Java.lang.outofmemory exception

Question

Hello,
I have an application, that writes several thousands of records into a file and transfers the same to the server. I am encountering an exception "java.lang.OutOfMemoryError" exception.
I had checked this forum earlier and found a solution that recommended an increase in the memory slot allocated to the JVM. Despite, an increase in this slot from 256MB (eclipse's default) to 1024 MB, my problem still persists. I had updated the eclipse.ini field from "-vmargs -Xms40m -Xmx256m" to "-vmargs -Xms40m -Xmx1024m". Is there anything else that I need to do, to take care of this problem? I am using green threads in the application, does this have anything to do with the above mentioned exception?
Thanks!

Answer 1

I am using
green threads in the application, does this have
anything to do with the above mentioned exception?It wouldn't be hard to find out. Create a new java class where the main method does the same work; writing several thousands of records into a file and transferring it to the server.
Maybe it's all the other variables you have in your application that are cutting into the memory. But can you really reduce them?
Are you loading all thousands of records to memory (I'd imagine in a hashmap or a list) all at once? Like said, do this in smaller chunks, store the records in memory just one at a time and see if that works. It will be slow but it won't run out of memory. Then increase your "batch size" until you find the optimum.