{"record":{"id":"7f979380266f3a24","repo":"nats-io/nats-server","slug":"processroutedoriginclustermsgargs-parse-error-s","errorCode":null,"errorMessage":"processRoutedOriginClusterMsgArgs Parse Error: '%s'","messagePattern":"processRoutedOriginClusterMsgArgs Parse Error: '(.+?)'","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"server/route.go","lineNumber":217,"sourceCode":"\t\t\t\tstart = i\n\t\t\t}\n\t\t}\n\t}\n\tif start >= 0 {\n\t\targs = append(args, arg[start:])\n\t}\n\n\tvar an []byte\n\tif c.kind == ROUTER {\n\t\tif an = c.route.accName; len(an) > 0 && len(args) > 2 {\n\t\t\targs = append(args[:2], args[1:]...)\n\t\t\targs[1] = an\n\t\t}\n\t}\n\tc.pa.arg = arg\n\tswitch len(args) {\n\tcase 0, 1, 2, 3, 4:\n\t\treturn fmt.Errorf(\"processRoutedOriginClusterMsgArgs Parse Error: '%s'\", args)\n\tcase 5:\n\t\tc.pa.reply = nil\n\t\tc.pa.queues = nil\n\t\tc.pa.hdb = args[3]\n\t\tc.pa.hdr = parseSize(args[3])\n\t\tc.pa.szb = args[4]\n\t\tc.pa.size = parseSize(args[4])\n\tcase 6:\n\t\tc.pa.reply = args[3]\n\t\tc.pa.queues = nil\n\t\tc.pa.hdb = args[4]\n\t\tc.pa.hdr = parseSize(args[4])\n\t\tc.pa.szb = args[5]\n\t\tc.pa.size = parseSize(args[5])\n\tdefault:\n\t\t// args[2] is our reply indicator. Should be + or | normally.\n\t\tif len(args[3]) != 1 {\n\t\t\treturn fmt.Errorf(\"processRoutedOriginClusterMsgArgs Bad or Missing Reply Indicator: '%s'\", args[3])","sourceCodeStart":199,"sourceCodeEnd":235,"githubUrl":"https://github.com/nats-io/nats-server/blob/3a66a489d262bf89b71a71c955c94920394532f3/server/route.go#L199-L235","documentation":"processRoutedOriginClusterMsgArgs splits the route protocol's origin-cluster message arguments and hit the len(args) 0-4 case: too few tokens for even the minimal RMSG origin form, meaning the argument line is malformed (missing subject, optional reply/queues, header size or total size fields). Indicates a corrupted or incompatible route protocol message; for a routed account name an extra token is spliced in, so off-by-one token counts also land here.","triggerScenarios":"Thrown at server/route.go:217 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Check for version mismatch between clustered nats-server peers (older servers emitting a different RMSG arg layout)","Verify no middleware/proxy is mangling the route connection payload","Capture the route traffic to inspect the malformed argument line"],"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"}