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  1. Moodle
  2. MDL-40891

MUC breaks on purge all caches - race condition when creating directories

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Details

    • Bug
    • Status: Closed
    • Critical
    • Resolution: Fixed
    • 2.5, 2.6
    • 2.4.6, 2.5.2
    • Caching
    • MOODLE_25_STABLE, MOODLE_26_STABLE
    • MOODLE_24_STABLE, MOODLE_25_STABLE
    • w31_MDL-40891_m26_mkdirrace
    • Hide

      1/ enable js cache and disable theme designer mode
      2/ hit purge all caches repeatedly like crazy
      3/ verify the styles are always present and error log is polluted only with " PHP Warning: mkdir(): File exists in..."

      Show
      1/ enable js cache and disable theme designer mode 2/ hit purge all caches repeatedly like crazy 3/ verify the styles are always present and error log is polluted only with " PHP Warning: mkdir(): File exists in..."

    Description

      I noticed a weird error in theme serving scripts:

      Invalid permissions detected in $CFG->dataroot directory, administrator has to fix permissions.

      Debug info: [cachedir]/cachestore_file/default_application/core_config can not be created, check permissions.
      Error code: invaliddatarootpermissions

      Stack trace:

      • line 1264 of /lib/setuplib.php: invalid_dataroot_permissions thrown
      • line 269 of /cache/stores/file/lib.php: call to make_writable_directory()
      • line 278 of /cache/classes/factory.php: call to cachestore_file->initialise()
        *line 152 of /cache/classes/helper.php: call to cache_factory->create_store_from_config()
        *line 137 of /cache/classes/helper.php: call to cache_helper::initialise_cachestore_instances()
      • line 234 of /cache/classes/factory.php: call to cache_helper::get_cache_stores()
        *line 183 of /cache/classes/factory.php: call to cache_factory->create_cache()
        *line 171 of /cache/classes/loaders.php: call to cache_factory->create_cache_from_definition()
      • line 1408 of /lib/moodlelib.php: call to cache::make()
      • line 741 of /lib/setuplib.php: call to get_config()
      • line 595 of /lib/setup.php: call to initialise_cfg()
      • line 122 of /theme/styles.php: call to require()

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              skodak Petr Skoda
              skodak Petr Skoda
              Sam Hemelryk Sam Hemelryk
              Rossiani Wijaya Rossiani Wijaya
              Matteo Scaramuccia, David Woloszyn, Huong Nguyen, Jake Dallimore, Meirza, Michael Hawkins, Raquel Ortega, Safat Shahin, Stevani Andolo
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              Dates

                Created:
                Updated:
                Resolved:
                9/Sep/13