DD-WRT :: View topic - [dnsmasq] : maybe died, we need to re-exec it issue

[dnsmasq] : maybe died, we need to re-exec it issue

DD-WRT Forum Index -> Broadcom SoC based Hardware

Goto page 1, 2, 3, 4, 5, 6, 7 Next

View previous topic :: View next topic

Author

Message

r2digital
DD-WRT Novice

Joined: 24 Jul 2012
Posts: 47

Posted: Mon Oct 02, 2023 21:12 Post subject: [dnsmasq] : maybe died, we need to re-exec it issue

I have a asus ac5300 with the latest ddwrt firmware and i constantly get "[dnsmasq] : maybe died, we need to re-exec it" this happens serveral times daily which is super annyoing because it causes internet to drop out until dnsmasq starts up again after crashing. Obviously disabling it is a quick fix but are there any work arounds/settings to keep it enabled? Not sure if its related specifically to this router or what. These are my current settings

dns.png

Description:

Filesize:

55.67 KB

Viewed:

12267 Time(s)

Sponsor

Per Yngve Berg
DD-WRT Guru

Joined: 13 Aug 2013
Posts: 6870
Location: Romerike, Norway

Posted: Tue Oct 03, 2023 7:16 Post subject:
What build are you running?

r2digital
DD-WRT Novice

Joined: 24 Jul 2012
Posts: 47

Posted: Tue Oct 03, 2023 11:03 Post subject:
im on the latest available build Firmware: DD-WRT v3.0-r53544 std (09/28/23)

Alozaros
DD-WRT Guru

Joined: 16 Nov 2015
Posts: 6447
Location: UK, London, just across the river..

Posted: Tue Oct 03, 2023 11:21 Post subject:

there must be something wrong with your config...
why do you need cache min time to live 3600..?

-do you have any other DNS servers specified...may be in those x3 boxes..on the basic setup page..
-any other settings...ignore WAN dns may be..
-SFE enabled ?
-wrong DHCP names that contain intervals or not allowed charters
more details..provided.. picture gets better and better...

if something goes too far and DNSmasq crashes it could be a due to an external factor or misconfiguration...mine on all my routers is rock solid...and more people will share the same ...i guess

all servers will query all of the servers at the same time and will come with the fastest answer...but, those with filtering capabilities with hang the filtered answers and the one without restriction will provide the answer, even if its should be filtered...so not a good idea to use servers with filters and like 8.8.8.8 without...

personally i use 9.9.9.9, as none of your servers above meets my needs...
_________________
Atheros
TP-Link WR740Nv1 ---DD-WRT 55630 WAP
TP-Link WR1043NDv2 -DD-WRT 55723 Gateway/DoT,Forced DNS,Ad-Block,Firewall,x4VLAN,VPN
TP-Link WR1043NDv2 -Gargoyle OS 1.15.x AP,DNS,QoS,Quotas
Qualcomm-Atheros
Netgear XR500 --DD-WRT 55779 Gateway/DoH,Forced DNS,AP Isolation,4VLAN,Ad-Block,Firewall,Vanilla
Netgear R7800 --DD-WRT 55819 Gateway/DoT,AD-Block,Forced DNS,AP&Net Isolation,x3VLAN,Firewall,Vanilla
Netgear R9000 --DD-WRT 55779 Gateway/DoT,AD-Block,AP Isolation,Firewall,Forced DNS,x2VLAN,Vanilla
Broadcom
Netgear R7000 --DD-WRT 55460 Gateway/SmartDNS/DoH,AD-Block,Firewall,Forced DNS,x3VLAN,VPN
NOT USING 5Ghz ANYWHERE
------------------------------------------------------
Stubby DNS over TLS I DNSCrypt v2 by mac913

r2digital
DD-WRT Novice

Joined: 24 Jul 2012
Posts: 47

Posted: Tue Oct 03, 2023 12:12 Post subject:

Even with default settings of 0.0.0.0 for dns servers on the basic setup page and with out any extra commands in the services tab it still cause dnsmasq to crash. Currently i have the same dns servers setup in the basic info section as i do under the services tab. I just added those commands recently as a way to try and remedy the problem. Believe it or not they have helped a tiny bit but not enough to call it fixed. At first i thought it was a hardware problem so i flashed the router back to stock and after that was working great so then i flashed to freshtomato which also uses dnsmasq, ran that for 2 weeks with out any dnsmasq issues that had no issues. i was able to then flash back to ddwrt and identify the dnsmasq issue.I will be home later today and post addition pics of my configuration but i know for sure that i use CTF instesd of sfe

ho1Aetoo
DD-WRT Guru

Joined: 19 Feb 2019
Posts: 3005
Location: Germany

Posted: Tue Oct 03, 2023 12:23 Post subject:

I also have a router on which regularly dnsmasq dies, the router is configured the same as 5 other routers...

