Fail to upgrade - Make sure that `gem install json -v '1.8.2'` succeeds before bundling

Installation
1

I try to update from Version 1.2.0.beta5 to 1.2.0.beta6 using Discourse upgrade feature in admin control panel. However, it failed to execute the upgrading.

Here is the log:

$ cd /var/www/discourse && git fetch && git reset --hard HEAD@{upstream}
Checking out files:  22% (1570/7114)   
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Checking out files: 100% (7114/7114)   
Checking out files: 100% (7114/7114), done.
HEAD is now at 16465ed FEATURE: search your bookmarks using in:bookmarks
********************************************************
*** Please be patient, next steps might take a while ***
********************************************************
$ bundle install --deployment --without test --without development
Fetching source index from https://rubygems.org/
Using rake 10.4.2
Using CFPropertyList 2.2.8
Using i18n 0.6.11

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /usr/local/bin/ruby -r ./siteconf20150205-26262-1dc3px6.rb extconf.rb
Cannot allocate memory - /usr/local/bin/ruby -r ./siteconf20150205-26262-1dc3px6.rb extconf.rb  2>&1

Gem files will remain installed in /var/www/discourse/vendor/bundle/ruby/2.0.0/gems/json-1.8.2 for inspection.
Results logged to /var/www/discourse/vendor/bundle/ruby/2.0.0/extensions/x86_64-linux/2.0.0-static/json-1.8.2/gem_make.out
An error occurred while installing json (1.8.2), and Bundler cannot continue.
Make sure that `gem install json -v '1.8.2'` succeeds before bundling.

What should I do to upgrade?

Thanks

2

you need more memory … you are running tight … recommend

cd /var/discourse
git pull
./launcher rebuild app
1 Like
3

Actually this is the second time I face this problem. Rebuild app saved me for the last time. I am using DO droplet

1GB Ram 30GB SSD Disk Singapore 1 Ubuntu Ubuntu 14.04 x64

Should I upgrade or just rebuild app every time I need upgrade Discourse?

Here is my Site Statistics

4

You can not expect /admin/upgrade to work properly if you are memory constrained. Did you configure swap space at least?

5

Yes, I did.

  System load:  0.26               Processes:              109
  Usage of /:   43.5% of 29.40GB   Users logged in:        0
  Memory usage: 84%                IP address for eth0:    xxx
  Swap usage:   59%                IP address for docker0: xxx
6

You have 3 options:

  1. Increase swap size
  2. Upgrade to a 2GB instance
  3. Only upgrade via ./launcher rebuild app
7

The current swap size is 1GB. Does it help if I increase swap size to 2 GB?

swapon -s
Filename                                Type            Size    Used    Priority
/swapfile                               file            1048572 77896   -1
8

Yes it would alleviate pressure during upgrades via web (note, you will be swapping like crazy so performance during upgrade window will be affected and upgrade window will be long)

2 Likes
9

Is there anything else running on the server other than Discourse?

10

Only Discourse.

I just deleted the old 1GB swapfile and added new 2GB swapfile

             total       used       free     shared    buffers     cached
Mem:          994M       928M        65M       100M       1.4M       124M
-/+ buffers/cache:       802M       191M
Swap:         2.0G        93M       1.9G

I will wait for the next upgrade to test.

11

It is unusual, I monitor a lot of 1gb instances and I have never seen out of memory on upgrades.

Did you set number of unicorn processes to 2 during the setup, and the postgres db buffers to 128mb? This is all part of app.yml.

12

At first, it was good to upgrade using web upgrade. I have upgraded several times before the last 2 releases 1.2.0.beta5 and 1.2.0.beta6.

I did

UNICORN_WORKERS: 2
db_shared_buffers: "128MB"
13

Very strange. I wonder what pushed it over the edge.

14

Do you think the available memory at the time I did upgrade was low?

  System load:  0.26               Processes:              109
  Usage of /:   43.5% of 29.40GB   Users logged in:        0
  Memory usage: 84%                IP address for eth0:    xxx
  Swap usage:   59%                IP address for docker0: xxx
15

I would recommend upgrading to a 2GB instance anyway. I have Discourse and 10 small wordpress sites on my server and I’m capping out at 70% memory usage (at the moment). I think the 2gb instance gives you a lot more flexibility.

EDIT: It’s also worth mentioning that I also use memcached on that server as well.

1 Like
16

1GB should really work fine for what you have.

2 Likes
17

I’d love to update to everyone that the new update to 1.2.0.beta8 via web was successful this time.

@codinghorror Do you think 2 GB swap solved this problem?
@sam The forum’s performance was not so bad and upgrade window was fine too. I found that it was even faster than before.

18

Nah, it was probably this: https://meta.discourse.org/tags/memory-leak-feb-09

1 Like