The main cause for the java.lang.OutOfMemoryError: Metaspace is: either too many classes or too big classes being loaded to the Metaspace. If you want to recreate the problem use this code snippet: public class Metaspace { static javassist.ClassPool cp = javassist.ClassPool.getDefault(); public static void main(String[] args) throws Exception { for (int i = 0; ; … Read more
I assume you can create the issue with same request (Set of requests) over a period of time. It is a good thing that you have MaxMetaspaceSize defined, otherwise app will use native memory till it runs out to grow. But i will start with following steps: Check if your number of classes that are … Read more
The main difference from a user perspective – which I think the previous answer does not stress enough – is that Metaspace by default auto increases its size (up to what the underlying OS provides), while PermGen always has a fixed maximum size. You can set a fixed maximum for Metaspace with JVM parameters, but … Read more