removing the socket cleanup completely, the original fixes prevent the CLOSE_WAITS from even appearing now:

[10:20:20] rss=292.3MiB  LISTEN=1
[10:20:25] rss=292.3MiB  LISTEN=1
[10:20:31] rss=310.6MiB  LISTEN=1 TIME_WAIT=118
[10:20:36] rss=336.7MiB  LISTEN=1 TIME_WAIT=283
[10:20:41] rss=336.2MiB  LISTEN=1 TIME_WAIT=453
[10:20:47] rss=370.5MiB  LISTEN=1 TIME_WAIT=633
[10:20:52] rss=371.1MiB  LISTEN=1 TIME_WAIT=804
[10:20:58] rss=396.4MiB  LISTEN=1 TIME_WAIT=976
[10:21:03] rss=417.8MiB  LISTEN=1 TIME_WAIT=1196
[10:21:08] rss=425.8MiB  LISTEN=1 TIME_WAIT=1260
[10:21:14] rss=425.6MiB  LISTEN=1 TIME_WAIT=1260
[10:21:19] rss=425.6MiB  LISTEN=1 TIME_WAIT=1260
[10:21:24] rss=425.6MiB  LISTEN=1 TIME_WAIT=1260
[10:21:30] rss=425.6MiB  LISTEN=1 TIME_WAIT=1199
[10:21:35] rss=425.6MiB  LISTEN=1 TIME_WAIT=1085
[10:21:41] rss=425.6MiB  LISTEN=1 TIME_WAIT=970
[10:21:46] rss=425.6MiB  LISTEN=1 TIME_WAIT=684
[10:21:51] rss=425.6MiB  LISTEN=1 TIME_WAIT=520
[10:21:57] rss=288.0MiB  LISTEN=1 TIME_WAIT=398
[10:22:02] rss=288.0MiB  LISTEN=1 TIME_WAIT=113
[10:22:07] rss=288.0MiB  LISTEN=1
[10:22:13] rss=288.0MiB  LISTEN=1
[10:22:18] rss=288.0MiB  LISTEN=1

no more CLOSE_WAIT sockets

setting the v8 heap to 1GB will still allow gc to trigger, gently and then more aggressively as the heap usage gets close to 1GB. Even 512Mb would be fine...

Author: KimP0ssible-no

Dockerfile

@@ -52,7 +52,6 @@ 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 --from=builder /app/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/socket-cleanup.cjs

@@ -51,7 +51,7 @@ TASKS_PID=$!
 node apps/websocket/wssServer.cjs &
 WSS_PID=$!
 
-node --max-old-space-size=1024 --expose-gc --require apps/nextjs/socket-cleanup.cjs apps/nextjs/server.js &
+node --max-old-space-size=1024 apps/nextjs/server.js &
 NEXTJS_PID=$!
 
 # Function to handle SIGTERM and shut down services