Moodle

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.8.5
• Fix Version/s: 1.8.5, 1.9
• Component/s: Libraries, Performance
• Labels:

  None
• Environment:

  php > 5.1.2, Apache > 2, windows vista business edition, linux Ubuntu > 6, moodle 2007021541 (1.8.4+)

the cached data are referenced by their ids > $rcache>data[$table][$id], $rcache->data[$table] is an associative array.
but some php native functions used to manage array data return indexed arrays. This is the case of the array_shift function.

the new rcache_set function has corrupted some cached data of our moodle making the script to enter in an infinite loop in the lib/accesslib.php - get_parent_cats function.

the problem is coming from this lines :

function rcache_set($table, $id, $rec) {
global $CFG, $MCACHE, $rcache;

if ($CFG->cachetype === 'internal') {
if (!isset($rcache->data[$table])) { $rcache->data[$table] = array(); }
if (!isset($rcache->data[$table][$id]) and count($rcache->data[$table]) > $CFG->intcachemax) { array_shift($rcache->data[$table]); }
$rcache->data[$table][$id] = clone($rec);

to resolve the problem we have to make our own array_shift function or replace the array_shift($rcache->data[$table]); line by something like :

$keys = array_keys($rcache->data[$table]);
$firstkey = $keys[0];
unset($rcache->data[$table][$firstkey]);

hope that's help

• Assignee:

  Petr Škoda (skodak)

  Reporter:

  Eric Villard

  Participants:

  Eric Villard, Petr Škoda (skodak)

• Created:

  25/Feb/08 11:47 PM

  Updated:

  17/Dec/10 1:02 PM

  Resolved:

  26/Feb/08 5:24 AM