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Merge pull request #7499 from annando/new_defer

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Worker: The retrial value can now skip retrial levels
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Philipp 2019-08-11 23:27:54 +02:00 committed by GitHub
commit e9fc2af1c3
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 42 additions and 8 deletions
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46
src/Core/Worker.php
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@ -1193,6 +1193,32 @@ class Worker
return true;
}
/**
* Returns the next retrial level for worker jobs.
* This function will skip levels when jobs are older.
*
* @param array $queue Worker queue entry
* @param integer $max_level maximum retrial level
* @return integer the next retrial level value
*/
private static function getNextRetrial($queue, $max_level)
{
$created = strtotime($queue['created']);
$retrial_time = time() - $created;
$new_retrial = $queue['retrial'] + 1;
$total = 0;
for ($retrial = 0; $retrial <= $max_level + 1; ++$retrial) {
$delay = (($retrial + 3) ** 4) + (rand(1, 30) * ($retrial + 1));
$total += $delay;
if (($total < $retrial_time) && ($retrial > $queue['retrial'])) {
$new_retrial = $retrial;
}
}
Logger::info('New retrial for task', ['id' => $queue['id'], 'created' => $queue['created'], 'old' => $queue['retrial'], 'new' => $new_retrial]);
return $new_retrial;
}
/**
* Defers the current worker entry
*/
@ -1208,27 +1234,31 @@ class Worker
$id = $queue['id'];
$priority = $queue['priority'];
if ($retrial > 14) {
Logger::log('Id ' . $id . ' had been tried 14 times. We stop now.', Logger::DEBUG);
$max_level = Config::get('system', 'worker_defer_limit');
$new_retrial = self::getNextRetrial($queue, $max_level);
if ($new_retrial > $max_level) {
Logger::info('The task exceeded the maximum retry count', ['id' => $id, 'max_level' => $max_level, 'retrial' => $new_retrial]);
return;
}
// Calculate the delay until the next trial
$delay = (($retrial + 3) ** 4) + (rand(1, 30) * ($retrial + 1));
$delay = (($new_retrial + 2) ** 4) + (rand(1, 30) * ($new_retrial));
$next = DateTimeFormat::utc('now + ' . $delay . ' seconds');
if (($priority < PRIORITY_MEDIUM) && ($retrial > 2)) {
if (($priority < PRIORITY_MEDIUM) && ($new_retrial > 3)) {
$priority = PRIORITY_MEDIUM;
} elseif (($priority < PRIORITY_LOW) && ($retrial > 5)) {
} elseif (($priority < PRIORITY_LOW) && ($new_retrial > 6)) {
$priority = PRIORITY_LOW;
} elseif (($priority < PRIORITY_NEGLIGIBLE) && ($retrial > 7)) {
} elseif (($priority < PRIORITY_NEGLIGIBLE) && ($new_retrial > 8)) {
$priority = PRIORITY_NEGLIGIBLE;
}
Logger::log('Defer execution ' . $retrial . ' of id ' . $id . ' to ' . $next . ' - priority old/new: ' . $queue['priority'] . '/' . $priority, Logger::DEBUG);
Logger::info('Deferred task', ['id' => $id, 'retrial' => $new_retrial, 'next_execution' => $next, 'old_prio' => $queue['priority'], 'new_prio' => $priority]);
$stamp = (float)microtime(true);
$fields = ['retrial' => $retrial + 1, 'next_try' => $next, 'executed' => DBA::NULL_DATETIME, 'pid' => 0, 'priority' => $priority];
$fields = ['retrial' => $new_retrial, 'next_try' => $next, 'executed' => DBA::NULL_DATETIME, 'pid' => 0, 'priority' => $priority];
DBA::update('workerqueue', $fields, ['id' => $id]);
self::$db_duration += (microtime(true) - $stamp);
self::$db_duration_write += (microtime(true) - $stamp);

4
static/defaults.config.php
View file

@ -427,6 +427,10 @@ return [
// Setting 0 would allow maximum worker queues at all times, which is not recommended.
'worker_load_exponent' => 3,
// worker_defer_limit (Integer)
// Per default the systems tries delivering for 15 times before dropping it.
'worker_defer_limit' => 15,
// xrd_timeout (Integer)
// Timeout in seconds for fetching the XRD links.
'xrd_timeout' => 20,