'Heroku Spring boot Java app show R14 (Memory quota exceeded) with lightweight heap memory used

I have an Heroku app, pretty simple with :

  • one free dyno
  • Heroku postgres
  • New relic APM, I'm just using it for ping my app every 15 minuts

The logs show me that my dyno is using too much memory, even if I restart my dyno :

2022-04-12T20:37:30.654162+00:00 heroku[web.1]: Process running mem=598M(116.0%)
2022-04-12T20:37:30.659620+00:00 heroku[web.1]: Error R14 (Memory quota exceeded)

So I tried to investigate and used jconsole with :

heroku java:jconsole

with the current result :

enter image description here

As you can see, my heap memory usage is not so big : only between 100 and 200 MB. Heroku is complaining about 598Mb of memory used.

My database is also pretty lightweight : enter image description here

What could be the cause ?

javaspring-bootheroku


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