include/poller.php

   1 <?php
   2
   3 use Friendica\App;
   4 use Friendica\Core\Config;
   5
   6 if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) {
   7         $directory = dirname($_SERVER["argv"][0]);
   8
   9         if (substr($directory, 0, 1) != "/")
  10                 $directory = $_SERVER["PWD"]."/".$directory;
  11
  12         $directory = realpath($directory."/..");
  13
  14         chdir($directory);
  15 }
  16
  17 require_once("boot.php");
  18
  19 function poller_run($argv, $argc){
  20         global $a, $db;
  21
  22         if (is_null($a)) {
  23                 $a = new App(dirname(__DIR__));
  24         }
  25
  26         if(is_null($db)) {
  27                 @include(".htconfig.php");
  28                 require_once("include/dba.php");
  29                 $db = new dba($db_host, $db_user, $db_pass, $db_data);
  30                 unset($db_host, $db_user, $db_pass, $db_data);
  31         };
  32
  33         Config::load();
  34
  35         // Quit when in maintenance
  36         if (Config::get('system', 'maintenance', true)) {
  37                 return;
  38         }
  39
  40         $a->set_baseurl(Config::get('system', 'url'));
  41
  42         load_hooks();
  43
  44         $a->start_process();
  45
  46         if ($a->min_memory_reached()) {
  47                 return;
  48         }
  49
  50         if (poller_max_connections_reached()) {
  51                 return;
  52         }
  53
  54         if ($a->maxload_reached()) {
  55                 return;
  56         }
  57
  58         if(($argc <= 1) OR ($argv[1] != "no_cron")) {
  59                 poller_run_cron();
  60         }
  61
  62         if ($a->max_processes_reached()) {
  63                 return;
  64         }
  65
  66         // Checking the number of workers
  67         if (poller_too_much_workers()) {
  68                 poller_kill_stale_workers();
  69                 return;
  70         }
  71
  72         $starttime = time();
  73
  74         while ($r = poller_worker_process()) {
  75
  76                 // Check free memory
  77                 if ($a->min_memory_reached()) {
  78                         return;
  79                 }
  80
  81                 // Count active workers and compare them with a maximum value that depends on the load
  82                 if (poller_too_much_workers()) {
  83                         return;
  84                 }
  85
  86                 if (!poller_execute($r[0])) {
  87                         return;
  88                 }
  89
  90                 // Quit the poller once every hour
  91                 if (time() > ($starttime + 3600))
  92                         return;
  93         }
  94 }
  95
  96 /**
  97  * @brief Execute a worker entry
  98  *
  99  * @param array $queue Workerqueue entry
 100  *
 101  * @return boolean "true" if further processing should be stopped
 102  */
 103 function poller_execute($queue) {
 104
 105         $a = get_app();
 106
 107         $mypid = getmypid();
 108
 109         // Quit when in maintenance
 110         if (Config::get('system', 'maintenance', true)) {
 111                 return false;
 112         }
 113
 114         // Constantly check the number of parallel database processes
 115         if ($a->max_processes_reached()) {
 116                 return false;
 117         }
 118
 119         // Constantly check the number of available database connections to let the frontend be accessible at any time
 120         if (poller_max_connections_reached()) {
 121                 return false;
 122         }
 123
 124         if (!dba::update('workerqueue', array('executed' => datetime_convert(), 'pid' => $mypid),
 125                         array('id' => $queue["id"], 'pid' => 0))) {
 126                 logger("Couldn't update queue entry ".$queue["id"]." - skip this execution", LOGGER_DEBUG);
 127                 dba::commit();
 128                 return true;
 129         }
 130
 131         // Assure that there are no tasks executed twice
 132         $id = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
 133         if (!$id) {
 134                 logger("Queue item ".$queue["id"]." vanished - skip this execution", LOGGER_DEBUG);
 135                 dba::commit();
 136                 return true;
 137         } elseif ((strtotime($id[0]["executed"]) <= 0) OR ($id[0]["pid"] == 0)) {
 138                 logger("Entry for queue item ".$queue["id"]." wasn't stored - skip this execution", LOGGER_DEBUG);
 139                 dba::commit();
 140                 return true;
 141         } elseif ($id[0]["pid"] != $mypid) {
 142                 logger("Queue item ".$queue["id"]." is to be executed by process ".$id[0]["pid"]." and not by me (".$mypid.") - skip this execution", LOGGER_DEBUG);
 143                 dba::commit();
 144                 return true;
 145         }
 146         dba::commit();
 147
 148         $argv = json_decode($queue["parameter"]);
 149
 150         // Check for existance and validity of the include file
 151         $include = $argv[0];
 152
 153         if (!validate_include($include)) {
 154                 logger("Include file ".$argv[0]." is not valid!");
 155                 dba::delete('workerqueue', array('id' => $queue["id"]));
 156                 return true;
 157         }
 158
 159         require_once($include);
 160
 161         $funcname = str_replace(".php", "", basename($argv[0]))."_run";
 162
 163         if (function_exists($funcname)) {
 164
 165                 poller_exec_function($queue, $funcname, $argv);
 166
 167                 dba::delete('workerqueue', array('id' => $queue["id"]));
 168         } else {
 169                 logger("Function ".$funcname." does not exist");
 170         }
 171
 172         return true;
 173 }
 174
 175 /**
 176  * @brief Execute a function from the queue
 177  *
 178  * @param array $queue Workerqueue entry
 179  * @param string $funcname name of the function
 180  * @param array $argv Array of values to be passed to the function
 181  */
 182 function poller_exec_function($queue, $funcname, $argv) {
 183
 184         $a = get_app();
 185
 186         $mypid = getmypid();
 187
 188         $argc = count($argv);
 189
 190         logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." ".$queue["parameter"]);
 191
 192         $stamp = (float)microtime(true);
 193
 194         // We use the callstack here to analyze the performance of executed worker entries.
