[FIXED] Incompatible initial and maximum heap sizes specified

Issue

I got this Error when I run a java class which has an NLP library ....

Error occurred during initialization of VM
Incompatible initial and maximum heap sizes specified

any idea how i can solve this error :)

Solution

You should note that in case of setting initial heap size bigger than maximum one, application will produce such error

-Xms means initial heap size
-Xmx means maximum heap size allowed for particular JVM

• java -Xms128m MyClass
  • WRONG, because default maximum heap size could be lower than 128m
• java -Xms128m -Xmx128m MyClass
  • BETTER, because initial size is equal or higher than maximum

Read more here http://javahowto.blogspot.com/2006/06/6-common-errors-in-setting-java-heap.html

And useful is too, to understand those two arguments, read more here if you're interested:

Speed tradeoff of Java's -Xms and -Xmx options
What are the Xms and Xmx parameters when starting JVMs?

Answered By - Marek Sebera