Drupal watchdog log

The Drupal watchdog log records Drupal-related actions on your application. The watchdog log is recorded on your server if you have enabled the syslog module.

For a list of the log files handled by Acquia Cloud, including accessing these log files, log file retention, and their locations, see About Acquia Cloud logging. You can also review information about how to streaming 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 alphabeta: https://www.example.com|1503091321|
custom_module||https://example.com/documents||0||Warning: Invalid
argument supplied for foreach() in views_join->build_join

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 The internal IP address of the server handling this request
2 alphabeta The internal Acquia site 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 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 ar gument 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 Acquia Cloud log files — for more information, see Using HTTP request IDs

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 also available for Drupal 7 and Drupal 8

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