 195         // For this reason the variables have to be initialized.
 196         if (Config::get("system", "profiler")) {
 197                 $a->performance["start"] = microtime(true);
 198                 $a->performance["database"] = 0;
 199                 $a->performance["database_write"] = 0;
 200                 $a->performance["network"] = 0;
 201                 $a->performance["file"] = 0;
 202                 $a->performance["rendering"] = 0;
 203                 $a->performance["parser"] = 0;
 204                 $a->performance["marktime"] = 0;
 205                 $a->performance["markstart"] = microtime(true);
 206                 $a->callstack = array();
 207         }
 208
 209         // For better logging create a new process id for every worker call
 210         // But preserve the old one for the worker
 211         $old_process_id = $a->process_id;
 212         $a->process_id = uniqid("wrk", true);
 213
 214         $funcname($argv, $argc);
 215
 216         $a->process_id = $old_process_id;
 217
 218         $duration = number_format(microtime(true) - $stamp, 3);
 219
 220         if ($duration > 3600) {
 221                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 1 hour (".round($duration/60, 3).")", LOGGER_DEBUG);
 222         } elseif ($duration > 600) {
 223                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 10 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 224         } elseif ($duration > 300) {
 225                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 5 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 226         } elseif ($duration > 120) {
 227                 logger("Prio ".$queue["priority"].": ".$queue["parameter"]." - longer than 2 minutes (".round($duration/60, 3).")", LOGGER_DEBUG);
 228         }
 229
 230         logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." - done in ".$duration." seconds.");
 231
 232         // Write down the performance values into the log
 233         if (Config::get("system", "profiler")) {
 234                 $duration = microtime(true)-$a->performance["start"];
 235
 236                 if (Config::get("rendertime", "callstack")) {
 237                         if (isset($a->callstack["database"])) {
 238                                 $o = "\nDatabase Read:\n";
 239                                 foreach ($a->callstack["database"] AS $func => $time) {
 240                                         $time = round($time, 3);
 241                                         if ($time > 0)
 242                                                 $o .= $func.": ".$time."\n";
 243                                 }
 244                         }
 245                         if (isset($a->callstack["database_write"])) {
 246                                 $o .= "\nDatabase Write:\n";
 247                                 foreach ($a->callstack["database_write"] AS $func => $time) {
 248                                         $time = round($time, 3);
 249                                         if ($time > 0)
 250                                                 $o .= $func.": ".$time."\n";
 251                                 }
 252                         }
 253                         if (isset($a->callstack["network"])) {
 254                                 $o .= "\nNetwork:\n";
 255                                 foreach ($a->callstack["network"] AS $func => $time) {
 256                                         $time = round($time, 3);
 257                                         if ($time > 0)
 258                                                 $o .= $func.": ".$time."\n";
 259                                 }
 260                         }
 261                 } else {
 262                         $o = '';
 263                 }
 264
 265                 logger("ID ".$queue["id"].": ".$funcname.": ".sprintf("DB: %s/%s, Net: %s, I/O: %s, Other: %s, Total: %s".$o,
 266                         number_format($a->performance["database"] - $a->performance["database_write"], 2),
 267                         number_format($a->performance["database_write"], 2),
 268                         number_format($a->performance["network"], 2),
 269                         number_format($a->performance["file"], 2),
 270                         number_format($duration - ($a->performance["database"] + $a->performance["network"] + $a->performance["file"]), 2),
 271                         number_format($duration, 2)),
 272                         LOGGER_DEBUG);
 273         }
 274
 275         $cooldown = Config::get("system", "worker_cooldown", 0);
 276
 277         if ($cooldown > 0) {
 278                 logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." - in cooldown for ".$cooldown." seconds");
 279                 sleep($cooldown);
 280         }
 281 }
 282
 283 /**
 284  * @brief Checks if the number of database connections has reached a critical limit.
