{"record":{"id":"c0a8c711a39ccbd6","repo":"grafana/k6","slug":"an-error-occurred-communicating-with-k6-cloud-c0a8c7","errorCode":null,"errorMessage":"an error occurred communicating with k6 Cloud","messagePattern":"an error occurred communicating with k6 Cloud","errorType":"http","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/cloudapi/v6/errors.go","lineNumber":14,"sourceCode":"package cloudapi\n\nimport (\n\t\"errors\"\n\t\"fmt\"\n\t\"net/http\"\n\t\"strings\"\n\n\tk6cloud \"github.com/grafana/k6-cloud-openapi-client-go/k6\"\n)\n\nvar (\n\terrTestNotExists = errors.New(\"load test not found\")\n\terrUnknown       = errors.New(\"an error occurred communicating with k6 Cloud\")\n)\n\n// ResponseError represents an error cause by talking to the API\ntype ResponseError struct {\n\tResponse *http.Response        `json:\"-\"`\n\tAPIError k6cloud.ErrorApiModel `json:\"error\"`\n}\n\nfunc (e ResponseError) Error() string {\n\terr := e.APIError\n\tmsg := err.Message\n\n\tif err.Target.IsSet() {\n\t\tmsg += \" (target: '\" + *err.Target.Get() + \"')\"\n\t}\n\n\tdetails := make([]string, len(err.Details))\n\tfor i, v := range err.Details {","sourceCodeStart":1,"sourceCodeEnd":32,"githubUrl":"https://github.com/grafana/k6/blob/01ffac6f245854c1b8adc6a69857c76a15f90022/internal/cloudapi/v6/errors.go#L1-L32","documentation":"errUnknown is the v6 cloud client's catch-all for the pathological case where the generated OpenAPI client returns neither a response nor an error (res == nil with err == nil after CheckResponse passed). k6 refuses to dereference a nil response and reports this generic communication failure instead of panicking. It can come back from any v6 call: listProjectsPage, listLoadTestsPage, ListLoadZones, ValidateToken, ValidateOptions, createTest, StartTest, FetchTest, etc.","triggerScenarios":"The cloud service (or an intermediary) returns a 2xx with an empty or undecodable body, so the SDK yields a nil result without an error; keep-alive connection races or proxies returning truncated responses can produce the same nil-response outcome.","commonSituations":"Corporate proxies or service meshes rewriting/truncating responses; transient Grafana Cloud incidents where a 200 carries an empty body; pointing K6_CLOUD_HOST at an endpoint that is not the real cloud API and returns bare 200s.","solutions":["Retry the command — transient empty responses usually do not repeat","Update k6 so the bundled cloud client matches the current API contract","Verify K6_CLOUD_HOST is unset or points at the official https://api.grafana.com/cloudloadtesting (do not override unless instructed)","Test the same call from another network to rule out proxy tampering","If persistent, capture verbose logs (--log-output or K6_LOG_LEVEL=debug) and report to Grafana support"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":["Leave K6_CLOUD_HOST at its default unless Grafana support instructs otherwise","Retry cloud commands once on this generic error — nil-response conditions are almost always transient","If it recurs, capture K6_LOG_LEVEL=debug output and test from a different network to isolate proxy tampering"],"tags":["k6","cloud-api","empty-response","grafana-cloud","unknown-error"],"backgroundTag":"empty-api-response","analyzedSha":"01ffac6f245854c1b8adc6a69857c76a15f90022","analyzedAt":"2026-08-18T03:05:52.393Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T05:18:18.240Z"}