/**
* @param Job $job
* @param LBFactory $lbFactory
* @param StatsdDataFactory $stats
* @param float $popTime
* @return array Map of status/error/timeMs
*/
private function executeJob(Job $job, LBFactory $lbFactory, $stats, $popTime)
{
$jType = $job->getType();
$msg = $job->toString() . " STARTING";
$this->logger->debug($msg);
$this->debugCallback($msg);
// Run the job...
$rssStart = $this->getMaxRssKb();
$jobStartTime = microtime(true);
try {
$fnameTrxOwner = get_class($job) . '::run';
// give run() outer scope
$lbFactory->beginMasterChanges($fnameTrxOwner);
$status = $job->run();
$error = $job->getLastError();
$this->commitMasterChanges($lbFactory, $job, $fnameTrxOwner);
// Run any deferred update tasks; doUpdates() manages transactions itself
DeferredUpdates::doUpdates();
} catch (Exception $e) {
MWExceptionHandler::rollbackMasterChangesAndLog($e);
$status = false;
$error = get_class($e) . ': ' . $e->getMessage();
}
// Always attempt to call teardown() even if Job throws exception.
try {
$job->teardown($status);
} catch (Exception $e) {
MWExceptionHandler::logException($e);
}
// Commit all outstanding connections that are in a transaction
// to get a fresh repeatable read snapshot on every connection.
// Note that jobs are still responsible for handling replica DB lag.
$lbFactory->flushReplicaSnapshots(__METHOD__);
// Clear out title cache data from prior snapshots
MediaWikiServices::getInstance()->getLinkCache()->clear();
$timeMs = intval((microtime(true) - $jobStartTime) * 1000);
$rssEnd = $this->getMaxRssKb();
// Record how long jobs wait before getting popped
$readyTs = $job->getReadyTimestamp();
if ($readyTs) {
$pickupDelay = max(0, $popTime - $readyTs);
$stats->timing('jobqueue.pickup_delay.all', 1000 * $pickupDelay);
$stats->timing("jobqueue.pickup_delay.{$jType}", 1000 * $pickupDelay);
}
// Record root job age for jobs being run
$rootTimestamp = $job->getRootJobParams()['rootJobTimestamp'];
if ($rootTimestamp) {
$age = max(0, $popTime - wfTimestamp(TS_UNIX, $rootTimestamp));
$stats->timing("jobqueue.pickup_root_age.{$jType}", 1000 * $age);
}
// Track the execution time for jobs
$stats->timing("jobqueue.run.{$jType}", $timeMs);
// Track RSS increases for jobs (in case of memory leaks)
if ($rssStart && $rssEnd) {
$stats->updateCount("jobqueue.rss_delta.{$jType}", $rssEnd - $rssStart);
}
if ($status === false) {
$msg = $job->toString() . " t={$timeMs} error={$error}";
$this->logger->error($msg);
$this->debugCallback($msg);
} else {
$msg = $job->toString() . " t={$timeMs} good";
$this->logger->info($msg);
$this->debugCallback($msg);
}
return ['status' => $status, 'error' => $error, 'timeMs' => $timeMs];
}