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What should the file owner & group be of /usr/local/mysql and all contained files & directories? MySQL was working fine, but after I did sudo chown -R $USER:staff /usr/local to install Homebrew, MySQL couldn't automatically start on startup, and on the MySQL Preferences panel, I got "Warning: The /usr/local/mysql/data directory is not owned by the 'mysql' or '_mysql' user," and when I clicked Start MySQL Server, it didn't connect.

To fix this, I ran sudo chown -R _mysql:wheel /usr/local/mysql/data. Then, I closed & opened System Preferences. The warning went away, and when I clicked Start MySQL Server, it started!

MySQL seems to be responding fine now, but I just guessed at this solution. Is what I did correct?

Glorfindel
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ma11hew28
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2 Answers2

44

Looks valid to me. This is what my mysql folder looks like:

drwxr-xr-x  17 root    wheel    578 May  7  2010 .
drwxr-xr-x   8 root    wheel    272 Jun 11  2010 ..
-rw-r--r--   1 root    wheel  17987 May  7  2010 COPYING
-rw-r--r--   1 root    wheel   5139 May  7  2010 EXCEPTIONS-CLIENT
-rw-r--r--   1 root    wheel   9339 May  7  2010 INSTALL-BINARY
-rw-r--r--   1 root    wheel  62989 May  7  2010 README
drwxr-xr-x  46 root    wheel   1564 May  7  2010 bin
drwxr-x---  15 _mysql  wheel    510 Jan 21 08:15 data
drwxr-xr-x   4 root    wheel    136 May  7  2010 docs
drwxr-xr-x  34 root    wheel   1156 May  7  2010 include
drwxr-xr-x  22 root    wheel    748 Jun  3  2010 lib
drwxr-xr-x   4 root    wheel    136 May  7  2010 man
drwxr-xr-x  15 root    wheel    510 May  7  2010 mysql-test
drwxr-xr-x   3 root    wheel    102 May  7  2010 scripts
drwxr-xr-x  35 root    wheel   1190 May  7  2010 share
drwxr-xr-x  29 root    wheel    986 May  7  2010 sql-bench
drwxr-xr-x  16 root    wheel    544 May  7  2010 support-files

How did you install MySQL it if it didn't hook everything up correctly itself?

EDIT: and this is the general flavor of the data folder:

drwxr-x---  15 _mysql  wheel       510 Jan 24 08:15 .
drwxr-xr-x  17 root    wheel       578 May  7  2010 ..
-rw-rw----   1 _mysql  wheel    158773 Jan 24 08:16 $USER.local.err
-rw-rw----   1 _mysql  wheel         4 Jan 24 08:15 $USER.local.pid
drwx------   6 _mysql  wheel       204 Jun 16  2010 $SOME_DB_NAME1
drwx------   6 _mysql  wheel       204 Jun  8  2010 $SOME_DB_NAME2
drwx------  15 _mysql  wheel       510 Jan 18 11:23 $SOME_DB_NAME3
drwx------  12 _mysql  wheel       408 Jan 20 14:40 $SOME_DB_NAME4
-rw-rw----   1 _mysql  wheel   5242880 Jan 24 08:15 ib_logfile0
-rw-rw----   1 _mysql  wheel   5242880 Jan 24 08:15 ib_logfile1
-rw-rw----   1 _mysql  wheel  18874368 Jan 21 17:31 ibdata1
drwx------  85 _mysql  wheel      2890 Jun  3  2010 $SOME_DB_NAME5
drwx------  85 _mysql  wheel      2890 Jun  3  2010 $SOME_DB_NAME6
drwxr-x---  71 _mysql  wheel      2414 Jun  3  2010 mysql
drwx------  21 _mysql  wheel       714 Aug 31 17:27 $SOME_DB_NAME7

I don't run Homebrew on my machine, so I don't know if this is of much help as far as that goes.

peterh
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Hoatzin
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    Thanks! What does your data directory look like? MySQL was working fine before I ran `sudo chown -R $USER:staff /usr/local` – ma11hew28 Jan 22 '11 at 23:25
  • Edited the post above with the relevant stuff. Hope it helps. – Hoatzin Jan 25 '11 at 04:11
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    I might add that if you've had multiple installations of mysql, you should run the command like: `sudo chown -R _mysql:wheel /usr/local/mysql-*/data` so it gets the data folders of all mysql installations – Hector Villarreal Jul 02 '14 at 20:12
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I had the exact same problem and MattDiPasquale’s answer worked for me. I had to keep running mysqld all the time to ensure MySQL was running properly. When I looked at MySQL in the System Preferences I realised I had the same error.