{
  "slug": "gcloud-dataproc-clusters-create-adds-master-machine-types-b2a49a481404",
  "title": "gcloud dataproc clusters create adds --master-machine-types",
  "tools": [
    "gcloud"
  ],
  "tags": [
    "agent"
  ],
  "introduced_at": "2026-06-30T00:00:00.000Z",
  "announced_at": "2026-06-30T00:00:00.000Z",
  "effective_at": null,
  "date_basis": "source-publication",
  "status": "unknown",
  "how": {
    "incantation": "When creating a Dataproc cluster that needs a specified master machine type, pass `--master-machine-types` with one or more `type=<MACHINE_TYPE>` entries and an optional `rank=<RANK>` to `gcloud dataproc clusters create`.",
    "examples": [
      "gcloud dataproc clusters create <cluster> --region=<region> --master-machine-types=\"type=<MACHINE_TYPE>\"",
      "gcloud dataproc clusters create <cluster> --region=<region> --master-machine-types=\"type=<MACHINE_TYPE_1>,type=<MACHINE_TYPE_2>,rank=<RANK>\""
    ],
    "gotchas": [
      "<cluster> (required): Cluster ID or fully qualified cluster identifier.",
      "--region=<region> (required): Region for the cluster.",
      "--master-machine-types: Machine types for master nodes; defaults to server-specified when omitted.",
      "type=<MACHINE_TYPE> (required): A machine type to use for master nodes; repeat `type=` to provide alternatives.",
      "rank=<RANK>: Optional rank value accepted by the flag; the docs do not explain its effect for master nodes."
    ]
  },
  "why_it_matters": "Create a Dataproc cluster with the required master machine type.",
  "sources": [
    "https://docs.cloud.google.com/sdk/docs/release-notes#57500_2026-06-30",
    "https://docs.cloud.google.com/sdk/gcloud/reference/dataproc/clusters/create"
  ],
  "rank": 0.93031,
  "judge": {
    "publish": true,
    "judge_model": "codex-cli/gpt-6-luna+typesafe/jev-1.13.0",
    "prompt_version": "extract-v7+enrich-v1+judge-v2x3+jev-publish-v1"
  },
  "review_state": "approved",
  "provenance": {
    "run_id": "cloud-20261008",
    "verdict_id": "cloud-20261008:cloud-20261008-f47ce93817a15906-10:gate",
    "evidence_hash": "1fdd9088d25a0e6edc4c036a17a548fbb0969f3ebc5eb2baa124e33e7feecebd"
  },
  "review": {
    "draft_hash": "d5c67920c7f13b28aa4acc192ba681da32326e3c1a0b8843202079a0a98ead72",
    "reviewer": "publication-gate",
    "reviewed_at": "2026-10-07T00:00:00.000Z",
    "decision": "cloud-20261008:gate",
    "reason": "3 of 3 judge runs approved with p_yes >= 0.9 (mean 0.93 >= 0.9; 2 needed) and Jev gave 0.64 (>= 0.6 needed)."
  }
}