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Job for mysqld.service failed See “systemctl status mysqld.service , journalctl -xe & tail -30 /var/log/mysql/error.log "

Posted August 23, 2017 96.4k views
MySQLWordPressUbuntu 16.04

I don’t know what i have to do now seeing this error(mysql.service won’t start) bcz i’m that much linux guy.....
Pls give some solution asap

systemctl status mysqld.service

● mysql.service - MySQL Community Server
   Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
   Active: activating (start-post) (Result: exit-code) since Wed 2017-08-23 19:17:34 UTC; 24s ago
  Process: 26606 ExecStart=/usr/sbin/mysqld (code=exited, status=1/FAILURE)
  Process: 26597 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
 Main PID: 26606 (code=exited, status=1/FAILURE);         : 26607 (mysql-systemd-s)
    Tasks: 2
   Memory: 324.0K
      CPU: 520ms
   CGroup: /system.slice/mysql.service
           └─control
             ├─26607 /bin/bash /usr/share/mysql/mysql-systemd-start post
             └─26676 sleep 1

Aug 23 19:17:34 ubuntu-1gb-nyc3-01 systemd[1]: Starting MySQL Community Server...
Aug 23 19:17:35 ubuntu-1gb-nyc3-01 systemd[1]: mysql.service: Main process exited, code=exited, status=1/FAILURE

journalctl -xe

-- Unit mysql.service has begun starting up.
Aug 23 19:19:05 ubuntu-1gb-nyc3-01 audit[26888]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/26888/status" pid=2688
Aug 23 19:19:05 ubuntu-1gb-nyc3-01 audit[26888]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/" p
Aug 23 19:19:05 ubuntu-1gb-nyc3-01 audit[26888]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/26888/status" pid=2688
Aug 23 19:19:05 ubuntu-1gb-nyc3-01 kernel: audit: type=1400 audit(1503515945.954:748): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld"
Aug 23 19:19:05 ubuntu-1gb-nyc3-01 kernel: audit: type=1400 audit(1503515945.954:749): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld"
Aug 23 19:19:05 ubuntu-1gb-nyc3-01 kernel: audit: type=1400 audit(1503515945.954:750): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld"
Aug 23 19:19:06 ubuntu-1gb-nyc3-01 systemd[1]: mysql.service: Main process exited, code=exited, status=1/FAILURE
Aug 23 19:19:23 ubuntu-1gb-nyc3-01 sshd[26930]: Connection closed by 116.31.116.40 port 40327 [preauth]
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 systemd[1]: Failed to start MySQL Community Server.
-- Subject: Unit mysql.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysql.service has failed.
--
-- The result is failed.
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 systemd[1]: mysql.service: Unit entered failed state.
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 systemd[1]: mysql.service: Failed with result 'exit-code'.
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 systemd[1]: mysql.service: Service hold-off time over, scheduling restart.
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 systemd[1]: Stopped MySQL Community Server.
-- Subject: Unit mysql.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysql.service has finished shutting down.
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 systemd[1]: Starting MySQL Community Server...
-- Subject: Unit mysql.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit mysql.service has begun starting up.
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 audit[26981]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/26981/status" pid=2698
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 audit[26981]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/" p
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 audit[26981]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/26981/status" pid=2698
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 kernel: audit: type=1400 audit(1503515976.446:751): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld"
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 kernel: audit: type=1400 audit(1503515976.446:752): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld"
Aug 23 19:19:36 ubuntu-1gb-nyc3-01 kernel: audit: type=1400 audit(1503515976.446:753): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld"
Aug 23 19:19:37 ubuntu-1gb-nyc3-01 systemd[1]: mysql.service: Main process exited, code=exited, status=1/FAILURE
Aug 23 19:19:48 ubuntu-1gb-nyc3-01 sudo[27025]:     root : TTY=pts/0 ; PWD=/root ; USER=root ; COMMAND=/bin/journalctl -xe
Aug 23 19:19:48 ubuntu-1gb-nyc3-01 sudo[27025]: pam_unix(sudo:session): session opened for user root by root(uid=0)

tail -30 /var/log/mysql/error.log


2017-08-23T19:22:08.951104Z 0 [Warning] Changed limits: max_open_files: 1024 (requested 5000)
2017-08-23T19:22:08.951207Z 0 [Warning] Changed limits: table_open_cache: 431 (requested 2000)
2017-08-23T19:22:09.177161Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-08-23T19:22:09.181318Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.19-0ubuntu0.16.04.1) starting as process 27514 ...
2017-08-23T19:22:09.190896Z 0 [Note] InnoDB: PUNCH HOLE support available
2017-08-23T19:22:09.190945Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-08-23T19:22:09.190960Z 0 [Note] InnoDB: Uses event mutexes
2017-08-23T19:22:09.190971Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2017-08-23T19:22:09.190980Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.8
2017-08-23T19:22:09.190990Z 0 [Note] InnoDB: Using Linux native AIO
2017-08-23T19:22:09.191768Z 0 [Note] InnoDB: Number of pools: 1
2017-08-23T19:22:09.192044Z 0 [Note] InnoDB: Using CPU crc32 instructions
2017-08-23T19:22:09.195523Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2017-08-23T19:22:09.213977Z 0 [Note] InnoDB: Completed initialization of buffer pool
2017-08-23T19:22:09.219177Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2017-08-23T19:22:09.233451Z 0 [Note] InnoDB: Highest supported file format is Barracuda.
2017-08-23T19:22:09.252993Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2017-08-23T19:22:09.253125Z 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2017-08-23T19:22:09.264465Z 0 [Warning] InnoDB: 1048576 bytes should have been written. Only 851968 bytes written. Retrying for the remaining bytes.
2017-08-23T19:22:09.264519Z 0 [Warning] InnoDB: Retry attempts for writing partial data failed.
2017-08-23T19:22:09.264539Z 0 [ERROR] InnoDB: Write to file ./ibtmp1failed at offset 5242880, 1048576 bytes should have been written, only 851968 were written. Operating system error number 28. Check that your OS and file s2017-08-23T19:22:09.866980Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"
2017-08-23T19:22:09.867026Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2017-08-23T19:22:09.867033Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2017-08-23T19:22:09.867040Z 0 [ERROR] Failed to initialize plugins.
2017-08-23T19:22:09.867043Z 0 [ERROR] Aborting