On the other routers the problem does not occur.
_________________
Quickstart guides:
use Pi-Hole as simple DNS-Server with DD-WRT
VLAN configuration via GUI - 1 CPU port
VLAN configuration via GUI - 2 CPU ports (R7800, EA8500 etc)

Routers
Marvell OCTEON TX2 - QHora-322 - OpenWrt 23.05.3 - Gateway
Qualcomm IPQ8065 - R7800 - DD-WRT - WAP

egc
DD-WRT Guru

Joined: 18 Mar 2014
Posts: 12917
Location: Netherlands

Posted: Tue Oct 03, 2023 13:39 Post subject:

You can remove min-cache-ttl as it already defaults to one hour
I would also remove cache-size=1000, it is rather a lot (default is 150) and can impact performance

Add to the additional options:

Quote:

log-queries=extra
log-debug
log-facility=/tmp/dnsmasq.log

This will log DNSMasq to /tmp/dnsmasq.log and adds extra log information.

Reboot the router and when it happens again send output of:

Quote:

cat /tmp/dnsmasq.log
cat /tmp/dnsmasq.conf
cat /var/log/messages

Also we need information about general setup and network setup.
_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087

itwontbewe
DD-WRT User

Joined: 29 Sep 2020
Posts: 260
Location: United States

Posted: Tue Oct 03, 2023 14:24 Post subject:
could the cache setting in there twice with different values cause issues?

egc
DD-WRT Guru

Joined: 18 Mar 2014
Posts: 12917
Location: Netherlands

Posted: Tue Oct 03, 2023 14:40 Post subject:

itwontbewe wrote:

could the cache setting in there twice with different values cause issues?

Good question but I do not think so.
_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087

dale_gribble39
DD-WRT Guru

Joined: 11 Jun 2022
Posts: 1958

Posted: Tue Oct 03, 2023 17:16 Post subject:

Output of syslog will tell us why it's dying. Redundant entries will confuse dnsmasq.
_________________
"The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep." - Robert Frost

"I am one of the noticeable ones - notice me" - Dale Frances McKenzie Bozzio

<fact>code knows no gender</fact>

This is me, knowing I've ruffled your feathers, and not giving a ****
Some people are still hard-headed.
--------------------------------------
Mac Pro (Mid 2012) - Two 2.4GHz 6-Core Intel Xeon E5645 processors 64GB 1333MHz DDR3 ECC SDRAM OpenSUSE Leap 15.5

r2digital
DD-WRT Novice

Joined: 24 Jul 2012
Posts: 47

Posted: Tue Oct 03, 2023 19:25 Post subject:

i adjusted the settings to account for logging dnsmasq and also am posting my basic setup page.

Oct 3 18:26:44 DD-WRT daemon.info process_monitor[9245]: Local timer delta is 1
Oct 3 19:08:00 DD-WRT user.info : [dnsmasq] : maybe died, we need to re-exec it
Oct 3 19:08:01 DD-WRT user.info : [dnsmasq] : successfully started
Oct 3 19:12:00 DD-WRT user.info : [dnsmasq] : maybe died, we need to re-exec it
Oct 3 19:12:00 DD-WRT user.info : [dnsmasq] : successfully started
Oct 3 19:22:00 DD-WRT user.info : [dnsmasq] : maybe died, we need to re-exec it
Oct 3 19:22:01 DD-WRT user.info : [dnsmasq] : successfully started
Oct 3 19:26:44 DD-WRT daemon.debug ntpclient[18303]: Connecting to pool.ntp.org [5.161.186.39] ...
Oct 3 19:26:44 DD-WRT daemon.info ntpclient[18303]: Time set from pool.ntp.org [5.161.186.39].
Oct 3 19:26:44 DD-WRT daemon.info process_monitor[9245]: Cyclic NTP Update success (servers pool.ntp.org)
Oct 3 19:26:44 DD-WRT daemon.info process_monitor[9245]: Local timer delta is 0
Oct 3 19:37:40 DD-WRT daemon.info httpd[8975]: [httpd] : Authentication fail

basic setup.png

Description:

Filesize:

119.53 KB

Viewed:

12113 Time(s)

Alozaros
DD-WRT Guru

Joined: 16 Nov 2015
Posts: 6447
Location: UK, London, just across the river..

Posted: Fri Oct 06, 2023 7:11 Post subject:

looking at your picture..

-enable ignore WAN DNS
-unless you need it disable SFE (shortcut forwarding engine)
-disable Forced DNS redirection DOT
-in NTP time section remove pool.ntp.org as this field is meant to use IP's instead..
Google NTP time server is 216.239.35.4 ass this IP if so...

