SOLVED LFD Hung Task Timeout Error

theluli

Member
Nov 19, 2015
10
2
3
Kosovo
cPanel Access Level
DataCenter Provider
Hi everyone

INFO: task lfd - (child) p:21289 blocked for more than 120 seconds
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this messages

This error is appearing every morning on my server , and web pages are not loaded then
Anyone can give me advice
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,912
2,241
363
Hello @theluli,

Can you run the below command and let us know the output?

Code:
grep "blocked for more than 120 seconds" /var/log/messages
Additionally, please post the output from the following command:

Code:
cat /etc/redhat-release
Thank you.
 

theluli

Member
Nov 19, 2015
10
2
3
Kosovo
cPanel Access Level
DataCenter Provider
Hello @theluli,

Can you run the below command and let us know the output?

Code:
grep "blocked for more than 120 seconds" /var/log/messages
Additionally, please post the output from the following command:

Code:
cat /etc/redhat-release
Thank you.
Hi Michael

l am using
CentOS Linux release 7.5.1804 (Core)

Please see the photo below , since with grep l dont get aanything

Also the server it freeze every-night round 00:08 , l have to restart otherwise websites dont work
 

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cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,912
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Also the server it freeze every-night round 00:08
Hello @theluli,

The information you provided suggests this is happening due to a lack of available resources on the server. I recommend accessing the server before and during the times it routinely freezes and checking the resource usage. We provide a guide here that offers some commands you can use to check the load, memory usage, and disk I/O:

Tutorial - Troubleshooting high server loads on Linux servers

Let us know what you find.

Thank you.
 

theluli

Member
Nov 19, 2015
10
2
3
Kosovo
cPanel Access Level
DataCenter Provider
Hello @theluli,

The information you provided suggests this is happening due to a lack of available resources on the server. I recommend accessing the server before and during the times it routinely freezes and checking the resource usage. We provide a guide here that offers some commands you can use to check the load, memory usage, and disk I/O:

Tutorial - Troubleshooting high server loads on Linux servers

Let us know what you find.

Thank you.
Hi Michel

The problem is that l can not troubleshoot what's happen , because system it freeze
This is what l get before rebooting the system

