Outdated redis.conf file prevents app from starting

[jswartwood]

After updating to Redis 2.6.2 I started seeing:

/usr/local/bin/redis-server /usr/local/etc/redis.conf

*** FATAL CONFIG FILE ERROR ***
Reading the configuration file, at line 375
>>> 'vm-enabled no'
Bad directive or wrong number of arguments

The reason for this is because I had at one point an old redis install and thus an old redis.conf file. The brew formula will not overwrite this file as it upgrades to new versions. The lack of updates could be a problem, though I'm not sure what a perfect solution would be. Perhaps checking to see if it has been edited as compared to the version generated via the last install (and allowing overwrite in that case); only disable overwrite if the user has manually changed this file. That is obviously not a flawless solution either. Perhaps a simple disclaimer would be best.

My interim solution was to remove redis.conf via:

rm /usr/local/etc/redis.conf

...and just reinstall redis via brew.

[jswartwood]

There really may not be an action associated with this issue if there is no clear "solution" to this issue, but if nothing else, I wanted to post a fix for anyone else that comes across this problem.

Feel free to close if NOOP is appropriate.

[MikeMcQuaid]

The perfect solution would be to keep a hash of the original etc files, replace them if unchanged and if changed notify the user and install the new file to redis.conf.new. I'll get on this at some point.

[jswartwood]

That would be marvelous. Thanks @MikeMcQuaid

I guess that it is worth stating for bug reporting posterity (SEO) that redis auto-loading failed silently. So if redis fails to load on startup for anyone this may be the culprit. First try running /usr/local/bin/redis-server /usr/local/etc/redis.conf to see if your output matches above.

[MikeMcQuaid]

Fixed properly in 8de552e. The etc stuff will be discussed in #15751.

[hieuvo]

I had same problem, with default repositories, I installed 2.2 version later I download 2.6 version from redis official website and manually install it. When I run

redis-server /etc/redis/redis.conf

it returns the same error, just remove 2.2 version and reinstall 2.16 version, it worked.