What is errorĪn error is thrown by the Java Virtual Machine when it finds that not enough memory is left for storing the object in the heap space, and as a result, the JVM throws an error that it is unable to allocate the object because no more space is left for storing it. Thus when a JVM is launched, the size of the Heap space and permgen is set. The JVM architecture is composed of essential tools and libraries, and the space area is divided into two different parts, i.e., Heap space and Permgen (also known as Permanent Generation).

It is the Java restriction that a Java application can only use a limited amount of memory.

In Java programming language, a user creates an object, and that object gets stored in the heap area of the Java.

So, in this section, we are going to discuss the error, about heap space, and how to fix the error.

The name of the error itself conveys that it is an out-of-memory error where the JVM throws such error when it cannot allocate an object in the heap memory.

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