Java 9 High Performance

java.lang.OutOfMemoryError: Metaspace

One of the regions of the JVM memory is the Metaspace region. If it gets filled up, JVM throws this type of exception. Since this is the replacement of the permanent generation region, the Metaspace region now stores the information of permanent generation. It is used to store things like the declarations, including name and fields of the class, methods with their bytecode, object arrays, constant pool information and JIT compiler optimization of the loaded classes.

Hence, this type of error is thrown by JVM for having a large number of big classes. The following example uses javassist package from the link: http://jboss-javassist.github.io/javassist/ which enables Java bytecode manipulation. This library ...