{"record":{"id":"1196428a4c0f0317","repo":"nats-io/nats-server","slug":"processroutedheadermsgargs-bad-or-missing-header-s","errorCode":null,"errorMessage":"processRoutedHeaderMsgArgs Bad or Missing Header Size: '%s'","messagePattern":"processRoutedHeaderMsgArgs Bad or Missing Header Size: '(.+?)'","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"server/route.go","lineNumber":359,"sourceCode":"\t\t}\n\n\t\t// Grab header size.\n\t\tc.pa.hdb = args[len(args)-2]\n\t\tc.pa.hdr = parseSize(c.pa.hdb)\n\n\t\t// Grab size.\n\t\tc.pa.szb = args[len(args)-1]\n\t\tc.pa.size = parseSize(c.pa.szb)\n\n\t\t// Grab queue names.\n\t\tif c.pa.reply != nil {\n\t\t\tc.pa.queues = args[4 : len(args)-2]\n\t\t} else {\n\t\t\tc.pa.queues = args[3 : len(args)-2]\n\t\t}\n\t}\n\tif c.pa.hdr < 0 {\n\t\treturn fmt.Errorf(\"processRoutedHeaderMsgArgs Bad or Missing Header Size: '%s'\", arg)\n\t}\n\tif c.pa.size < 0 {\n\t\treturn fmt.Errorf(\"processRoutedHeaderMsgArgs Bad or Missing Size: '%s'\", args)\n\t}\n\tif c.pa.hdr > c.pa.size {\n\t\treturn fmt.Errorf(\"processRoutedHeaderMsgArgs Header Size larger then TotalSize: '%s'\", arg)\n\t}\n\n\t// Common ones processed after check for arg length\n\tc.pa.account = args[0]\n\tc.pa.subject = args[1]\n\tif len(an) > 0 {\n\t\tc.pa.pacache = c.pa.subject\n\t} else {\n\t\tc.pa.pacache = arg[:len(args[0])+len(args[1])+1]\n\t}\n\treturn nil\n}","sourceCodeStart":341,"sourceCodeEnd":377,"githubUrl":"https://github.com/nats-io/nats-server/blob/3a66a489d262bf89b71a71c955c94920394532f3/server/route.go#L341-L377","documentation":"The header-size token of the routed header message failed parseSize (negative result), meaning it is not a valid non-negative decimal size. The raw argument line is echoed; typical causes are a corrupted token or field misalignment due to protocol version differences between route peers.","triggerScenarios":"Thrown at server/route.go:359 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Ensure the header size token is a plain decimal byte count","Align server versions across cluster routes","Rule out in-transit corruption of the route stream"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"3a66a489d262bf89b71a71c955c94920394532f3","analyzedAt":"2026-09-02T04:41:54.247Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}