Hi Jagdish,
What is the size of you payload?, have you tried to save it in local and check the size?. I have done test with 1Mb or 2Mb without any issues, even in XI 3.0, obviously this depends of your PI memory, but you can check (or your basis team) the PI traces for any memory issue. Have you checked the java process in your laptop?, may be is your personal computer memory or you are using a jvm not appropriated for your PI version.
Regards.