WebUI unresponsive and 100% CPU

[makkie2002]

Hi,

I have had this issue several times already with my AC3200 on Merlin 384.5.
First, I am not able to log into the webui at port 80, but I can login at port 8443. What is see then is that CPU2 has 100% utilisation. If I SSH into the router and do a 'top' I see this (load average of >5 and 100% io on CPU2):

Mem: 118996K used, 136440K free, 2040K shrd, 760K buff, 9680K cached
CPU0:  0.0% usr  0.0% sys  0.0% nic  100% idle  0.0% io  0.0% irq  0.0% sirq
CPU1:  0.0% usr  0.0% sys  0.0% nic  0.0% idle  100% io  0.0% irq  0.0% sirq
Load average: 5.08 5.09 5.07 2/113 10963
  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
  308     1 admin    S     2224  0.8   1  0.0 avahi-daemon: running [RT-AC3200-5CC0.local]
  262     1 admin    R     2048  0.8   1  0.0 protect_srv
10599 10529 admin    R     1424  0.5   1  0.0 top
  338     1 admin    S     5900  2.3   1  0.0 networkmap --bootwait
  315     1 admin    S     5576  2.1   0  0.0 httpds -s -i br0 -p 8443
  316     1 admin    S     5560  2.1   0  0.0 httpd -i br0
  289     1 admin    D     5312  2.0   0  0.0 nt_center
  363   342 admin    S     5312  2.0   0  0.0 mastiff
  292   289 admin    S     5312  2.0   1  0.0 nt_center
  342     1 admin    S     5312  2.0   1  0.0 mastiff
  293   292 admin    S     5312  2.0   1  0.0 nt_center
  364   363 admin    S     5312  2.0   1  0.0 mastiff

The only thing that helps is to reboot the router.
I have nothing plugged in on the USB port.
Anybody else experiencing this issue?

 

[kfp]

Can you try enabling only “HTTPS” (turn off HTTP to avoid two instances of httpd running) for web UI?

 

[john9527]

Not sure, but it looks a bit odd that you have multiple instances of 'mastiff' (an Asus closed source component) running on CPU1. Merlin put in a change in the 384.6 alpha such that if you force disable mastiff, it won't get restarted by the watchdog. You may want to give it a try to see if it helps.

 

[bsdsource]

Can you try enabling only “HTTPS” (turn off HTTP to avoid two instances of httpd running) for web UI?

I've had problems setting the webui to allow both HTTPS and HTTP login. I also had loading problems setting it to HTTPS. Try HTTP only login first then try just HTTPS only login to see if using either one helps.

 

[kfp]

I also had loading problems setting it to HTTPS

Chrome?

 

[makkie2002]

Can you try enabling only “HTTPS” (turn off HTTP to avoid two instances of httpd running) for web UI?

I am afraid that I rebooted the device so the issue is gone (for now). I did not want to have a 100% cpu running overnight . It is a pitty that I did not test it. Next time the issue pops up I will try ... thanks!

 

[Zapek]

I am afraid that I rebooted the device so the issue is gone (for now). I did not want to have a 100% cpu running overnight . It is a pitty that I did not test it. Next time the issue pops up I will try ... thanks!

Did you reboot manually (eg. by plugging off/on the router)? Because when that thing happens (100% I/O usage), you can't reboot by using the UI.

 

[makkie2002]

Did you reboot manually (eg. by plugging off/on the router)? Because when that thing happens (100% I/O usage), you can't reboot by using the UI.

Indeed I had to do it manually. Webui did not want to do it! Even typing "reboot" in a ssh session did not help.

 

[primitivo]

Do you have the remote access to router's GUI enabled? Enabling this on my RT-AC86U running 384.5 makes the GUI unresponsive. SSH also stops working. Just a thought.

 

[bsdsource]

Chrome?

Yeah, one was a Chrome issue. But I knew Chrome was a problem when Merlin mentioned it a long time ago in once of his responses on this forum. I had issues beyond the Chrome oddity.

 

[kfp]

Yeah, one was a Chrome issue. But I knew Chrome was a problem when Merlin mentioned it a long time ago in once of his responses on this forum. I had issues beyond the Chrome oddity.

So what’s the point about complaining about Chrome again, circumstances are not likely to change unless Asus decides to do a massive rewrite of httpd.

 

[bsdsource]

"I had issues beyond the Chrome oddity"

Wasn't complaining about Chrome. I think you misunderstood.

 

[kfp]

"I had issues beyond the Chrome oddity"

Wasn't complaining about Chrome. I think you misunderstood.

Probably, apologies.
What other problems do you have with httpd/HTTPS?