AH00297: SIGUSR1 received. Doing graceful restart

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AH00297: SIGUSR1 received. Doing graceful restart

AlanCC

2:37 pm on Jul 3, 2023 (gmt 0)

Hi,

I check Apache error log of our website and find many lines like below:

[Sun Jun 25 01:11:19.837731 2023] [mpm_worker:notice] [pid 7774:tid 46959971554368] AH00297: SIGUSR1 received. Doing graceful restart
[Sun Jun 25 01:16:47.206726 2023] [mpm_worker:notice] [pid 8404:tid 47805028799552] AH00297: SIGUSR1 received. Doing graceful restart
[Sun Jun 25 01:17:36.036497 2023] [mpm_worker:notice] [pid 8404:tid 47805028799552] AH00297: SIGUSR1 received. Doing graceful restart
[Sun Jun 25 01:19:36.201817 2023] [mpm_worker:notice] [pid 8404:tid 47805028799552] AH00297: SIGUSR1 received. Doing graceful restart

I ask the support of the server, and they said maybe due to the high load of the server, the service is auto-restarted.

However, :

1. At that time spot, the server is not open to public.
2. It is impossible that the service restarted on Jun 25, 1:11 and then after 5 min, it restarted due to heave load.

So I just wonder what is the problem with the server?

not2easy

4:36 pm on Jul 3, 2023 (gmt 0)

But you reset the server settings after that June 25 date ( see [webmasterworld.com...] ) so I would be more concerned if you start seeing more such errors after your reset. You mentioned manually restarting the server in that thread so it is possible it is not related to the high load of the server.

AlanCC

3:01 am on Jul 4, 2023 (gmt 0)

Hi, not2easy +

Sorry for the confusion. This [webmasterworld.com...] ticket just mention another server, not this one.

And there are also many similar lines on other days(actually every day), not just June 25. And I can confirm this is not a manual restart.

For example:

[Sun Jul 02 05:03:11.784938 2023] [mpm_worker:notice] [pid 16483:tid 47435956425792] AH00297: SIGUSR1 received. Doing graceful restart
[Sun Jul 02 05:11:57.021423 2023] [mpm_worker:notice] [pid 16483:tid 47435956425792] AH00297: SIGUSR1 received. Doing graceful restart
[Sun Jul 02 05:12:47.409570 2023] [mpm_worker:notice] [pid 16483:tid 47435956425792] AH00297: SIGUSR1 received. Doing graceful restart
[Sun Jul 02 06:03:55.658999 2023] [mpm_worker:notice] [pid 16483:tid 47435956425792] AH00297: SIGUSR1 received. Doing graceful restart
[Sun Jul 02 06:37:50.454334 2023] [mpm_worker:notice] [pid 16483:tid 47435956425792] AH00297: SIGUSR1 received. Doing graceful restart
[Sun Jul 02 06:38:19.842410 2023] [mpm_worker:notice] [pid 16483:tid 47435956425792] AH00297: SIGUSR1 received. Doing graceful restart

Some restart is very close in time, only about 1min. So I doubt it is a heavy load

not2easy

4:22 am on Jul 4, 2023 (gmt 0)

In that case, the confusion is mine, not yours.