When you restart apache2, apachecaughtSIGTERM and shuttingdown. how can this problem be solved?

When you restart apache2, apachecaughtSIGTERM and shuttingdownerror. the log contains [ThuFeb2309: 35: 422012] [notice] Apache/2.2.14 (Ubuntu) PHP/5.3.2-1ubuntu4. 14. when withSuh restarts apache2, apache caught SIGTERM and shutting down
In error. log
[Thu Feb 23 09:35:42 2012] [notice] Apache/2.2.14 (Ubuntu) PHP/5.3.2-1ubuntu4. 14 with Suhosin-Patch configured -- resuming normal ope rations
[Thu Feb 23 09:35:51 2012] [notice] caught SIGTERM, shutting down
[Thu Feb 23 09:35:52 2012] [notice] Apache/2.2.14 (Ubuntu) PHP/5.3.2-1ubuntu4. 14 with Suhosin-Patch configured -- resuming normal ope rations
[Thu Feb 23 09:35:57 2012] [notice] caught SIGTERM, shutting down
[Thu Feb 23 09:35:58 2012] [notice] Apache/2.2.14 (Ubuntu) PHP/5.3.2-1ubuntu4. 14 with Suhosin-Patch configured -- resuming normal ope rations
[Thu Feb 23 09:41:05 2012] [notice] caught SIGTERM, shutting down
[Thu Feb 23 09:41:06 2012] [notice] Apache/2.2.14 (Ubuntu) PHP/5.3.2-1ubuntu4. 14 with Suhosin-Patch configured -- resuming normal ope rations

This error occurs when apache is restarted. apache can be used normally.
But I don't understand why this error occurs. google hasn't found the answer for a long time ..
Ubuntu 10.04lts

------ Solution --------------------
Notice is not an error.
------ Solution --------------------
This is not an error. this is a normal log.
Since it is a restart, there are two steps:
Caught SIGTERM, shutting down
Apache is telling you that it has received SIGTERM and is shutting down
The next line is the apache startup log...