{"record":{"id":"d80afa9af166c0dd","repo":"amir20/dozzle","slug":"failed-to-parse-arguments-w-d80afa","errorCode":null,"errorMessage":"failed to parse arguments: %w","messagePattern":"failed to parse arguments: %w","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/cloud/tools_logs.go","lineNumber":28,"sourceCode":"\t\"github.com/amir20/dozzle/internal/container\"\n\tpb \"github.com/amir20/dozzle/proto/cloud\"\n)\n\ntype fetchLogsArgs struct {\n\tContainerID string `json:\"container_id\"`\n\tHost        string `json:\"host_id\"`\n\tStart       string `json:\"start\"`\n\tEnd         string `json:\"end\"`\n\tLevel       string `json:\"level\"`\n\tQuery       string `json:\"query\"`\n\tRegex       string `json:\"regex\"`\n\tInverse     bool   `json:\"inverse\"`\n}\n\nfunc executeFetchContainerLogs(ctx context.Context, argsJSON string, deps ToolDeps) (*pb.CallToolResponse, error) {\n\tvar args fetchLogsArgs\n\tif err := json.Unmarshal([]byte(argsJSON), &args); err != nil {\n\t\treturn nil, fmt.Errorf(\"failed to parse arguments: %w\", err)\n\t}\n\thostID, containerID, note, err := resolveContainerRefRead(args.ContainerID, args.Host, deps)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\tcs, err := deps.HostService.FindContainer(hostID, containerID, deps.Labels)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"container not found: %w\", err)\n\t}\n\n\tstart := time.Now().Add(-1 * time.Hour)\n\tend := time.Now()\n\tif args.Start != \"\" {\n\t\tt, err := time.Parse(time.RFC3339, args.Start)\n\t\tif err != nil {\n\t\t\treturn nil, fmt.Errorf(\"invalid start time format (expected RFC3339): %w\", err)\n\t\t}","sourceCodeStart":10,"sourceCodeEnd":46,"githubUrl":"https://github.com/amir20/dozzle/blob/d9463cbe21874e44ab79db6fa63e746ca7d22928/internal/cloud/tools_logs.go#L10-L46","documentation":"executeFetchContainerLogs unmarshals its JSON arguments into fetchLogsArgs (containerId, host, level, query, regex, start/end times, etc.). Invalid JSON or wrong-typed fields cause json.Unmarshal to fail and the error is wrapped with this message before any container lookup happens.","triggerScenarios":"Calling fetch_container_logs with malformed arguments: unescaped quotes in a regex/query string, non-string values for containerId/host/start/end, or a non-object payload.","commonSituations":"Agents embedding user-provided regex or query text into JSON without escaping; RFC3339 timestamps accidentally passed as numbers; double-encoded argument blobs from intermediate proxies.","solutions":["Escape any user-supplied query/regex strings before embedding them in the JSON arguments.","Validate that all fields are strings per the fetchLogsArgs json tags and the tool schema.","Inspect the wrapped json error's offset/field to find the exact malformed token."],"exampleFix":"// before (unescaped backslash/quote in regex)\n{\"containerId\":\"a1\",\"regex\":\"error \\\"fatal\\\"\"}\n// after\n{\"containerId\":\"a1\",\"regex\":\"error \\\"fatal\\\"\"} with proper JSON escaping: \"error \\\"fatal\\\"\" -> use json.Marshal to build args","handlingStrategy":"validation","validationCode":"const args = { containerId: String(id), host, level, query, regex, start, end };\nconst argsJSON = JSON.stringify(args); // escapes any user-supplied regex/query safely\nJSON.parse(argsJSON); // early check","typeGuard":null,"tryCatchPattern":"try {\n  return await callTool(\"fetch_container_logs\", argsJSON);\n} catch (e) {\n  if (String(e).includes(\"failed to parse arguments\")) {\n    // most likely unescaped user text in query/regex; rebuild with JSON.stringify\n  }\n  throw e;\n}","preventionTips":["Always serialize user-supplied query/regex text through JSON.stringify.","Pass start/end as RFC3339 strings, not numbers.","Validate all fetchLogsArgs fields are strings before dispatch."],"tags":["json","cloud-tools","logs"],"backgroundTag":"json-unmarshal-failed","analyzedSha":"d9463cbe21874e44ab79db6fa63e746ca7d22928","analyzedAt":"2026-09-07T10:08:55.855Z","contentChangedAt":"2026-09-07T10:08:55.855Z","schemaVersion":2},"datasetVersion":"2026-09-16T04:17:20.429Z"}