seb/hermes-agent
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix(desktop): prevent backend port-squat boot loop and pickPort self-collision

Browse Source 
Two fixes to the Electron desktop launch path, with the port-reservation logic extracted into a unit-tested module:

1. hermes:bootstrap:reset ("Reload and retry") only cleared connectionPromise, leaving the live backend alive; the orphan kept binding PORT_FLOOR (9120) so the next startHermes() hit EADDRINUSE / "Object has been destroyed" and the window looped. Await teardownPrimaryBackendAndWait() so the reset stops the old backend before restarting.

2. pickPort() probes-then-closes a socket before the real bind happens in a separate Python child, so two concurrent spawns (primary + pool backend) could both be handed PORT_FLOOR and one died with EADDRINUSE. The reservation bookkeeping is extracted into electron/port-pool.cjs (PortPool): pickPort() reserves the chosen port until the child exits and releases it on every exit/error/throw-before-spawn path, closing the TOCTOU window.

PortPool is dependency-injected (probe passed in) and socket-free, unit-tested in electron/port-pool.test.cjs (8 cases) and wired into the test:desktop:platforms script.
This commit is contained in:
Mani Saint-Victor, MD
2026-06-09 18:04:22 -04:00
parent a5d05cf30e
commit d4133945b9
4 changed files with 187 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
apps/desktop/package.json
+1 -1
View File
@@ -35,7 +35,7 @@
"test:desktop:nsis": "node scripts/test-desktop.mjs nsis",
"test:desktop:existing": "node scripts/test-desktop.mjs existing",
"test:desktop:fresh": "node scripts/test-desktop.mjs fresh",
"test:desktop:platforms": "node --test electron/bootstrap-platform.test.cjs electron/hardening.test.cjs electron/backend-probes.test.cjs electron/bootstrap-runner.test.cjs electron/connection-config.test.cjs electron/gateway-ws-probe.test.cjs electron/oauth-net-request.test.cjs electron/desktop-uninstall.test.cjs",
"test:desktop:platforms": "node --test electron/bootstrap-platform.test.cjs electron/hardening.test.cjs electron/backend-probes.test.cjs electron/bootstrap-runner.test.cjs electron/connection-config.test.cjs electron/gateway-ws-probe.test.cjs electron/oauth-net-request.test.cjs electron/desktop-uninstall.test.cjs electron/port-pool.test.cjs",
"type-check": "tsc -b",
"lint": "eslint src/ electron/",
"lint:fix": "eslint src/ electron/ --fix",