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From Yehuda Katz <>
Subject Re: [users@httpd] Does Apache need to delay startup until system time set?
Date Thu, 20 Apr 2017 21:07:55 GMT
There are some parts of the HTTP conversation which could be affected by
having the wrong time, but HTTPD itself doesn't care.
For example, if you are using cookies, caching, those could be affected by
the time change (even more specifically, for PHP sessions, when the clock
changes, the PHP session cleanup handler might think a session is very old
and remove it).
If you want to wait for the time to be synchronized, I think you can change
the systemd unit to require chrony-wait.service (

- Y

On Thu, Apr 20, 2017 at 4:57 PM, Robert Moskowitz <>

> This is for Centos7 on an armv7 SOC with no clock battery.
> On startup, Centos runs Chronyd which eventually sets the system clock.
> This can happen really fast, or not depending.  I have learned that it is
> NOT a good thing for postfix to start when the system time is earlier than
> the build date of postfix.  There is a way for me to delay postfix start
> until the time is set.
> Does Apache also have this concern not to start until the time is 'fixed'?
> thanks
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