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Posted to commits@rocketmq.apache.org by "iloveeyjafjalla (via GitHub)" <gi...@apache.org> on 2026/10/12 04:26:54 UTC
[I] [Bug] Client connection summary counts de-duplicated clients while the page counts connections [rocketmq-dashboard]
iloveeyjafjalla opened a new issue, #6320:
URL: https://github.com/apache/rocketmq-dashboard/issues/6320
### Before Creating the Bug Report
- [x] I have searched the [open issues](https://github.com/apache/rocketmq-dashboard/issues) of this repository and believe that this is not a duplicate.
- [x] This is a defect in RocketMQ Studio, not a usage question and not a defect in another Apache RocketMQ repository.
- [x] I can reproduce this on the current `master` branch, or I have stated the exact version I am running below.
### Studio Version
branch: rocketmq-studio
git commit id: 5e4c39b053c35a5598cc79ff331b8a54e649d7b1
deployed as: built from source - backend run with `java -cp target/classes:<deps> org.apache.rocketmq.studio.StudioApplication`, frontend `npm run dev` in real-data mode
### Runtime Environment
OS: Windows 11 (backend and frontend run on the host)
MySQL: 8.0.46 in Docker Desktop, schema loaded from server/src/main/resources/db/schema.sql
browser (for UI issues): in-app browser (Chromium 141) at 1280x720
### Connected RocketMQ Cluster
RocketMQ version: 5.3.2 (official apache/rocketmq:5.3.2 image)
access mode: Direct to NameServer (127.0.0.1:9876)
deployment: single NameServer + single broker ("broker-a") started from the official image
### Build Toolchain
JDK: Temurin 21.0.12
Maven: 3.9.9
Node.js: 20.19.5
### Describe the Bug
The summary tiles in the connection statistics block are computed from a `Map` keyed by `${type}:${clientId}`, so they count **de-duplicated clients**, while the first tile is labelled `t('clients.title')` - the same string as the page title - and the page subtitle and the table footer both count **connections**.
On a real cluster the two numbers diverge as soon as one client serves more than one group, which is the normal case: a Java client registers its own group *plus* the shared `CLIENT_INNER_PRODUCER`. The value shown is not the connection count and not the unique-client count either - it is the number of distinct (type, clientId) pairs, so a client that is both a producer and a consumer is counted twice. The de-duplicated view already exists in the diagnostics panel below ("unique clients" / "unique addresses"), which reported 4 / 4 while the tile reported 5.
Mock mode hides this: the mock fixture has 15 connections over 15 distinct clients, so both numbers coincide and the existing tests never see the divergence.
### Steps to Reproduce
1. Start Studio against a real broker in Direct mode (backend and frontend from source).
2. Let the console itself open a connection: send one message through 消息查询 → 发送. The pooled producer registers `studio-pool-producer`, `CLIENT_INNER_PRODUCER` and an inner trace producer on the broker.
3. Register the NameServer in 集群管理 → NameServer 注册表 (the clients endpoint requires a registered endpoint), then open 集群管理 → 客户端连接.
4. Compare the page subtitle and the table footer with the summary tiles.
### What Did You Expect to See?
The summary describes the connections the table below lists: 客户端连接 7, Producer 6, Consumer 1, protocol distribution Remoting: 7, and the language/version distribution counted per connection as well. The de-duplicated counts stay where they are already reported: the diagnostics panel.
### What Did You See Instead?
Page subtitle: `客户端连接 — 7 connections`; table footer: `共 7`; the table renders 7 rows.
Summary tiles: 客户端连接 **5** (expected 7), Producer **4** (expected 6), Consumer 1, `Remoting: 5` (expected 7), `Java V5_5_0: 5` (expected 7).
So the same screen presents two different "connection" counts, and the tile value matches no label that can be put on it: it is neither 7 (connections) nor 4 (unique clients).
### Additional Context
- Code: `web/src/pages/cluster/clients.tsx`; the `connectionStats` memo builds a `Map` keyed by `${connection.type}:${connection.clientId ?? connection.address ?? connection.groupOrTopic}` and derives `total` / `producers` / `consumers` / `protocols` / `languageVersions` from it.
- Broker-side ground truth for the same clients (`mqadmin producerConnection` for one topic): 4 connections in `CLIENT_INNER_PRODUCER` + 1 in `studio-pool-producer` + 1 inner-trace producer = 6 producer connections, which matches the 6 rows the table lists.
- The commit that introduced the tiles (45a510af, "feat: add client connection distribution statistics") ships no test that pins the de-duplication, so nothing turned red.
- Verified locally on the same broker: with the fix the tiles report 7 / 6 / 1 / Remoting: 7 while the diagnostics panel keeps 唯一 Client 4 / 唯一地址 4; `ClientsPage.test.tsx` is 25/25 green and the new case fails on the previous code.
- AI assistance: the reproduction, the fix and the regression test were prepared with AI assistance (OpenAI Codex / ZCode). Every claim above was verified against the running stack before it was written down. A pull request referencing this issue is submitted.
### Are You Willing to Submit a Pull Request?
- [x] Yes, I am willing to submit a pull request.
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Re: [I] [Bug] Client connection summary counts de-duplicated clients while the page counts connections [rocketmq-dashboard]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on issue #6320:
URL: https://github.com/apache/rocketmq-dashboard/issues/6320#issuecomment-6280282865
This issue has been automatically closed because there has been no activity for 7 days. If you believe this issue is still relevant, please reopen it with updated information.
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Re: [I] [Bug] Client connection summary counts de-duplicated clients while the page counts connections [rocketmq-dashboard]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] closed issue #6320: [Bug] Client connection summary counts de-duplicated clients while the page counts connections
URL: https://github.com/apache/rocketmq-dashboard/issues/6320
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