I got a error , it's show *** Level 2 watchdog timeout reset *** and reboot a few minutes.I didn't find any information for this! Does any one can tell me what's wrong with it?

Here's the 3825 log sesstionplease help me for find problem!after crash , i have upgrade the rommon because the old rommon cannot read flash in rommon modebut when i upgrade the rommon to the newest versionit was also can not read flashand i upgrade ...