java.lang.OutOfMemoryError: Java heap space

Question

I am getting the following error on execution of a multi-threading program

java.lang.OutOfMemoryError: Java heap space

The above error occu

Answer 1

1.- Yes, but it pretty much refers to the whole memory used by your program.

2.- Yes see Java VM options

-Xms        set initial Java heap size
-Xmx        set maximum Java heap size

Ie

java -Xmx2g assign 2 gigabytes of ram as maximum to your app

But you should see if you don't have a memory leak first.

3.- It depends on the program. Try spot memory leaks. This question would be to hard to answer. Lately you can profile using JConsole to try to find out where your memory is going to