Rare fall of the main map

Rarely the main map is falling, still could not figure out why the last time I picked up the log before you restart it and found:

assert failed: "== task_size TASK_GLOBAL_DATA_SIZE" in file netmsg.cpp: 252

Is that the reason for the decline? Was the log map 01.
What is the reason? Anyone know the meaning?

Thanks.

i have this problem...... need open world.log and see.

my bug quest 3*** ... i dont remember... need see log and task data