8535ae0c2f
A modern-era `subscriptions/listen` is a long-lived request: the first message on its stream must be `notifications/subscriptions/acknowledged`, and the JSON-RPC `result` for the listen id is reserved as the graceful-closure marker. A server that answers the listen request with a bare `result` is saying "acknowledged and closed in the same breath" — the SDK settles the subscription `graceful` and rejects the pending `listen()`. The Inspector read that rejection as an ordinary drop: eight re-lists over roughly a minute, the badge flickering `Reconnecting…`, and a final bare `Stream ended` that said nothing about why. Accepting the message was never wrong — it is a well-formed graceful-closure response. The silence was. - `core/mcp/subscriptionAck.ts` owns the predicate. The SDK gives this close no code of its own — it is the same `SdkError(ConnectionClosed)` any pre-ack close carries — so the predicate reads the message, since the alternative is refusing to retry a genuinely transient drop. - The condition is deterministic, so the stream ends on the first occurrence instead of spending the whole backoff run. Both routes are covered: the one a subscribe/unsubscribe reaches, and the one a reconnect reaches when an acknowledged stream drops and the server has since started refusing. - A `"never-acknowledged"` status of its own, not `"ended"` — `ended` means an expected close. It surfaces as the thrown error's message, an orange "Not acknowledged" badge, and a notice in the panel. - `subscriptions-never-acknowledged-http.json` reproduces it. It acknowledges the first listen that subscribes to a resource and refuses every one after, which is what makes the badge reachable by hand. Closes #2097 Signed-off-by: cliffhall <cliff@futurescale.com>
16 lines
387 B
JSON
16 lines
387 B
JSON
{
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"serverInfo": {
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"name": "subscriptions-never-acknowledged",
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"version": "1.0.0"
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},
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"resources": [{ "preset": "numbered_resources", "params": { "count": 3 } }],
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"subscriptions": true,
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"listChanged": { "resources": true },
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"transport": {
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"type": "streamable-http",
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"port": 3221,
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"modern": {
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"neverAcknowledgeSubscriptions": "after-first"
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}
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}
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}
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