":"LoadParsers wraps any failure from NewUnixParserCtx (which loads the pattern/hydra data files used by the postoverflow parser stage) into \"failed to load postovflw parser patterns\". Crowdsec cannot run its postoverflow parsing stage without these pattern files (regexes, date formats, etc.), so startup aborts. The wrapped %w contains the underlying cause, typically a missing or unreadable data directory.","triggerScenarios":"Calling LoadParsers (or cscli/crowdsec startup via initCrowdsec) when NewUnixParserCtx(patternDir, cConfig.ConfigPaths.DataDir) fails — usually because the pattern directory or DataDir does not exist, or its pattern files cannot be read.","commonSituations":"Fresh installs where `cscli hub update && cscli hub upgrade` was never run so /var/lib/crowdsec/data is empty; a config pointing ConfigPaths.DataDir to a wrong path; running crowdsec in a container without the data volume mounted; partial hub upgrade that removed pattern files.","solutions":["Run `cscli hub update && cscli hub upgrade` (or `cscli parsers install crowdsecurity/geoip-enrich` equivalents) to populate the data/patterns directory","Verify ConfigPaths.DataDir in config.yaml points to a directory containing the pattern files (e.g. /var/lib/crowdsec/data/) and that the crowdsec user can read them","Check the wrapped error (%w) in the log to see which file open failed and restore that file","If in a container/image, ensure the data directory is copied or mounted correctly"],"exampleFix":"// before (config.yaml)\nconfig_paths:\n  data_dir: /var/lib/crowdsec/dat   # typo\n// after\nconfig_paths:\n  data_dir: /var/lib/crowdsec/data","handlingStrategy":"try-catch","validationCode":"import \"os\"\nfunc dataDirReady(dir string) error {\n  pat := filepath.Join(dir, \"patterns\")\n  if st, err := os.Stat(pat); err != nil || !st.IsDir() {\n    return fmt.Errorf(\"pattern dir missing: %s\", pat)\n  }\n  return nil\n}","typeGuard":null,"tryCatchPattern":"parsers, err := parser.LoadParsers(cfg)\nif err != nil {\n  if strings.Contains(err.Error(), \"postovflw parser patterns\") {\n    log.Fatalf(\"pattern data missing; run 'cscli hub update && cscli hub upgrade': %v\", err)\n  }\n  return err\n}","preventionTips":["Run `cscli hub update && cscli hub upgrade` after install and upgrades","Pin ConfigPaths.DataDir in config and verify it exists in deployment scripts/health checks","Mount/copy the data directory correctly in container images"],"tags":["crowdsec","parser","config","startup"],"backgroundTag":"file-not-found","analyzedSha":"909b5157986a2b2c2163300fdaef5ed01289f7d2","analyzedAt":"2026-09-06T12:27:26.012Z","contentChangedAt":"2026-09-06T12:27:26.012Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}