Arduino Due uploading error using Eclipse plugin "avrdude: stk500_recv(): programmer is not responding"
avrdude: stk500_recv(): programmer is not responding
  avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x03


There's your clue. 
1) programmer is not responding - This usually means the device isn't connected, or powered, or reachable by the IDE, make sure you have eclipse configured correctly for your device, and it's location.

2) not in sync - This is a redundant, or overlapping error, of course it's not going to sync if it can't connect.