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RT-AC68U+MerlinWRT Httpd crash and CPU1 100%

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autourdesam

Occasional Visitor
I discover recently MerlinWRT on RT-AC68U and RT-AC66U with very great impression . I used usually DDWrt on cisco/linksys routers but the need of statistic in Traffic Analyzer make me change :)

I have the following issue with a white RT-AC68U ( H/W Ver A1 , Manufactured 2015, original firmware 3.0.0.4.378_8258) with Merlin 380.57_0 .
For unknown reason this is the second time http interface crash (10days between the crashs) , then I restart the httpd service with CLI service restart_httpd and then CPU1 was at 100%
Top command show CPU around 1 or 3 % only ...

The only way to get it back in web interface to a 1 or 2 % state was to restart the router with CLI command reboot.

Nothing connected on USB and only Wireless 5G is active .

I had a smilar issue on a remote second RT-AC68U ( black one didn't remember the info on it and I can't see sticker on it because it is a remote router) . I detected in web interface CPU1 at 100% can't navigate anymore in web interface so I initiate a remote cli reboot command but the router came back online near 1 hour after the command ( NAgios monitoring of the router with ping command confirm the online return... possible someone on site turn it off and then turn it on ... don't know)
It is with the same MerlinWRT firmware , no USB hardware , but both 2.4G and 5G wireless are on .

Any idea of what the problem is , and how to solve it ?
thanks a lot
Sam
 

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Any idea of what the problem is , and how to solve it ?
Did you do a factory reset AFTER the firmware update/change and reconfigured the router manually?
 
I discover recently MerlinWRT on RT-AC68U and RT-AC66U with very great impression . I used usually DDWrt on cisco/linksys routers but the need of statistic in Traffic Analyzer make me change :)

I have the following issue with a white RT-AC68U ( H/W Ver A1 , Manufactured 2015, original firmware 3.0.0.4.378_8258) with Merlin 380.57_0 .
For unknown reason this is the second time http interface crash (10days between the crashs) , then I restart the httpd service with CLI service restart_httpd and then CPU1 was at 100%
Top command show CPU around 1 or 3 % only ...

The only way to get it back in web interface to a 1 or 2 % state was to restart the router with CLI command reboot.

Nothing connected on USB and only Wireless 5G is active .

I had a smilar issue on a remote second RT-AC68U ( black one didn't remember the info on it and I can't see sticker on it because it is a remote router) . I detected in web interface CPU1 at 100% can't navigate anymore in web interface so I initiate a remote cli reboot command but the router came back online near 1 hour after the command ( NAgios monitoring of the router with ping command confirm the online return... possible someone on site turn it off and then turn it on ... don't know)
It is with the same MerlinWRT firmware , no USB hardware , but both 2.4G and 5G wireless are on .

