fix: memory leak fixes for nextjs.

Addresses high memory usage by adding gzip compression to nginx (removing it from nextjs)
socket cleanup handling, and tRPC client optimizations.

Ref: https://github.com/homarr-labs/homarr/issues/3759

.gitignore

@@ -71,4 +71,6 @@ en.d.json.ts
 
 # personal agent config
 AGENTS.md
-.opencode
+.opencode
+.claude/CLAUDE.md
+.claude/settings.json

Dockerfile

@@ -52,6 +52,7 @@ COPY --from=builder /app/packages/db/migrations ./db/migrations
 # Automatically leverage output traces to reduce image size
 # https://nextjs.org/docs/advanced-features/output-file-tracing
 COPY --from=builder /app/apps/nextjs/.next/standalone ./
+COPY apps/nextjs/socket-cleanup.cjs ./apps/nextjs/socket-cleanup.cjs
 COPY --from=builder /app/apps/nextjs/.next/static ./apps/nextjs/.next/static
 COPY --from=builder /app/apps/nextjs/public ./apps/nextjs/public
 COPY scripts/run.sh ./run.sh

apps/nextjs/next.config.ts

@@ -19,6 +19,7 @@ const withNextIntl = createNextIntlPlugin({
 
 const nextConfig: NextConfig = {
   output: "standalone",
+  compress: false, // Workaround for vercel/next.js#89091 - zlib retains ServerResponse after client disconnect, causing CLOSE-WAIT socket leak
   reactStrictMode: true,
   // react compiler breaks mantine-react-table, so disabled for now
   //reactCompiler: true,

apps/nextjs/socket-cleanup.cjs

@@ -0,0 +1,27 @@
+// Periodic cleanup of zombie CLOSE-WAIT sockets in Next.js standalone mode.
+// Workaround for vercel/next.js#89091 — AfterContext retains ServerResponse
+// after client disconnect, leaving sockets in CLOSE-WAIT indefinitely.
+//
+// Usage: node --require ./socket-cleanup.cjs server.js
+//   or:  NODE_OPTIONS="--require /app/socket-cleanup.cjs" node server.js
+
+const INTERVAL_MS = 60_000; // Check every 60 seconds
+
+setInterval(() => {
+  let destroyed = 0;
+  for (const handle of process._getActiveHandles()) {
+    if (
+      handle.constructor?.name === "Socket" &&
+      handle.localPort === 3000 &&
+      handle.readyState === "writeOnly" &&
+      !handle._httpMessage &&
+      handle.bytesWritten === 0
+    ) {
+      handle.destroy();
+      destroyed++;
+    }
+  }
+  if (destroyed > 0) {
+    console.log(`[socket-cleanup] Destroyed ${destroyed} zombie socket(s)`);
+  }
+}, INTERVAL_MS).unref(); // unref() so this timer doesn't prevent process exit

apps/nextjs/src/app/[locale]/_client-providers/trpc.tsx

@@ -7,7 +7,7 @@ import { ReactQueryDevtools } from "@tanstack/react-query-devtools";
 import { ReactQueryStreamedHydration } from "@tanstack/react-query-next-experimental";
 import {
   createWSClient,
-  httpBatchStreamLink,
+  httpBatchLink,
   httpLink,
   isNonJsonSerializable,
   loggerLink,
@@ -90,7 +90,7 @@ export function TRPCReactProvider(props: PropsWithChildren) {
               url: getTrpcUrl(),
               headers: createHeadersCallbackForSource("nextjs-react (form-data)"),
             }),
-            false: httpBatchStreamLink({
+            false: httpBatchLink({
               transformer: superjson,
               url: getTrpcUrl(),
               maxURLLength: 2083, // Suggested by tRPC: https://trpc.io/docs/client/links/httpBatchLink#setting-a-maximum-url-length

nginx.conf

@@ -3,6 +3,12 @@ events {
 }
 
 http {
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript image/svg+xml;
+    gzip_min_length 1000;
+    gzip_proxied any;
+    gzip_vary on;
+
     server {
         listen 7575;
         listen [::]:7575;

scripts/run.sh

@@ -51,7 +51,7 @@ TASKS_PID=$!
 node apps/websocket/wssServer.cjs &
 WSS_PID=$!
 
-node apps/nextjs/server.js &
+node --require apps/nextjs/socket-cleanup.cjs apps/nextjs/server.js &
 NEXTJS_PID=$!
 
 # Function to handle SIGTERM and shut down services