Fix misaligned struct member used in atomic operation (#2519)

Author: dswarbrick

.changelog/448aaf1509f448d385e5c243933a39d8.json

@@ -0,0 +1,8 @@
+{
+    "id": "448aaf15-09f4-48d3-85e5-c243933a39d8",
+    "type": "bugfix",
+    "description": "Fix misaligned struct member used in atomic operation. This fixes a panic caused by attempting to atomically access a struct member which is not 64-bit aligned when running on 32-bit arch, due to the smaller sync.Map struct.",
+    "modules": [
+        "service/internal/endpoint-discovery"
+    ]
+}

service/internal/endpoint-discovery/cache.go

@@ -9,12 +9,12 @@ import (
 // based on some key. The data structure makes use of a read write
 // mutex to enable asynchronous use.
 type EndpointCache struct {
-	endpoints     sync.Map
-	endpointLimit int64
 	// size is used to count the number elements in the cache.
 	// The atomic package is used to ensure this size is accurate when
 	// using multiple goroutines.
-	size int64
+	size          int64
+	endpoints     sync.Map
+	endpointLimit int64
 }
 
 // NewEndpointCache will return a newly initialized cache with a limit