Backup has failed. pg_dump: server version: 9.6.3; pg_dump version: 9.5.10

Hi folks!

I’m getting notified by discourse’s system user about that my backup has failed. On the doc it says that Discourse accepts Postgres 9.3+ versions and i’m using 9.6.3.

[2017-12-02 03:32:09] [STARTED]
[2017-12-02 03:32:09] 'system' has started the backup!
[2017-12-02 03:32:09] Marking backup as running...
[2017-12-02 03:32:09] Making sure '/var/www/discourse/tmp/backups/default/2017-12-02-033209' exists...
[2017-12-02 03:32:09] Making sure '/var/www/discourse/public/backups/default' exists...
[2017-12-02 03:32:09] Pausing sidekiq...
[2017-12-02 03:32:09] Waiting for sidekiq to finish running jobs...
[2017-12-02 03:32:09] Dumping the public schema of the database...
[2017-12-02 03:32:09] perl: warning: Setting locale failed.
[2017-12-02 03:32:09] perl: warning: Please check that your locale settings:
[2017-12-02 03:32:09] LANGUAGE = (unset),
[2017-12-02 03:32:09] LC_ALL = (unset),
[2017-12-02 03:32:09] LANG = "pt_BR.UTF-8"
[2017-12-02 03:32:09] are supported and installed on your system.
[2017-12-02 03:32:09] perl: warning: Falling back to the standard locale ("C").
[2017-12-02 03:32:09] pg_dump: server version: 9.6.3; pg_dump version: 9.5.10
[2017-12-02 03:32:09] pg_dump: aborting because of server version mismatch
[2017-12-02 03:32:09] EXCEPTION: pg_dump failed
[2017-12-02 03:32:09] /var/www/discourse/lib/backup_restore/backuper.rb:170:in `dump_public_schema'
/var/www/discourse/lib/backup_restore/backuper.rb:35:in `run'
/var/www/discourse/lib/backup_restore/backup_restore.rb:163:in `block in start!'
/var/www/discourse/lib/backup_restore/backup_restore.rb:160:in `fork'
/var/www/discourse/lib/backup_restore/backup_restore.rb:160:in `start!'
/var/www/discourse/lib/backup_restore/backup_restore.rb:15:in `backup!'
/var/www/discourse/app/jobs/regular/create_backup.rb:8:in `execute'
/var/www/discourse/app/jobs/base.rb:134:in `block (2 levels) in perform'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/rails_multisite-1.1.2/lib/rails_multisite/connection_management.rb:77:in `with_connection'
/var/www/discourse/app/jobs/base.rb:129:in `block in perform'
/var/www/discourse/app/jobs/base.rb:125:in `each'
/var/www/discourse/app/jobs/base.rb:125:in `perform'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:188:in `execute_job'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:170:in `block (2 levels) in process'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/middleware/chain.rb:128:in `block in invoke'
/var/www/discourse/lib/sidekiq/pausable.rb:80:in `call'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/middleware/chain.rb:133:in `invoke'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:169:in `block in process'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:141:in `block (6 levels) in dispatch'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/job_retry.rb:97:in `local'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:140:in `block (5 levels) in dispatch'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq.rb:36:in `block in <module:Sidekiq>'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:136:in `block (4 levels) in dispatch'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:204:in `stats'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:131:in `block (3 levels) in dispatch'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/job_logger.rb:7:in `call'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:130:in `block (2 levels) in dispatch'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/job_retry.rb:72:in `global'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:129:in `block in dispatch'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/logging.rb:44:in `with_context'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/logging.rb:38:in `with_job_hash_context'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:128:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:168:in `process'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:85:in `process_one'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/processor.rb:73:in `run'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/util.rb:16:in `watchdog'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/sidekiq-5.0.5/lib/sidekiq/util.rb:25:in `block in safe_thread'
[2017-12-02 03:32:09] Notifying 'system' of the end of the backup...

Will i have to downgrade my Postgres` versions?

Thanks in advance,
Michael Coelho.

Yes, we currently support PostgreSQL 9.5.x.


Thanks @Falco, i’ll try it out!

If you find a way to install 9.5 on Ubuntu 17.10, I’d love to hear about it. I think that it should be possible with Docker, but I’ve not yet managed.

My solution thus far has been using the docker development environment in discourse/bin/docker, which has a few quirks, but it works.

I actually got DIscourse to work just fine with 9.6, but then I couldn’t restore the import I’d done to a production container.

The official PostgreSQL apt repo currently has: PostgreSQL 9.2, 9.3, 9.4, 9.5, 9.6, 10, 11devel.

Just follow the official instructions: PostgreSQL: Linux downloads (Ubuntu)


sudo sh -c 'echo "deb zesty-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
sudo apt-get install wget ca-certificates
wget --quiet -O - | sudo apt-key add -
sudo apt update
sudo apt install postgresql-9.5

Thanks, @falco! I figured there should be a way. I tried what I thought was that, but all of the binaries were named with the version names in them or something, and I couldn’t make that work. I’ve had on my list to come back to figuring this out for a couple weeks now (I generally work at my desktop that’s still on 16.04 and don’t use the laptop much when I’m not travelling).

TL;DR: You saved the day!


Maybe you got bit by the fact that they support: 14.04, 16.04, 17.04 and 18.04 but skipped 17.10.

In the above snipped I set do you get 17.04 packages, that in my experience work just fine.

I bet that was it! And I somehow didn’t think to use the 17.04 repo. I’ll feel a little less silly, so that’s a big help too. :slight_smile:

@techAPJ, if I get ambitious, I’ll see if I can find an elegant way to add this to My goal is to have my new_discourse_database script to not only wipe attachments and make a new database with my admin account, but also install the development environment and create databases owned by the current user if it’s not already installed. I think that if I fix the PSQL version problem it’s done.

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