Code:
Nov 01 00:00:01 vps1.example spamd[2001]: spamd: connection from localhost [::1]:50076 to port 783, fd 5
Nov 01 00:00:01 vps1.example spamd[1557]: prefork: child states: I
Nov 01 00:00:01 vps1.example systemd[1]: Started Session 120 of user root.
Nov 01 00:00:01 vps1.example systemd[1]: Starting Session 120 of user root.
Nov 01 00:00:01 vps1.example systemd[1]: Started Session 119 of user root.
Nov 01 00:00:01 vps1.example systemd[1]: Starting Session 119 of user root.
Nov 01 00:00:01 vps1.example systemd[1]: Started Session 122 of user root.
Nov 01 00:00:01 vps1.example systemd[1]: Starting Session 122 of user root.
Nov 01 00:00:01 vps1.example systemd[1]: Started Session 121 of user root.
Nov 01 00:00:01 vps1.example systemd[1]: Starting Session 121 of user root.
Nov 01 00:00:01 vps1.example CROND[12972]: (root) CMD (/usr/lib64/sa/sa1 1 1)
Nov 01 00:00:01 vps1.example CROND[12971]: (root) CMD (/usr/sbin/csf --lfd restart > /dev/null 2>&1)
Nov 01 00:00:01 vps1.example CROND[12974]: (root) CMD (/usr/local/cpanel/scripts/shrink_modsec_ip_database -x 2>&1)
Nov 01 00:00:01 vps1.example CROND[12973]: (root) CMD (/usr/local/cpanel/scripts/dcpumon-wrapper >/dev/null 2>&1)
Nov 01 00:00:01 vps1.example dovecot[1481]: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, s
Nov 01 00:00:02 vps1.example systemd[1]: Stopping ConfigServer Firewall & Security - lfd...
Nov 01 00:00:02 vps1.example systemd[1]: lfd.service: main process exited, code=killed, status=9/KILL
Nov 01 00:00:02 vps1.example systemd[1]: Unit lfd.service entered failed state.
Nov 01 00:00:02 vps1.example systemd[1]: lfd.service failed.
Nov 01 00:00:02 vps1.example systemd[1]: Starting ConfigServer Firewall & Security - lfd...
Nov 01 00:00:02 vps1.example dovecot[1481]: lmtp(13046): Connect from local
Nov 01 00:00:02 vps1.example dovecot[1481]: lmtp(13046): Disconnect from local: Successful quit
Nov 01 00:00:02 vps1.example systemd[1]: Started ConfigServer Firewall & Security - lfd.
Nov 01 00:00:03 vps1.example dovecot[1481]: imap-login: Login: user=<__cpanel__service__auth__imap___usey8m4bx5uikahkeep1jutfroxcu70cljw2t1p8sdikg...
Nov 01 00:00:03 vps1.example dovecot[1481]: imap(__cpanel__service__auth__imap___usey8m4bx5uikahkeep1jutfroxcu70cljw2t1p8sdikggitv0q0ampdff_9jf2): Lo
Nov 01 00:00:03 vps1.example pure-ftpd[13094]: ([email protected]) [INFO] New connection from 127.0.0.1
Nov 01 00:00:03 vps1.example pure-ftpd[13094]: ([email protected]) [INFO] __cpanel__service__auth__ftpd__1KoC4ys6AkzqBGdTrq20bb7lfqphlCY3PnsNn3fqTPGUnvxMYb
Nov 01 00:00:03 vps1.example pure-ftpd[13094]: (__cpanel__service__auth__ftpd__1[email protected]127.0
Nov 01 00:00:18 vps1.example kernel: Firewall: *TCP_IN Blocked* IN=ens192 OUT= MAC=00:50:56:ab:2b:90:ec:30:91:e3:eb:80:08:00 SRC=removedIP DST=80
Nov 01 00:00:57 vps1.example kernel: Firewall: *TCP_IN Blocked* IN=ens192 OUT= MAC=00:50:56:ab:2b:90:ec:30:91:e3:eb:80:08:00 SRC=removedIP DST=80
Nov 01 00:01:01 vps1.example systemd[1]: Started Session 123 of user root.
Nov 01 00:01:01 vps1.example systemd[1]: Starting Session 123 of user root.
Nov 01 00:01:01 vps1.example CROND[13175]: (root) CMD (run-parts /etc/cron.hourly)
Nov 01 00:01:01 vps1.example run-parts(/etc/cron.hourly)[13178]: starting 0anacron
Nov 01 00:01:01 vps1.example anacron[13184]: Anacron started on 2018-11-01
Nov 01 00:01:01 vps1.example run-parts(/etc/cron.hourly)[13186]: finished 0anacron
Nov 01 00:01:01 vps1.example anacron[13184]: Normal exit (0 jobs run)
Nov 01 00:01:17 vps1.example kernel: Firewall: *TCP_IN Blocked* IN=ens192 OUT= MAC=00:50:56:ab:2b:90:ec:30:91:e3:eb:80:08:00 SRC=removedIP DST=8
Nov 01 00:02:11 vps1.example kernel: Firewall: *TCP_IN Blocked* IN=ens192 OUT= MAC=00:50:56:ab:2b:90:ec:30:91:e3:eb:80:08:00 SRC=removedIP DST=80
Nov 01 00:02:41 vps1.example kernel: Firewall: *TCP_IN Blocked* IN=ens192 OUT= MAC=00:50:56:ab:2b:90:ec:30:91:e3:eb:80:08:00 SRC=removedIP DST=80
Nov 01 00:03:09 vps1.example kernel: Firewall: *TCP_IN Blocked* IN=ens192 OUT= MAC=00:50:56:ab:2b:90:ec:30:91:e3:eb:80:08:00 SRC=removedIP DST=80.8
Nov 01 00:03:11 vps1.example kernel: Firewall: *TCP_IN Blocked* IN=ens192 OUT= MAC=00:50:56:ab:2b:90:ec:30:91:e3:eb:80:08:00 SRC=removedIP DST=80.
Nov 01 00:03:47 vps1.example kernel: Firewall: *TCP_IN Blocked* IN=ens192 OUT= MAC=00:50:56:ab:2b:90:ec:30:91:e3:eb:80:08:00 SRC=removedIP DST=80.
 
Last edited by a moderator:

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,912
2,241
363
Hello @theluli,

Feel free to open a support ticket and we can take a closer look to see if there's anything related to cPanel & WHM causing the issue. You can post the ticket number here and we will update this thread with the outcome.

Thank you.
 

theluli

Member
Nov 19, 2015
10
2
3
Kosovo
cPanel Access Level
DataCenter Provider
Hello @theluli,

Feel free to open a support ticket and we can take a closer look to see if there's anything related to cPanel & WHM causing the issue. You can post the ticket number here and we will update this thread with the outcome.

Thank you.
Hi Michael

Thanks a lot , l have open TT , and they helped me , there was problem with vmare tools , had to reinstall , and than from last night did not have problem

Have nice day
 
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cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,912
2,241
363
Hello @theluli,

I'm glad to see it worked out. Thanks for sharing the outcome.