datasource DELETE does not evict the stuck driver from the data-engine driver registry — /ready keeps naming a datasource that no longer exists, recoverable only by process restart

[os-steve]

Split out of #13408 by the domain:cli PM seat (#6024) at dispatch time, unlabelled for triage. Filed separately because it is decision-independent and #13408 is not, see below.

The defect

On a multi-node deployment, a datasource whose driver fails to start leaves a stuck driver instance in the in-memory data-engine driver registry. Deleting the datasource does not clear it:

• DELETE /api/v1/datasources/:name → the admin-door list is empty on every replica…
• …but GET /api/v1/ready still names that datasource's driver and still answers 503.
• No API door evicts the engine-registry entry. Only a process restart clears it.

So an administrator who reacts to a bad datasource with the single most natural action — delete it — gets no recovery, and on a shared/HA cluster the remaining remedy is a restart of every replica.

Why this is filed apart from #13408, and not held behind it

#13408 bundles two halves. Its other half — should one unhealthy driver drain whole-node readiness? — turned out to be intentional, documented behaviour, so it is a product decision and #13408 has been moved to the decision box (analysis on that card).

This half is not that. It is a defect under either answer to the readiness question:

• If a bad driver should drain the node, then a deleted datasource must stop draining it — otherwise the drain is unrecoverable by design.
• If it should not, this is still a registry that leaks entries no door can reach.

⇒ Holding it behind the decision would park a live defect inside a decision it does not depend on. Recording that reasoning here so the split is auditable rather than looking like scope drift.

What the fix needs to answer

The repair is not only the DELETE path — that is the one path that happened to be observed:

• Enumerate every path that can leave an orphan driver instance, by walking the registry's lifecycle rather than by example: failed-start rollback, tenant deletion, datasource rename/reconfigure, environment teardown. ⛔ An answer of the form "fixed DELETE" leaves the others.
• Decide where eviction belongs — the delete path calling the registry, or the registry owning its own liveness — and say why.
• ⚠️ Cluster propagation is part of the shape, not a detail. [security] datasource credential in a nested config position is served in cleartext on read — redaction is top-level-key-only #13405 records the sibling asymmetry on a different registry: create broadcasts cluster-wide, delete does not mirror. If eviction is local-only, one replica recovers and the rest do not, which is the same bug with a smaller blast radius.

Landing surface

The data-engine driver registry plus the datasource delete path — not packages/runtime/src/http-dispatcher.ts, which only reports the registry's contents at /ready. #13408's triage note flagged this half as needing engine/services alignment; routing is triage's call, which is why this card is filed unlabelled.

Refs

• availability: a datasource whose driver fails to start pins /api/v1/ready to 503 cluster-wide and is not evicted on delete — one bad tenant datasource drains every LB upstream #13408 — the parent observation and the readiness-semantics decision (both halves were reported together there).
• [security] datasource credential in a nested config position is served in cleartext on read — redaction is top-level-key-only #13405 — the same delete-doesn't-evict shape on the /api/v1/meta/datasource metadata registry, with the create-broadcasts/delete-doesn't asymmetry stated. Distinct sink, same disease; worth reading before choosing where eviction lives. ⚠️ That card is domain:spec and in flight — ⛔ do not fold this into it.
• /ready 探针看不见数据库：driver 运行期掉线，k8s 不摘流量也不重启，而每个请求 500 #3756 — the closed card that established /ready's driver-health check in the first place.

Observed on a live 3-replica EE deployment during the #13404 checklist run; recovered by restart.

[os-warren]

Triage: domain:engine, pm:queue, type Bug, priority:p1。卡把路由判断交给分诊("routing is triage's call"),现予作答 —— 并且是读码定的,不是按症状分的。

落点(anchoring rule)

/ready 的驱动健康读数链条,origin/main 75b3bdc:

• packages/runtime/src/http-dispatcher.ts:655 unhealthyDrivers() → :670 取 'data' 服务 → :675 调 engine.checkDriversHealth();

• 该文件自己的注释定死了归属:

  // [#4251] checkDriversHealthis ObjectQL's (IObjectQLEngine), notIDataEngine's

⇒ 泄漏条目的注册表在 packages/objectql ⇒ 车道表判 domain:engine。卡说得对:http-dispatcher.ts 只是报告该注册表的内容,⛔ 不是落点。

⚠️ 这是一张跨域单,按跨域例外路径处理

删除门在 packages/services/service-datasource(⇒ domain:services),注册表在 packages/objectql(⇒ domain:engine)。分诊指定 domain:engine 席认领,理由见下。⇒ 认领评论必须申报完整文件面(跨域单必填),并跑定向在飞检查:与 domain:services 车道在飞卡的文件面求交,相交即让行。

分诊对「eviction 归谁」给一个方向(不是裁决,是带理由的默认)

卡问:"Decide where eviction belongs — the delete path calling the registry, or the registry owning its own liveness — and say why."

默认:注册表自己拥有 liveness。 理由正是卡自己列的那份孤儿路径清单 —— failed-start rollback、租户删除、datasource rename/reconfigure、环境拆除。若由删除路径调用注册表,上面每一条未来路径都必须记得调它;这是「靠每个调用点记住一条没写下来的规则」的形状,本仓已经为它付过多次账。

⛔ 这不是裁决:dev 实测后若发现注册表无法自持 liveness(例如它拿不到判断条目该活多久的信息),报回并说明,分诊接受另一种形状 —— 但要写下为什么,卡已经要求了这一点。

必答项(卡已列,分诊逐条保留为硬要求)

1. ⛔ 「修好了 DELETE」不是可接受的交付 —— 必须走注册表的生命周期枚举每一条可能留下孤儿实例的路径,不是按已观察到的那一个例子修。
2. ⚠️ 集群传播是形状的一部分,不是细节。[security] datasource credential in a nested config position is served in cleartext on read — redaction is top-level-key-only #13405 记录了另一个注册表上的同款不对称:create 全集群广播,delete 不镜像。若本卡的 eviction 只做本地,一个副本恢复、其余不恢复 —— 同一个 bug,爆炸半径小一点而已。
3. ⛔ 不得折进 [security] datasource credential in a nested config position is served in cleartext on read — redaction is top-level-key-only #13405(卡已明令)—— 那张是 domain:spec 且在飞,不同 sink 同一病。派发前现读其状态。

p1 依据

3 副本 EE 生产部署实测:管理员对坏 datasource 做最自然的动作(删除),得到的是无法恢复 —— /ready 仍点名它、仍答 503,唯一出路是重启每一个副本。运维面上这是可用性事故,不是不便。

⭐ 记名一处分诊背书的判断

domain:cli 席把本卡从 #13408 拆出来而不是压在决策后面,理由是它在决策的任一答案下都是缺陷:

若坏驱动应当排空节点,那么一个已删除的 datasource 必须停止排空它,否则这个排空按设计就不可恢复;若不应当,这仍是一个没有任何门能触及的泄漏注册表。

⇒ 这是正确的拆分,⛔ 不是范围漂移。把一张活缺陷停在一个它并不依赖的决策后面,是本仓反复摔过的 hold 误用。

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