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  1. Moodle
  2. MDL-51109

When scheduled task fails no debug info is provided

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    • MOODLE_28_STABLE, MOODLE_29_STABLE
    • MOODLE_28_STABLE, MOODLE_29_STABLE
    • MDL-51109-master
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      Expected output: For all tests, repeat with $CFG->debug set to DEBUG_DEVELOPER and then at a lower level, debug info should only be displayed in developer mode.

      1. Install the attached local plugin.
      2. Run $ php admin/tool/task/cli/schedule_task.php --execute=\\local_breaktask\\task
        brokenphp         and ensure the expected output is seen
      3. Run php admin/tool/task/cli/schedule_task.php --execute=\\local_breaktask\\task
        brokendb         and ensure the expected output is seen
      4. Run php admin/tool/task/cli/schedule_task.php --execute=\\local_breaktask\\task
        brokenexception         and ensure the expected output is seen
      5. Run cron and ensure the three above tasks are failed and ensure expected output is seen
      Show
      Expected output: For all tests, repeat with $CFG->debug set to DEBUG_DEVELOPER and then at a lower level, debug info should only be displayed in developer mode. Install the attached local plugin. Run $ php admin/tool/task/cli/schedule_task.php --execute=\\local_breaktask\\task brokenphp and ensure the expected output is seen Run php admin/tool/task/cli/schedule_task.php --execute=\\local_breaktask\\task brokendb and ensure the expected output is seen Run php admin/tool/task/cli/schedule_task.php --execute=\\local_breaktask\\task brokenexception and ensure the expected output is seen Run cron and ensure the three above tasks are failed and ensure expected output is seen

    Description

      When a scheduled task fails with some sort of database issue (see MDLSITE-4145 for one example where an index is being violated, you could write a basic bit of code to demonstrate it, but haven't got time right now), the exception handler traps the error but prevents an useful output - even in DEBUG_DEVELOPER mode.

      To find what was going wrong I had to do:

      diff --git a/admin/tool/task/cli/schedule_task.php b/admin/tool/task/cli/schedule_task.php
      		 
      index 6904d48..f5700a6 100644
      		 
      --- a/admin/tool/task/cli/schedule_task.php
      		 
      +++ b/admin/tool/task/cli/schedule_task.php
      		 
      @@ -148,7 +148,7 @@ if ($execute = $options['execute']) {
      		 
               }
      		 
               mtrace("... used " . ($DB->perf_get_queries() - $predbqueries) . " dbqueries");
      		 
               mtrace("... used " . (microtime(true) - $pretime) . " seconds");
      		 
      -        mtrace("Task failed: " . $e->getMessage());
      		 
      +        mtrace("Task failed: " . $e->getMessage().$e->debuginfo);
      		 
               \core\task\manager::scheduled_task_failed($task);
      		 
               get_mailer('close');
      		 
               exit(1);

      There should be a way to see that error without having to hack code. We could do it only in the cli runner, or when debug mode is set, etc.

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          Discovered while testing

          Bug - A problem which impairs or prevents Moodle from functioning correctly. MDLSITE-4145 Learn.moodle is trying to re-award a previously awarded badge

          • Low - Cosmetic problems, nice-to-have features
          • Resolved

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              poltawski Dan Poltawski
              poltawski Dan Poltawski
              Ankit Agarwal Ankit Agarwal
              David Monllaó David Monllaó
              Jun Pataleta Jun Pataleta
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              3 Vote for this issue
              Watchers:
              4 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:
                14/Sep/15