test(reliability): add connect/disconnect soak load test (Week 4)

[Harxhit]

Note: authored by Claude (Anthropic) via Claude Code. Not yet executed against a live backend — results section is a placeholder, not fabricated.

---

Summary by cubic

Adds a connect/disconnect soak load test to validate that the signaling server releases resources cleanly under sustained connection churn. No server code changes; this is test tooling only.

• The driver (load-test/connect-disconnect-soak.js) churns connect → optional joinRoom → disconnect cycles, reporting latency percentiles, error counts, and throughput.
• Leak detection is server-side: compare backend RSS and mediasoup/socket-map counts before and after the run; they should return to baseline after the settle window.
• load-test/results/CONNECT-DISCONNECT-SOAK.md documents the run procedure, CLI arguments, and the leak-detection methodology.
• Not yet run against a live backend, so the results table is a placeholder, not fabricated numbers.

^{Written for commit fb09e59. Summary will update on new commits.}

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[sonarqubecloud]

Quality Gate failed

Failed conditions
7.6% Duplication on New Code (required ≤ 3%)
B Security Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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[cubic-dev-ai]

2 issues found across 2 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="load-test/connect-disconnect-soak.js">

<violation number="1" location="load-test/connect-disconnect-soak.js:139">
P2: When `--join true` is used, this branch only sends `joinRoom` before disconnecting, so it never allocates a viewer transport or consumer. Run the remaining viewer signaling steps in this soak, or narrow the cleanup claim to room-viewer state.</violation>

<violation number="2" location="load-test/connect-disconnect-soak.js:258">
P2: When connections or joins fail, this command still exits with status 0, so CI or automation cannot detect a failed soak. Exit nonzero when cycles are incomplete or any connect/join error is recorded.</violation>
</file>

<sub>Reply with feedback, questions, or to request a fix.

Re-trigger cubic</sub>

[cubic-dev-ai]

P2: When --join true is used, this branch only sends joinRoom before disconnecting, so it never allocates a viewer transport or consumer. Run the remaining viewer signaling steps in this soak, or narrow the cleanup claim to room-viewer state.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At load-test/connect-disconnect-soak.js, line 139:

<comment>When `--join true` is used, this branch only sends `joinRoom` before disconnecting, so it never allocates a viewer transport or consumer. Run the remaining viewer signaling steps in this soak, or narrow the cleanup claim to room-viewer state.</comment>

<file context>
@@ -0,0 +1,261 @@
+
+    results.connectMs.push(performance.now() - connectStart);
+
+    if (JOIN) {
+      try {
+        const { response, latencyMs } = await ackWithTimeout(
</file context>

[cubic-dev-ai]

P2: When connections or joins fail, this command still exits with status 0, so CI or automation cannot detect a failed soak. Exit nonzero when cycles are incomplete or any connect/join error is recorded.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At load-test/connect-disconnect-soak.js, line 258:

<comment>When connections or joins fail, this command still exits with status 0, so CI or automation cannot detect a failed soak. Exit nonzero when cycles are incomplete or any connect/join error is recorded.</comment>

<file context>
@@ -0,0 +1,261 @@
+    }
+  }
+
+  process.exit(0);
+}
+
</file context>