The site is published, your design is pristine, and it is ready for action... so, now what? While you may think you’re in the clear, site issues are likely to arise at some point. To protect your business from a site-crash nightmare, there are necessary precautions you should take. Customer support engineers Lanette and Ally are here to prepare you for the worst; using their 3.5 years of Drupal experience to explain common issues they’ve encountered, how to identify them, and how to remedy problems quickly. In this webinar, you will learn: - Early steps to take to maintain site health - Preparing your team for common site complications - Tips and tricks for troubleshooting if problems arise - Third-party tools to help you resolve issues

1. Troubleshooting Drupal
When it hits the fan!
http://bit.ly/drupaltips

2. Who are we?
→Lanette Miller & Ally Gonthier
→Support Goddesses of Acquia

3. What is this about?

4. The Basics
All Contacts and Addresses
IP Addresses and SSH Passwords
Connections
Backups
Git (Version Control)

5. Know Your Stack

6. More things to know!
→Logs
→Drush
→New Relic/Traceview
→Helpful Browser Extensions
 User Agent Switcher
 Modify Headers
 Live HTTP Headers

8. What is the
Problem?
Take a deep breath…

9. Questions to ask
→What do you see?
→What do you expect to see?
→When did it start?
→What has changed?
→Is it reproducible?
→Logged in versus anonymous users?

10. Where did the Signal Flow Break?

11. Bypass DNS with etc/hosts

12. etc/hosts
##
# Host Database
###
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
##change below here
127.0.0.1 d8b12.dd
127.0.0.1 eelmiller.dev.dd
127.0.0.1 eelmiller.test.dd
127.0.0.1 broad.test.dd
127.0.0.1 d8test2.dd
127.0.0.1 d8.dd
23.23.23.24 myserver.com

13. Chrome Dev Tools

14. Views – show SQL
→Show SQL queries

15. Devel Module – dpm()

16. Drush
→Learn to love drush
→Drush Commands can be modified with
--uri=www.sitename.com
-v verbose
-d debug
-s simulate

17. One time login link
→For User 1 / Admin User
drush uli --uri=www.sitename.com
→For any other user
drush uli –uri=www.sitename.com --name=username
drush uli –uri=www.sitename.com --uid=55
drush uli –uri=www.sitename.com --mail=user@mail.com

18. Working with Users
→ Create a User
drush ucrt username --mail=user@mail.com --password=“1234”
→ Change a password
drush upwd username –password=“newpass”
→ Assign a role to a user
drush urol “administrator” --name=username

19. Working with Modules and Themes
→Enable module
drush en modulename
→Disable module
drush dis module
→Enable theme and set as default
drush en themename
drush vset theme_default themename

20. Rebuilding the Registry
https://www.drupal.org/project/registry_rebuild
drush rr
drush php-eval “registry_rebuild();”
PHP Fatal error: Class
'EntityAPIControllerExportable' not found
in
...sites/all/modules/rules/includes/rules.
core.inc on line 11

21. Simulate a page load
drush -dv ev 'menu_execute_active_handler()'

22. Database problems
drush sqlc
mysql --user=username --password=password –
host=ipddress --database=dbname
UPDATE system set status=0 where
name=modulename;

23. SELECT table_name AS "Tables", round(((data_length +
index_length) / 1024 / 1024), 2) "Size in MB" FROM
information_schema.TABLES ORDER BY (data_length +
index_length) DESC;

24. Database problems
cache_form
TRUNCATE TABLE cache_form;
TRUNCATE TABLE cache;
TRUNCATE TABLE cache_block;
TRUNCATE TABLE cache_bootstrap;…

25. Using Curl to see the headers
→curl –SLIXGET http://address
S – show errors
L – follow redirects
I – headers only
XGET – do a “get”

26. curl –SLIXGET http://sitename.com

27. Memory Problems
→Memory Profiler module
https://www.drupal.org/project/memory_profiler
→Conditional memory overrides
https://docs.acquia.com/articles/conditionally-
increasing-memory-limits
→“unable to allocate memory for pool”
APC or Zend OpCache

28. Log Magic
→grep
grep –i “string to look for” filename.log
grep –ic “string to look for” filename.log
→zgrep for compressed log files
zgrep –i “string to look for” filename.log.gz
→cat and zcat

29. Count of all http access codes
awk '{print $9}' access.log | sort | uniq -c | sort

30. Top urls for an access code
cat access.log | awk '{ if ($9 == 404) print $7 }' | sort | uniq -c | sort -rn | head -n 20
Replace 404 with error code

31. Top IP addresses for error code with URL
cat access.log| grep '" 404'|awk '{print $1 $7}'| sort| uniq -c| sort -nr| head
Replace 404 with error code

32. cat access.log | awk '{if ($4 ~ /2015:14/) print $1 }' | sort | uniq -c | sort -nr | head -20
Replace “2015:14” with current year and hour
Top IP address for an hour

33. URL’s visited by an IP address
cat access.log | awk '{ if ($1 == ”xxx.xx.xx.xx") print $7 }' | sort | uniq -c | sort -nr | head -20
Replace “xxx.xx.xx.xx” with ip address

34. Thanks!
http://bit.ly/drupaltips