Category Archives: Mysql

Fix cPanel Error -The Email Account Already Exists

  1. Login to your Linux machine via SSH as root user.
  2. Navigate to the following path, locate and remove email account folder in question. /home/domainco/mail/domain.com
  3. Similarly, navigate to the following path, open passwd file with editor of your choice. Remove email account entry from that file and save it. /home/domainco/etc/domain.com
  4. Remove the email id from this file

error: Failed to create domain from /etc/libvirt/qemu/

We had a issue in one of the virtualizor node

Where the server on rebooting the KVM VM were not starting

With error message being

error: Failed to create domain from /etc/libvirt/qemu/
error: Cannot get interface MTU on ‘viifbr0’: No such device

ON checking around found the issue with virtnetwork

Below command fixed the issue

service virtnetwork start

~]# service virtnetwork start
Bringing up viifbr0 – OK
Waiting for 10 seconds…1…2…3…4…5…6…7…8…9…10
Internet connectivity check successful viifbr0 – OK

Open port in Centos 7 

Below are the commands which are to be used in centos 7 to open port 80

[root@onlinesupport ~]# firewall-cmd --permanent --zone=public --add-port=80/tcp success 

[root@onlinesupport]# firewall-cmd --reload


Mysql Upgrade Process

While upgrading mysql in server make sure you make a backup of existing mysql

using commmand mysqldump --all-databases > all_databases.sql

Once you have complete backup , You can proceed with with upgrade of mysql.

/tmp is 100% due to Mysql

Was having an issue where /tmp was getting 100% full every few minutes

on investigation i see the files of 3Gb over there in /tmp

#sql_436_0.MAD

ddvps20 tmp]# ls -al
total 3779332
drwxrwxrwt 12 root root 4096 Sep 21 10:24 .
dr-xr-xr-x 21 root root 4096 Sep 21 09:17 ..
drwxrwxrwt 2 root root 4096 Sep 21 09:17 .font-unix
drwxr-xr-x 2 cpanelsolr cpanelsolr 4096 Sep 21 10:22 hsperfdata_cpanelsolr
drwxr-xr-x 2 root root 4096 Sep 21 10:21 hsperfdata_root
drwxrwxrwt 2 root root 4096 Sep 21 09:17 .ICE-unix
drwx—— 2 root root 16384 Sep 21 09:56 lost+found
lrwxrwxrwx 1 root root 30 Sep 21 10:23 mysql.sock -> ../../var/lib/mysql/mysql.sock
-rw——- 1 cpdigita cpdigita 4096 Sep 21 10:11 .spamassassin1694OHMO4Dtmp
-rw——- 1 cpdigita cpdigita 0 Sep 21 10:17 .spamassassin1694voSq6Ctmp
-rw——- 1 cpdigita cpdigita 0 Sep 21 10:11 .spamassassin1694y0CJyjtmp
-rw——- 1 cpdigita cpdigita 0 Sep 21 10:04 .spamassassin18453ZHMaRtmp
-rw——- 1 cpdigita cpdigita 0 Sep 21 10:06 .spamassassin1845bypIDCtmp
-rw——- 1 cpdigita cpdigita 0 Sep 21 10:03 .spamassassin1845pCtlHqtmp
-rw-rw—- 1 mysql mysql 3866185728 Sep 21 10:07 #sql_436_0.MAD
-rw-rw—- 1 mysql mysql 8192 Sep 21 10:00 #sql_436_0.MAI
-rw——- 1 cpanelsolr cpanelsolr 165 Sep 21 10:22 start_2180387910403356223.properties
drwx—— 3 root root 4096 Sep 21 09:17 systemd-private-1d4af49159364e018772426d7df23a9d-named.service-8XVCsj
drwx—— 3 root root 4096 Sep 21 09:17 systemd-private-1d4af49159364e018772426d7df23a9d-named.service-FyUDBs
drwxrwxrwt 2 root root 4096 Sep 21 09:17 .Test-unix
drwxrwxrwt 2 root root 4096 Sep 21 09:17 .X11-unix
drwxrwxrwt 2 root root 4096 Sep 21 09:17 .XIM-unix

So mysql was going down due to /tmp being full

So as a work around found a better solution

To change the /tmp file to something else for mysql

vi /etc/my.cnf
tmpdir=/mysqltmp

Save the file with :wq

2. Create the /mysqltmp directory

Code:
mkdir /mysqltmp
chmod 1777 /mysqltmp



3. Restart MySQL and check that the tmpdir is now /mysqltmp
Code:
/etc/init.d/mysql restart
mysqladmin var | grep tmpdir
You should see the following return:
Code:
# mysqladmin var | grep tmpdir
| slave_load_tmpdir                       | /mysqltmp
| tmpdir                                  | /mysqltmp

[ERROR] Can’t init tc log Mariadb

2018-03-30 2:06:19 139671858284288 [Note] InnoDB: Dumping buffer pool(s) not yet started
2018-03-30 2:06:19 139672598403328 [Note] Plugin ‘FEEDBACK’ is disabled.
2018-03-30 2:06:19 139672598403328 [Note] Recovering after a crash using tc.log
2018-03-30 2:06:19 139672598403328 [ERROR] Can’t init tc log
2018-03-30 2:06:19 139672598403328 [ERROR] Aborting

Was getting above error in mysql errorlog

The solution to this issue was just to go ahead and delete tc.log

rm -rf /var/lib/mysql/tc.log

Went ahead and restart mysql.. Mysql was online

root@server lib]# rm -rf /var/lib/mysql/tc.log
[root@server lib]# /etc/init.d/mysql restart
MySQL server PID file could not be found! [FAILED]
Starting MySQL.180330 02:07:40 mysqld_safe Logging to ‘/var/lib/mysql/server.cpanel.com.err’.
180330 02:07:40 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
[ OK ]
[root@server lib]#

 

Column count of mysql.user is wrong

Was getting below error while trying to create mysql user in cpanel

Error from MySQL query :(XID 5yuvwf) The system received an error from the “MySQL” database “mysql”: 1805 (Column count of mysql.user is wrong. Expected 43, found 39. The table is probably corrupted):

The migration used a “mysqldump –all-databases” so it included the “mysql” database. Apparently the “mysql.proc” table changed between the versions. The fix on the new server is to run:

 

Below command fixed the issue

mysql_upgrade —force

 

The system could not create the user “triltch” because it conflicts with an unmanaged MySQL database user and an unmanaged PostgreSQL database user

While creating a new account in server was getting below error

The issue was due to mysql user already being present in server

root@srv1 [~]# /scripts/wwwacct trill.com tritch hood773ud
+===================================+
| New Account Info |
+===================================+
| Domain: trill.com
| UserName: tritch
| PassWord: hood773ud
+===================================+

This ok? yes
Checking input data……Done
Validating system setup……Done
…Done
Validating IP……Done
Validating Username……Done
Validating Contact Email……Done
Checking for database conflicts…(XID vh9sa4) The system could not create the user “tritch” because it conflicts with an unmanaged MySQL database user and an unmanaged PostgreSQL database user.

Steps to fix this issue

Login to WHM

Go to PHPmyadmin

Select database Mysql

Go to Option search
Select all tables inside  in option  Inside tables

In option Words or values to search for (wildcard: “%”):  put up name of mysql user which is conflicting >>

Delete all the tables you get in search tables and issue should be resolved

You can also refer in below URL

Solution: cPanel error “cannot create account because it conflicts with an unmanaged MySQL database user”