The Drupal watchdog log (drupal-watchdog.log) records Drupal-related actions on your application. The watchdog log is recorded on your infrastructure if you have enabled the syslog module.
For a list of the log files handled by Cloud Platform, including accessing these log files, log file retention, and their locations, see About Cloud Platform logging. You can also review information about how to stream Drupal watchdog log entries in real time from your browser.
Parsing the log file
The following line is a representative example of the data written into your website’s Drupal watchdog log:
Aug 18 21:22:01 10.0.0.1 alphabeta: https://www.example.com|1503091321|
custom_module|151.0.0.1|https://example.com/documents||0||Warning: Invalid
argument supplied for foreach() in views_join->build_join
request_id="v-00000000-845b-0000-8178-22000ab832c9"
Each of the items in the Drupal watchdog is noted in the following table, along with its description:
| Position | Data | Description |
|---|---|---|
| 0 | Aug 18 21:22:01 | The date and time of the request |
| 1 | 10.0.0.1 | The internal hostname of the infrastructure handling this request. If no hostname exists, the internal IP address will be displayed. |
| 2 | alphabeta | The internal Acquia website name this request is for |
| 3 | http://www.example.com | The domain this request was for |
| 4 | 1503091321 | The Unix timestamp of the request |
| 5 | custom_module | The name of the module issuing this message |
| 6 | 151.0.0.1 | The originating IP address of this request |
| 7 | https://example.com/documents | The full URL of the requested page. |
| 8 | (blank) | The referrer for this request (the example line is blank for this value) |
| 9 | 0 | The Drupal user ID initiating the request. 0 means an anonymous user |
| 10 | (blank) | A relevant link, if one was passed to the logging function |
| 11 | Warning: Invalid argument supplied for foreach() in views_join->build_join | Message |
| 12 | request_id="v-00000000-845b-0000-8178-22000ab832c9" | A unique ID attached to this request by the load balancer, which appears in several Cloud Platform log files. For more information, see Using HTTP request IDs |
If you want to search for a website in drupal-watchdog.log, you can use any of the following commands, which allow you to search log entries for a specific domain name:
grep: Allows you to search uncompressed log fileszgrep: Allows you to search compressed log files ending in.tar.gz
In Drupal 7, drush vget syslog_format displays information about the ordering and content of fields in the watchdog logs. API documentation about Drupal’s watchdog log is available for Drupal 7.