Any idea of what the problem is , and how to solve it ?
thanks a lot
Sam
 
I have the same problem on a third RT-AC68U with this time an H/W A2 ... So I think it is a real firmware issue... don't you think ? This time it happens on CPU1 instead of CPU0.
Here is the result of top command in the cli . Please note the abnormal load average :
ASUSWRT-Merlin RT-AC68U_3.0.0.4 Thu Dec 24 18:54:10 UTC 2015
admin@RTAC68U:/tmp/home/root# top
Mem: 68624K used, 187092K free, 0K shrd, 660K buff, 8896K cached
CPU: 0.0% usr 0.0% sys 0.0% nic 50.0% idle 50.0% io 0.0% irq 0.0% sirq
Load average: 4.09 4.04 4.05 1/91 31208
PID PPID USER STAT VSZ %VSZ CPU %CPU COMMAND
440 1 admin S 6996 2.7 0 0.0 httpd
441 1 admin S 6984 2.7 0 0.0 httpd -s -p 8443
1 0 admin S 6248 2.4 0 0.0 /sbin/preinit
446 1 admin S 6220 2.4 1 0.0 watchdog
775 1 admin S 6200 2.4 1 0.0 bwdpi_wred_alive
422 1 admin S 6200 2.4 1 0.0 /sbin/wanduck
685 1 admin S 6200 2.4 1 0.0 ntp
810 446 admin S 6200 2.4 1 0.0 hour_monitor
725 1 admin S 6200 2.4 0 0.0 disk_monitor
447 1 admin S 6200 2.4 1 0.0 sw_devled
454 446 admin S 6200 2.4 0 0.0 ots
474 1 admin S 6200 2.4 1 0.0 bwdpi_check
18275 1 admin S 6200 2.4 0 0.0 usbled
428 1 admin S 6200 2.4 1 0.0 wpsaide
342 1 admin S 6192 2.4 1 0.0 console
500 1 admin S 5524 2.1 1 0.0 /usr/sbin/smbd -D -s /etc/smb.conf
498 1 admin S 5448 2.1 0 0.0 nmbd -D -s /etc/smb.conf
499 498 admin S 5304 2.0 1 0.0 nmbd -D -s /etc/smb.conf
8918 8917 admin D 5228 2.0 0 0.0 bwdpi_sqlite -e -s NULL
2313 2309 admin S 3768 1.4 1 0.0 data_colld -i 1800 -p 43200 -b -w
2308 1 admin S 3768 1.4 0 0.0 data_colld -i 1800 -p 43200 -b -w
2318 2309 admin S 3768 1.4 0 0.0 data_colld -i 1800 -p 43200 -b -w
2311 2309 admin S 3768 1.4 0 0.0 data_colld -i 1800 -p 43200 -b -w
2309 2308 admin S 3768 1.4 0 0.0 data_colld -i 1800 -p 43200 -b -w
2312 2309 admin S 3768 1.4 0 0.0 data_colld -i 1800 -p 43200 -b -w
2310 2309 admin S 3768 1.4 1 0.0 data_colld -i 1800 -p 43200 -b -w
18274 1 admin S 2192 0.8 1 0.0 u2ec
18282 18274 admin S 2192 0.8 0 0.0 u2ec
18283 18282 admin S 2192 0.8 1 0.0 u2ec
439 1 admin S 2084 0.8 0 0.0 avahi-daemon: running [RT-AC68U-87
737 736 admin S 1844 0.7 0 0.0 wred -B
736 734 admin S 1844 0.7 1 0.0 wred -B
734 1 admin S 1844 0.7 0 0.0 wred -B
745 736 admin S 1844 0.7 0 0.0 wred -B
741 736 admin S 1844 0.7 0 0.0 wred -B
740 736 admin S 1844 0.7 1 0.0 wred -B
744 736 admin S 1844 0.7 0 0.0 wred -B
738 736 admin S 1844 0.7 1 0.0 wred -B
739 736 admin S 1844 0.7 0 0.0 wred -B
743 736 admin S 1844 0.7 0 0.0 wred -B
742 736 admin S 1844 0.7 1 0.0 wred -B
18260 1 admin S 1576 0.6 0 0.0 nas
18273 1 admin S 1464 0.5 1 0.0 networkmap
23470 1 admin S 1396 0.5 1 0.0 /sbin/udhcpc -i eth0 -p /var/run/u
443 1 admin S 1392 0.5 0 0.0 crond
31205 31203 admin S 1392 0.5 0 0.0 -sh
31208 31205 admin R 1388 0.5 1 0.0 top
344 342 admin S 1388 0.5 1 0.0 /bin/sh
16289 446 admin D 1388 0.5 1 0.0 cp /tmp/syslog.log /tmp/syslog.log
354 1 admin S 1384 0.5 1 0.0 /sbin/klogd -c 5
8917 810 admin S 1384 0.5 1 0.0 sh -c bwdpi_sqlite -e -s NULL
352 1 admin S 1380 0.5 1 0.0 /sbin/syslogd -m 0 -S -O /tmp/sysl
451 1 admin S 1372 0.5 0 0.0 rstats
18262 1 admin S 1360 0.5 0 0.0 /usr/sbin/acsd
434 1 nobody S 1272 0.5 0 0.0 dnsmasq --log-async
462 1 admin S 1188 0.4 1 0.0 lld2d br0
18258 1 admin S 1172 0.4 0 0.0 /bin/eapd
444 1 admin S 1144 0.4 1 0.0 /usr/sbin/infosvr br0

Please note that same issue with radio wifi activated or not ... I tried both . It happens occasionaly for unknown reason ...

Any help and/or explanation
Thanks a lot
 
Last edited:

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