[BUG] CPU suddently spikes

[yurividal]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

Every couple of days, this container suddenly spikes on CPU usage, for no apparent reason. The logs don't show anything.

Restarting te container is the only way to fix this and bring CPU usage back to normal.

Is there a way to make it more verbose logging, so that I can try to understand what the container is doing when the CPU spikes?!

As mentioned, nothing shows on the container logs, nor on the Unifi Application Logs.

Expected Behavior

CPU Usage should remain stable, unless on periods of database cleanup, or upgrades.
Logs should be more detailed.

Steps To Reproduce

Run container for a few days, observe CPU usage.

Environment

- OS:
- How docker service was installed:

CPU architecture

x86-64

Docker creation

services:
  unifi-network-application:
    image: lscr.io/linuxserver/unifi-network-application:latest
    container_name: unifi-network-application
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Europe/London
      - MONGO_USER=unifi
      - MONGO_PASS=<redacted>
      - MONGO_HOST=unifi-db
      - MONGO_PORT=27017
      - MONGO_DBNAME=unifi-db
      - MONGO_TLS=false
    volumes:
      - ./data:/config
    restart: always
    mac_address: <redacted>
    networks:
      homelab-lan:
        ipv4_address: <redacted>
      unifi-controller:
      homelab-internal:
    depends_on:
      - unifi-db

  unifi-db:
    image: docker.io/mongo:4.4
    container_name: unifi-db
    volumes:
      - ./database/data:/data/db
      - ./init-mongo.js:/docker-entrypoint-initdb.d/init-mongo.js:ro
    restart: always
    networks:
      - unifi-controller

networks:
  homelab-lan:
    external: true
  unifi-controller:
    driver: bridge
  homelab-internal:
    external: true

Container logs

[migrations] started
[migrations] no migrations found
───────────────────────────────────────

      ██╗     ███████╗██╗ ██████╗
      ██║     ██╔════╝██║██╔═══██╗
      ██║     ███████╗██║██║   ██║
      ██║     ╚════██║██║██║   ██║
      ███████╗███████║██║╚██████╔╝
      ╚══════╝╚══════╝╚═╝ ╚═════╝

   Brought to you by linuxserver.io
───────────────────────────────────────

To support LSIO projects visit:
https://www.linuxserver.io/donate/

───────────────────────────────────────
GID/UID
───────────────────────────────────────

User UID:    1000
User GID:    1000
───────────────────────────────────────
Linuxserver.io version: 8.6.9-ls69
Build-date: 2024-11-12T17:34:23+00:00
───────────────────────────────────────
    
[custom-init] No custom files found, skipping...
[ls.io-init] done.
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter INFO: destroy called
[migrations] started
[migrations] no migrations found
usermod: no changes
───────────────────────────────────────

      ██╗     ███████╗██╗ ██████╗
      ██║     ██╔════╝██║██╔═══██╗
      ██║     ███████╗██║██║   ██║
      ██║     ╚════██║██║██║   ██║
      ███████╗███████║██║╚██████╔╝
      ╚══════╝╚══════╝╚═╝ ╚═════╝

   Brought to you by linuxserver.io
───────────────────────────────────────

To support LSIO projects visit:
https://www.linuxserver.io/donate/

───────────────────────────────────────
GID/UID
───────────────────────────────────────

User UID:    1000
User GID:    1000
───────────────────────────────────────
Linuxserver.io version: 8.6.9-ls69
Build-date: 2024-11-12T17:34:23+00:00
───────────────────────────────────────
    
[custom-init] No custom files found, skipping...
[ls.io-init] done.

[github-actions]

Thanks for opening your first issue here! Be sure to follow the relevant issue templates, or risk having this issue marked as invalid.

[yurividal]

WAN Usage also seemed to have spiked at the same time. So, seems like the container was downloading something?

[j0nnymoe]

Have you checked what process is causing that usage within the container?

[yurividal]

Have you checked what process is causing that usage within the container?

It didnt occur to me to do that.
would a simple "top" inside the container shell give me that?

I'll have to wait until the next time it happens, might be a few days

[yurividal]

@j0nnymoe it did it again, at precisely the same time today. 11:09 AM.

top, from inside the container shows java as being the process using 100% of the CPU

[yurividal]

This is the full command, and it runs as user abc:

java -Xmx1024M -Dlog4j2.formatMsgNoLookups=true -Dfile.encoding=UTF-8 -Djava.awt.headless=true -Dapple.awt.UIElement=true -XX:+UseParallelGC -XX:+ExitOnOutOfMemoryError -XX:+CrashOnOutOfMemoryError --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.time=ALL-UNNAMED --add-opens java.base/sun.security.util=ALL-UNNAMED --add-opens java.base/java.io=ALL-UNNAMED --add-opens java.rmi/sun.rmi.transport=ALL-UNNAMED -jar /usr/lib/unifi/lib/ace.jar start

[yurividal]

when digging deeper into the tree, seems to be related to "schedule-analyt" ?

[LinuxServer-CI]

This issue has been automatically marked as stale because it has not had recent activity. This might be due to missing feedback from OP. It will be closed if no further activity occurs. Thank you for your contributions.

[LRG-Pasty]

Would you automatically mark as no issue you didnt respond to Yurvidal's submission

[j0nnymoe]

It's a bot. Unfortunately I can't really see why this would happen, seems like something is configured within unifi to run - we just package what unifi release.

[yurividal]

Yeah, I have basically checked everywhere in the container to try to find what is triggering the java file to run, but couldn't find anything.
Interestingly, it now runs for several hours. Every day, starting at 11:04AM and goes all the way to 6 something PM.
I have disabled the automatic database backups in Unifi console, but thats not it.