{"record":{"id":"bdb055e01b8d8466","repo":"hashicorp/nomad","slug":"error-building-environment-variables-v","errorCode":null,"errorMessage":"error building environment variables: %v","messagePattern":"error building environment variables: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"client/allocrunner/taskrunner/task_runner.go","lineNumber":925,"sourceCode":"\t}\n}\n\nfunc (tr *TaskRunner) assignCgroup(taskConfig *drivers.TaskConfig) {\n\treserveCores := len(tr.taskResources.Cpu.ReservedCores) > 0\n\tp := cgroupslib.LinuxResourcesPath(taskConfig.AllocID, taskConfig.Name, reserveCores)\n\ttaskConfig.Resources.LinuxResources.CpusetCgroupPath = p\n}\n\n// runDriver runs the driver and waits for it to exit\n// runDriver emits an appropriate task event on success/failure\nfunc (tr *TaskRunner) runDriver() error {\n\ttaskConfig := tr.buildTaskConfig()\n\ttr.assignCgroup(taskConfig)\n\n\t// Build hcl context variables\n\tvars, errs, err := tr.envBuilder.Build().AllValues()\n\tif err != nil {\n\t\treturn fmt.Errorf(\"error building environment variables: %v\", err)\n\t}\n\n\t// Handle per-key errors\n\tif len(errs) > 0 {\n\t\tkeys := make([]string, 0, len(errs))\n\t\tfor k, err := range errs {\n\t\t\tkeys = append(keys, k)\n\n\t\t\tif tr.logger.IsTrace() {\n\t\t\t\t// Verbosely log every diagnostic for debugging\n\t\t\t\ttr.logger.Trace(\"error building environment variables\", \"key\", k, \"error\", err)\n\t\t\t}\n\t\t}\n\n\t\ttr.logger.Warn(\"some environment variables not available for rendering\", \"keys\", strings.Join(keys, \", \"))\n\t}\n\n\tval, diag, diagErrs := hclutils.ParseHclInterface(tr.task.Config, tr.taskSchema, vars)","sourceCodeStart":907,"sourceCodeEnd":943,"githubUrl":"https://github.com/hashicorp/nomad/blob/482b49bf1aec006f089bcfc7e632d8f6ac303e5e/client/allocrunner/taskrunner/task_runner.go#L907-L943","documentation":"runDriver failed building the task's environment variables via the env builder (interpolation of job meta, node meta, vault/consul tokens, or template artifacts), so the driver cannot be started with a complete environment.","triggerScenarios":"Thrown at client/allocrunner/taskrunner/task_runner.go:925 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Check logged per-key errors to find which variable failed to interpolate","Verify referenced node attributes, meta keys, and secrets exist","Review template/vault blocks that feed the task env","Fix the job spec references and resubmit"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"482b49bf1aec006f089bcfc7e632d8f6ac303e5e","analyzedAt":"2026-09-04T07:54:14.808Z","contentChangedAt":"2026-09-04T07:54:14.808Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}