2017-08-23T19:22:09.867049Z 0 [Note] Binlog end
2017-08-23T19:22:09.867098Z 0 [Note] Shutting down plugin 'MyISAM'
2017-08-23T19:22:09.867485Z 0 [Note] /usr/sbin/mysqld: Shutdown complete

and i’m using ubuntu 16.04(1gb) Droplet

Thanks in advance

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mformainuddin
By:
mformainuddin
19 comments
  • iteagle03 August 23, 2017
    Reply Report

    Error was here (in bold) in the sysout:
    2017-08-23T19:22:09.253125Z 0 [Note] InnoDB: Setting file ’./ibtmp1’ size to 12 MB. Physically writing the file full; Please wait …
    2017-08-23T19:22:09.264465Z 0 [Warning] InnoDB: 1048576 bytes should have been written. Only 851968 bytes written. Retrying for the remaining bytes.
    2017-08-23T19:22:09.264519Z 0 [Warning] InnoDB: Retry attempts for writing partial data failed.
    2017-08-23T19:22:09.264539Z 0 [ERROR] InnoDB: Write to file ./ibtmp1failed at offset 5242880, 1048576 bytes should have been written, only 851968 were written. Operating system error number 28. Check that your OS and file s2017-08-23T19:22:09.866980Z 0 [Note] InnoDB: Removed temporary tablespace data file: “ibtmp1”

    How much free space do you have on your droplet?

  • mformainuddin August 23, 2017
    Reply Report

    @iteagle03

    Here it is:

    Filesystem      Size  Used Avail Use% Mounted on
udev            992M     0  992M   0% /dev
tmpfs           201M   11M  190M   6% /run
/dev/vda1        30G   29G  4.8M 100% /
tmpfs          1001M     0 1001M   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs          1001M     0 1001M   0% /sys/fs/cgroup
tmpfs           201M     0  201M   0% /run/user/0
  • iteagle03 August 23, 2017
    Reply Report 
    Filesystem      Size  Used Avail Use% Mounted on
udev            992M     0  992M   0% /dev
tmpfs           201M   11M  190M   6% /run
**/dev/vda1        30G   29G  4.8M 100% /**
tmpfs          1001M     0 1001M   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs          1001M     0 1001M   0% /sys/fs/cgroup
tmpfs           201M     0  201M   0% /run/user/0

    You appear to be out of space. From ’/’ if you run this command it will tell you your top 10 directories in terms of disk space used.

    du -aBM 2>/dev/null | sort -nr | head -n 10

    You can change the ‘10’ into any value you want … 20, 30, etc.

    There is another more “pretty” tool I found but you may not have enough space to install the utility.

  • mformainuddin August 23, 2017
    Reply Report

    @iteagle03

    ok i typed:

    du -aBM 2>/dev/null | sort -nr | head -n 10

    and it shows: 

    root@ubuntu-1gb-nyc3-01:~# du -aBM 2>/dev/null | sort -nr | head -n 30
5M      .
4M      ./images
3M      ./images/itv
2M      ./images/itv.zip
1M      ./.xsession-errors
1M      ./.Xauthority
1M      ./.vnc/xstartup
1M      ./.vnc/ubuntu-1gb-nyc3-01:1.log
1M      ./.vnc/passwd
1M      ./.vnc
1M      ./.viminfo
1M      ./Videos
1M      ./Templates
1M      ./.ssh
1M      ./Public
1M      ./.profile
1M      ./player/yendifplayer.js
1M      ./player/yendifplayer.css
1M      ./player/subtitles.vtt
1M      ./player/player.swf
1M      ./player/LICENSE.md
1M      ./player/index.html
1M      ./player/images/play.png
1M      ./player/images/icons_white.png
1M      ./player/images/icons_black.png
1M      ./player/images
1M      ./player/embed.js
1M      ./player
1M      ./Pictures
1M      ./.nano/search_history

    Then what i need to do???

  • iteagle03 August 23, 2017
    Reply Report

    And you ran this command from the root of the directory ( ’/’ )? If you run ‘pwd’ and get something other than ’/’ you are not at the root directory. Once you are at root ('cd /’) and run that du command, you should get something like this:

    1936M   .
1209M   ./usr
361M    ./usr/src
327M    ./usr/lib
264M    ./usr/share
246M    ./var
222M    ./usr/bin
212M    ./lib
173M    ./var/lib
159M    ./lib/modules

    Most of my disk usage is in the ’/usr’ directory, which is fine. I’m only using about 2GB out of 30GB for my droplet. :)

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3 answers
emmaakin November 22, 2017

You should first setup a swapfile. and also add line like this
innodb_buffer_pool_size = 20M to the end of the line of your /etc/mysql/my.cnf

!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/
[mysqld]
innodb_buffer_pool_size = 20M```
Reply Report
Aprexer August 23, 2017

Could you let us know what you’ve already tried to do to resolve your issue?
Have you googled your error? If so have you tried those solutions?
Have you tried purging mysql-server and start again?

Reply Report
mformainuddin August 23, 2017

@Aprexer

I tried start and stop mysql.service and install mysql tuner… and try to open my.cnf .... that’s it

Reply Report
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