release: harden plugin deployment and recovery

plugins/plugin-admin/main.go

@@ -44,7 +44,7 @@ import (
 const (
 	pluginID              = "qiu.plugin-admin"
 	subscriptionPluginID  = "qiu.subscription-admin"
-	pluginVersion         = "1.1.0"
+	pluginVersion         = "1.1.1"
 	sessionCookieName     = "plugin_admin_session"
 	maxJSONBytes          = 2 << 20
 	maxPackageBytes       = 128 << 20
@@ -2668,18 +2668,25 @@ func (a *app) startRevision(p *pluginRecord, revisionID, processKey string) (str
 	probe.Endpoint = endpoint
 	var probeErr error
 	attempts := 1
+	probeDelay := 50 * time.Millisecond
+	var startupDeadline time.Time
 	if pluginManifest.Backend.Command != "" {
-		// A freshly spawned process can need a short interval before binding its
-		// port. Retry the probe within the bounded startup window.
-		attempts = 20
+		// A freshly spawned interpreter-backed process can need several seconds
+		// before binding its port (notably on macOS under concurrent test load).
+		// Keep the window bounded while avoiding a fixed one-second flake.
+		attempts = 100
+		startupDeadline = time.Now().Add(5 * time.Second)
 	}
 	for attempt := 0; attempt < attempts; attempt++ {
+		if !startupDeadline.IsZero() && time.Now().After(startupDeadline) {
+			break
+		}
 		probeErr = a.checkPluginHealth(&probe)
 		if probeErr == nil {
 			break
 		}
-		if attempt+1 < attempts {
-			time.Sleep(50 * time.Millisecond)
+		if attempt+1 < attempts && (startupDeadline.IsZero() || time.Now().Add(probeDelay).Before(startupDeadline)) {
+			time.Sleep(probeDelay)
 		}
 	}
 	if probeErr != nil {