Fixes MOD-163 (#2952)

* init: correctly type powerstate in crash state

Signed-off-by: Evan Song <theevansong@gmail.com>

* feat: handle oom_killed and exit_code when a server crashes

Signed-off-by: Evan Song <theevansong@gmail.com>

---------

Signed-off-by: Evan Song <theevansong@gmail.com>

apps/frontend/src/pages/servers/manage/[id].vue

@@ -239,6 +239,7 @@
           :is-server-running="isServerRunning"
           :stats="stats"
           :server-power-state="serverPowerState"
+          :power-state-details="powerStateDetails"
           :console-output="throttledConsoleOutput"
           :socket="socket"
           :server="server"
@@ -312,6 +313,8 @@ const ramData = ref<number[]>([]);
 const isActioning = ref(false);
 const isServerRunning = computed(() => serverPowerState.value === "running");
 const serverPowerState = ref<ServerState>("stopped");
+const powerStateDetails = ref<{ oom_killed?: boolean; exit_code?: number }>();
+
 const uptimeSeconds = ref(0);
 const firstConnect = ref(true);
 const copied = ref(false);
@@ -488,7 +491,14 @@ const handleWebSocketMessage = (data: WSEvent) => {
       reauthenticate();
       break;
     case "power-state":
-      updatePowerState(data.state);
+      if (data.state === "crashed") {
+        updatePowerState(data.state, {
+          oom_killed: data.oom_killed,
+          exit_code: data.exit_code,
+        });
+      } else {
+        updatePowerState(data.state);
+      }
       break;
     case "installation-result":
       handleInstallationResult(data);
@@ -606,9 +616,19 @@ const updateStats = (currentStats: Stats["current"]) => {
   };
 };
 
-const updatePowerState = (state: ServerState) => {
-  console.log("Power state:", state);
+const updatePowerState = (
+  state: ServerState,
+  details?: { oom_killed?: boolean; exit_code?: number },
+) => {
+  console.log("Power state:", state, details);
   serverPowerState.value = state;
+
+  if (state === "crashed") {
+    powerStateDetails.value = details;
+  } else {
+    powerStateDetails.value = undefined;
+  }
+
   if (state === "stopped" || state === "crashed") {
     stopUptimeUpdates();
     uptimeSeconds.value = 0;

apps/frontend/src/pages/servers/manage/[id]/index.vue

@@ -35,6 +35,31 @@
             </li>
           </div>
         </div>
+        <div v-else-if="props.serverPowerState === 'crashed'" class="flex flex-row gap-4">
+          <IssuesIcon class="hidden h-8 w-8 text-red sm:block" />
+
+          <div class="flex flex-col gap-2">
+            <div class="font-semibold">{{ serverData?.name }} shut down unexpectedly.</div>
+            <div class="font-normal">
+              <template v-if="props.powerStateDetails?.oom_killed">
+                The server stopped because it ran out of memory. There may be a memory leak caused
+                by a mod or plugin, or you may need to upgrade your Modrinth Server.
+              </template>
+              <template v-else-if="props.powerStateDetails?.exit_code !== undefined">
+                We could not automatically determine the specific cause of the crash, but your
+                server exited with code
+                {{ props.powerStateDetails.exit_code }}.
+                {{
+                  props.powerStateDetails.exit_code === 1
+                    ? "There may be a mod or plugin causing the issue, or an issue with your server configuration."
+                    : ""
+                }}
+              </template>
+              <template v-else> We could not determine the specific cause of the crash. </template>
+              <div class="mt-2">You can try restarting the server.</div>
+            </div>
+          </div>
+        </div>
         <div v-else class="flex flex-row gap-4">
           <IssuesIcon class="hidden h-8 w-8 text-red sm:block" />
 
@@ -169,6 +194,10 @@ type ServerProps = {
   stats: Stats;
   consoleOutput: string[];
   serverPowerState: ServerState;
+  powerStateDetails?: {
+    oom_killed?: boolean;
+    exit_code?: number;
+  };
   isServerRunning: boolean;
   server: Server<["general", "mods", "backups", "network", "startup", "ws", "fs"]>;
 };

apps/frontend/src/types/servers.ts

@@ -167,6 +167,9 @@ export interface WSAuthExpiringEvent {
 export interface WSPowerStateEvent {
   event: "power-state";
   state: ServerState;
+  // if state "crashed"
+  oom_killed?: boolean;
+  exit_code?: number;
 }
 
 export interface WSAuthIncorrectEvent {