I am developing an app for android which downloads points of interest from a server using JSON strings. Everything was working fine but since I have started testing on 4.2.1
Check out this bug report. http://code.google.com/p/google-gson/issues/detail?id=440
Comment #12:
I believe it was in API 17 that the internals of WeakReference and SoftReference changed to be self-referent, which would trigger this. Are you using Gson to serialize a WeakReference or SoftReference? If you are, you should write your own TypeAdapter for those types.
Something in your code is causing a circular reference and since it works up until 4.2.1 (API 17), it is most likely one of the Java classes. It still could be your code, but I'm highly doubtful.