 285  *
 286  * @return bool Are more than 3/4 of the maximum connections used?
 287  */
 288 function poller_max_connections_reached() {
 289
 290         // Fetch the max value from the config. This is needed when the system cannot detect the correct value by itself.
 291         $max = Config::get("system", "max_connections");
 292
 293         // Fetch the percentage level where the poller will get active
 294         $maxlevel = Config::get("system", "max_connections_level", 75);
 295
 296         if ($max == 0) {
 297                 // the maximum number of possible user connections can be a system variable
 298                 $r = q("SHOW VARIABLES WHERE `variable_name` = 'max_user_connections'");
 299                 if ($r)
 300                         $max = $r[0]["Value"];
 301
 302                 // Or it can be granted. This overrides the system variable
 303                 $r = q("SHOW GRANTS");
 304                 if ($r)
 305                         foreach ($r AS $grants) {
 306                                 $grant = array_pop($grants);
 307                                 if (stristr($grant, "GRANT USAGE ON"))
 308                                         if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match))
 309                                                 $max = $match[1];
 310                         }
 311         }
 312
 313         // If $max is set we will use the processlist to determine the current number of connections
 314         // The processlist only shows entries of the current user
 315         if ($max != 0) {
 316                 $r = q("SHOW PROCESSLIST");
 317                 if (!dbm::is_result($r))
 318                         return false;
 319
 320                 $used = count($r);
 321
 322                 logger("Connection usage (user values): ".$used."/".$max, LOGGER_DEBUG);
 323
 324                 $level = ($used / $max) * 100;
 325
 326                 if ($level >= $maxlevel) {
 327                         logger("Maximum level (".$maxlevel."%) of user connections reached: ".$used."/".$max);
 328                         return true;
 329                 }
 330         }
 331
 332         // We will now check for the system values.
 333         // This limit could be reached although the user limits are fine.
 334         $r = q("SHOW VARIABLES WHERE `variable_name` = 'max_connections'");
 335         if (!$r)
 336                 return false;
 337
 338         $max = intval($r[0]["Value"]);
 339         if ($max == 0)
 340                 return false;
 341
 342         $r = q("SHOW STATUS WHERE `variable_name` = 'Threads_connected'");
 343         if (!$r)
 344                 return false;
 345
 346         $used = intval($r[0]["Value"]);
 347         if ($used == 0)
 348                 return false;
 349
 350         logger("Connection usage (system values): ".$used."/".$max, LOGGER_DEBUG);
 351
 352         $level = $used / $max * 100;
 353
 354         if ($level < $maxlevel)
 355                 return false;
 356
 357         logger("Maximum level (".$level."%) of system connections reached: ".$used."/".$max);
 358         return true;
 359 }
 360
 361 /**
 362  * @brief fix the queue entry if the worker process died
 363  *
 364  */
 365 function poller_kill_stale_workers() {
 366         $r = q("SELECT `pid`, `executed`, `priority`, `parameter` FROM `workerqueue` WHERE `executed` > '%s'", dbesc(NULL_DATE));
 367
 368         if (!dbm::is_result($r)) {
 369                 // No processing here needed
 370                 return;
 371         }
 372
 373         foreach ($r AS $pid) {
 374                 if (!posix_kill($pid["pid"], 0)) {
 375                         dba::update('workerqueue', array('executed' => NULL_DATE, 'pid' => 0),
 376                                         array('pid' => $pid["pid"]));
 377                 } else {
 378                         // Kill long running processes
 379
 380                         // Check if the priority is in a valid range
 381                         if (!in_array($pid["priority"], array(PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE)))
 382                                 $pid["priority"] = PRIORITY_MEDIUM;
 383
 384                         // Define the maximum durations
 385                         $max_duration_defaults = array(PRIORITY_CRITICAL => 360, PRIORITY_HIGH => 10, PRIORITY_MEDIUM => 60, PRIORITY_LOW => 180, PRIORITY_NEGLIGIBLE => 360);
 386                         $max_duration = $max_duration_defaults[$pid["priority"]];
 387
 388                         $argv = json_decode($pid["parameter"]);
 389                         $argv[0] = basename($argv[0]);
 390
 391                         // How long is the process already running?
