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The worker now kills processes that run longer than 3 hours

This commit is contained in:
Michael Vogel 2016-01-24 02:53:21 +01:00
parent e18bb43918
commit 275f7b2660
1 changed files with 30 additions and 11 deletions
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41
include/poller.php
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@ -39,8 +39,10 @@ function poller_run(&$argv, &$argc){
}
// Checking the number of workers
if (poller_too_much_workers(1))
if (poller_too_much_workers(1)) {
poller_kill_stale_workers();
return;
}
if(($argc <= 1) OR ($argv[1] != "no_cron")) {
// Run the cron job that calls all other jobs
@ -50,16 +52,7 @@ function poller_run(&$argv, &$argc){
proc_run("php","include/cronhooks.php");
// Cleaning dead processes
$r = q("SELECT DISTINCT(`pid`) FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'");
foreach($r AS $pid)
if (!posix_kill($pid["pid"], 0))
q("UPDATE `workerqueue` SET `executed` = '0000-00-00 00:00:00', `pid` = 0 WHERE `pid` = %d",
intval($pid["pid"]));
else {
/// @TODO Kill long running processes
/// But: Update processes (like the database update) mustn't be killed
}
poller_kill_stale_workers();
} else
// Sleep four seconds before checking for running processes again to avoid having too many workers
sleep(4);
@ -124,6 +117,32 @@ function poller_run(&$argv, &$argc){
}
/**
* @brief fix the queue entry if the worker process died
*
*/
function poller_kill_stale_workers() {
$r = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'");
foreach($r AS $pid)
if (!posix_kill($pid["pid"], 0))
q("UPDATE `workerqueue` SET `executed` = '0000-00-00 00:00:00', `pid` = 0 WHERE `pid` = %d",
intval($pid["pid"]));
else {
// Kill long running processes
$duration = (time() - strtotime($pid["executed"])) / 60;
if ($duration > 180) {
logger("Worker process ".$pid["pid"]." took more than 3 hours. It will be killed now.");
posix_kill($pid["pid"], SIGTERM);
// Question: If a process is stale: Should we remove it or should we reschedule it?
// By now we rescheduling it. It's maybe not the wisest decision?
q("UPDATE `workerqueue` SET `executed` = '0000-00-00 00:00:00', `pid` = 0 WHERE `pid` = %d",
intval($pid["pid"]));
} else
logger("Worker process ".$pid["pid"]." now runs for ".round($duration)." minutes. That's okay.", LOGGER_DEBUG);
}
}
function poller_too_much_workers($stage) {
$queues = get_config("system", "worker_queues");