For DNS and some other router services, resolving NTP time is vital...if you add an IP, it will be faster and wont be dependent on DNS resolving...so, egg comes first...than the chicken...
Cool

_________________
Atheros
TP-Link WR740Nv1 ---DD-WRT 55630 WAP
TP-Link WR1043NDv2 -DD-WRT 55723 Gateway/DoT,Forced DNS,Ad-Block,Firewall,x4VLAN,VPN
TP-Link WR1043NDv2 -Gargoyle OS 1.15.x AP,DNS,QoS,Quotas
Qualcomm-Atheros
Netgear XR500 --DD-WRT 55779 Gateway/DoH,Forced DNS,AP Isolation,4VLAN,Ad-Block,Firewall,Vanilla
Netgear R7800 --DD-WRT 55819 Gateway/DoT,AD-Block,Forced DNS,AP&Net Isolation,x3VLAN,Firewall,Vanilla
Netgear R9000 --DD-WRT 55779 Gateway/DoT,AD-Block,AP Isolation,Firewall,Forced DNS,x2VLAN,Vanilla
Broadcom
Netgear R7000 --DD-WRT 55460 Gateway/SmartDNS/DoH,AD-Block,Firewall,Forced DNS,x3VLAN,VPN
NOT USING 5Ghz ANYWHERE
------------------------------------------------------
Stubby DNS over TLS I DNSCrypt v2 by mac913

Last edited by Alozaros on Fri Oct 06, 2023 14:00; edited 2 times in total

ho1Aetoo
DD-WRT Guru

Joined: 19 Feb 2019
Posts: 3005
Location: Germany

Posted: Fri Oct 06, 2023 10:59 Post subject:

dnsmasq[13138]: exiting on receipt of SIGTERM

dnsmasq[27672]: exiting on receipt of SIGTERM

maybe died, we need to re-exec it

So in my log it looks like dnsmasq is not dying at all but restarting incorrectly.

Is still very strange because the problem occurs only on one router
_________________
Quickstart guides:
use Pi-Hole as simple DNS-Server with DD-WRT
VLAN configuration via GUI - 1 CPU port
VLAN configuration via GUI - 2 CPU ports (R7800, EA8500 etc)

Routers
Marvell OCTEON TX2 - QHora-322 - OpenWrt 23.05.3 - Gateway
Qualcomm IPQ8065 - R7800 - DD-WRT - WAP

mwchang
DD-WRT Guru

Joined: 26 Mar 2013
Posts: 1858
Location: Hung Hom, Hong Kong

Posted: Sat Oct 07, 2023 13:00 Post subject:

ho1Aetoo wrote:

maybe died, we need to re-exec it

So in my log it looks like dnsmasq is not dying at all but restarting incorrectly.
Is still very strange because the problem occurs only on one router

As a reference, try clearing "Server IP/Name" field, hit Save and reboot! If these log entries still appeared, then something else was causing the problem.

You can test connection to ntp.pool.org using Windows:

Code:

C:\> w32tm /stripchart /computer:pool.ntp.org /dataonly
Tracking pool.ntp.org [162.159.200.1:123].
The current time is 10/7/2023 9:06:54 PM.
21:06:54, +22.0524315s
21:06:56, +22.0524448s
^C

_________________
Router: Asus RT-N18U (rev. A1)

Drink, Blink, Stretch! Live long and prosper! May the Force and farces be with you!

Facebook: https://www.facebook.com/changmanwai
Website: https://sites.google.com/site/changmw
SETI@Home profile: http://setiathome.berkeley.edu/view_profile.php?userid=211832
GitHub: https://github.com/changmw/changmw

ho1Aetoo
DD-WRT Guru

Joined: 19 Feb 2019
Posts: 3005
Location: Germany

Posted: Sat Oct 07, 2023 13:17 Post subject:

this has nothing to do with NTP at all
first of all i use the settings on 5 identical routers and only the one router has problems
secondly the NTP servers are polled every 60min as you can see in the logs.

Code:

15:01:21 dnsmasq[13138]: 91 192.168.1.4/42765 query[A] 2.pool.ntp.org from 192.168.1.4
16:01:32 dnsmasq[13138]: 93 192.168.1.4/36187 query[A] 2.pool.ntp.org from 192.168.1.4
17:01:42 dnsmasq[13138]: 95 192.168.1.4/36525 query[A] 2.pool.ntp.org from 192.168.1.4
18:01:52 dnsmasq[13138]: 97 192.168.1.4/45367 query[A] 2.pool.ntp.org from 192.168.1.4
19:02:02 dnsmasq[13138]: 99 192.168.1.4/36940 query[A] 2.pool.ntp.org from 192.168.1.4
19:46:00 dnsmasq[13138]: exiting on receipt of SIGTERM

but dnsmasq is restarted in between and not when the NTP server is contacted.

We better practice reading the logs again
_________________
Quickstart guides:
use Pi-Hole as simple DNS-Server with DD-WRT
VLAN configuration via GUI - 1 CPU port
VLAN configuration via GUI - 2 CPU ports (R7800, EA8500 etc)

Routers
Marvell OCTEON TX2 - QHora-322 - OpenWrt 23.05.3 - Gateway
Qualcomm IPQ8065 - R7800 - DD-WRT - WAP

Goto page 1, 2, 3, 4, 5, 6, 7 Next

Display posts from previous:

Page 1 of 7

DD-WRT Forum Index -> Broadcom SoC based Hardware

All times are GMT

Navigation

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum

Log in

[dnsmasq] : maybe died, we need to re-exec it issue

Quick Links

Log in