Even though the bug description does not directly mentions the "%SNMP-3-INPUT_QFULL_ERR" message, but the issue is related to the error message. So, in many cases it is been observed that after upgrading to a fixed version, or implemented the workaround the "%SNMP-3-INPUT_QFULL_ERR” disappeared.
3. Another bug that seems to be related to this message is CSCtn19200.
4. To be more certain of what exactly is the problem, we would have to
collect a 'show stacks <snmp-engine pid>' output, but based on the evidence I believe the best course of action is to either upgrade to the IOS versions that contains the fix for the bugs I mentioned or implement the workaround.