Contents
What are watchdog logs?
log file contains entries about pings sent to the collector to ensure that the daemon is still running. The name of this log begins with the date for which events are records, for example 2007.08.
What is watchdog in Drupal?
The standard way to log Drupal error messages is with the watchdog function. The watchdog function logs your messages to your database, where you can then view them from your Drupal Reports URL.
What does Drupal log?
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.
How do I log messages in Drupal?
Log messages created with the \Drupal::logger service can be viewed and filtered on the Reports page of the administrative UI. In the Administrative menu, go to Reports > Recent log messages. On this page is a list of recent log messages which you can filter by type and severity.
How can I see watchdog?
Both Drupal 6 and Drupal 7 put the viewable version of watchdog logs at /admin/reports/dblog . The core database logging module needs to be enabled, and users who want to view them need the access site reports permission. The actual database table is watchdog .
Where are the Drupal logs stored?
The files are written to site/default/files/logs by default, but can be created in any location that PHP can access. The verbosity of the file log is configurable, so that only events above a specific severity are recorded.
What is the watchdog process?
A watchdog timer (sometimes called a computer operating properly or COP timer, or simply a watchdog) is an electronic or software timer that is used to detect and recover from computer malfunctions. During normal operation, the computer regularly restarts the watchdog timer to prevent it from elapsing, or “timing out”.
What is Drupal error?
An “Internal Server Error” is an error on the web server that you’re trying to access. An “Internal Server Error” often occurs due to: Misconfigured Drupal core file or folder read and write permissions. Misconfigured web server file or folder read and write permissions.
What should I do with my watchdog timer?
If you have a watchdog timer in your system, you must choose the timeout period carefully, ensure that the watchdog timer is tested regularly, and, if you are multitasking, monitor all of the tasks. In addition, the recovery actions you implement can have a big impact on overall system reliability.
How does a watchdog work in a multi tasking system?
The first half of the article will assume that there is no RTOS present. The second half covers a scheme for making use of a watchdog in a multi-tasking system. The hardware component of a watchdog is a counter that is set to a certain value and then counts down towards zero.
Can a watchdog be used on an embedded system?
In a complex embedded system, it may not be possible to guarantee that there are no bugs, but by using a watchdog you can guarantee that none of those bugs will hang the system indefinitely. Once your watchdog has bitten, you have to decide what action to take.
Is there a maximum timeout for the watchdog?
On some microcontrollers the built-in watchdog has a maximum timeout on the order of a few hundred milliseconds. It you decide that you want more time, you need to multiply that in software. Say the hardware provides a 100ms timeout, but your policy says that you only want to check the system for sanity every 300ms.