[CentOS] Any problem of auto updating using yum?

Hello, all.

My systems are centos 4.x or 5.x(i386 and x86_64) and various services(apache, mysql, java, sendmail... etc..).

and I would like to set auto update using yum.

But some staffs didn't agree my auto update plan,

because some services can be effected by auto update.

There were no side effects just yum updating until now,

and it seems impossible for me to check all packages whether side effects or not before updates.

How about your opinions about this?

Anyone who have experienced troubles by auto update?

Is there any good way to solve this problem?

Thanks in advance.

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