 392                         $duration = (time() - strtotime($pid["executed"])) / 60;
 393                         if ($duration > $max_duration) {
 394                                 logger("Worker process ".$pid["pid"]." (".implode(" ", $argv).") took more than ".$max_duration." minutes. It will be killed now.");
 395                                 posix_kill($pid["pid"], SIGTERM);
 396
 397                                 // We killed the stale process.
 398                                 // To avoid a blocking situation we reschedule the process at the beginning of the queue.
 399                                 // Additionally we are lowering the priority.
 400                                 dba::update('workerqueue',
 401                                                 array('executed' => NULL_DATE, 'created' => datetime_convert(), 'priority' => PRIORITY_NEGLIGIBLE, 'pid' => 0),
 402                                                 array('pid' => $pid["pid"]));
 403                         } else {
 404                                 logger("Worker process ".$pid["pid"]." (".implode(" ", $argv).") now runs for ".round($duration)." of ".$max_duration." allowed minutes. That's okay.", LOGGER_DEBUG);
 405                         }
 406                 }
 407         }
 408 }
 409
 410 /**
 411  * @brief Checks if the number of active workers exceeds the given limits
 412  *
 413  * @return bool Are there too much workers running?
 414  */
 415 function poller_too_much_workers() {
 416         $queues = Config::get("system", "worker_queues", 4);
 417
 418         $maxqueues = $queues;
 419
 420         $active = poller_active_workers();
 421
 422         // Decrease the number of workers at higher load
 423         $load = current_load();
 424         if($load) {
 425                 $maxsysload = intval(Config::get("system", "maxloadavg", 50));
 426
 427                 $maxworkers = $queues;
 428
 429                 // Some magical mathemathics to reduce the workers
 430                 $exponent = 3;
 431                 $slope = $maxworkers / pow($maxsysload, $exponent);
 432                 $queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent));
 433
 434                 $s = q("SELECT COUNT(*) AS `total` FROM `workerqueue` WHERE `executed` <= '%s'", dbesc(NULL_DATE));
 435                 $entries = $s[0]["total"];
 436
 437                 if (Config::get("system", "worker_fastlane", false) AND ($queues > 0) AND ($entries > 0) AND ($active >= $queues)) {
 438                         $s = q("SELECT `priority` FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority` LIMIT 1", dbesc(NULL_DATE));
 439                         $top_priority = $s[0]["priority"];
 440
 441                         $s = q("SELECT `id` FROM `workerqueue` WHERE `priority` <= %d AND `executed` > '%s' LIMIT 1",
 442                                 intval($top_priority), dbesc(NULL_DATE));
 443                         $high_running = dbm::is_result($s);
 444
 445                         if (!$high_running AND ($top_priority > PRIORITY_UNDEFINED) AND ($top_priority < PRIORITY_NEGLIGIBLE)) {
 446                                 logger("There are jobs with priority ".$top_priority." waiting but none is executed. Open a fastlane.", LOGGER_DEBUG);
 447                                 $queues = $active + 1;
 448                         }
 449                 }
 450
 451                 // Create a list of queue entries grouped by their priority
 452                 $running = array(PRIORITY_CRITICAL => 0,
 453                                 PRIORITY_HIGH => 0,
 454                                 PRIORITY_MEDIUM => 0,
 455                                 PRIORITY_LOW => 0,
 456                                 PRIORITY_NEGLIGIBLE => 0);
 457
 458                 $r = q("SELECT COUNT(*) AS `running`, `priority` FROM `process` INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid` GROUP BY `priority`");
 459                 if (dbm::is_result($r))
 460                         foreach ($r AS $process)
 461                                 $running[$process["priority"]] = $process["running"];
 462
 463                 $processlist = "";
 464                 $r = q("SELECT COUNT(*) AS `entries`, `priority` FROM `workerqueue` GROUP BY `priority`");
 465                 if (dbm::is_result($r))
 466                         foreach ($r as $entry) {
 467                                 if ($processlist != "")
 468                                         $processlist .= ", ";
 469                                 $processlist .= $entry["priority"].":".$running[$entry["priority"]]."/".$entry["entries"];
 470                         }
 471
 472                 logger("Load: ".$load."/".$maxsysload." - processes: ".$active."/".$entries." (".$processlist.") - maximum: ".$queues."/".$maxqueues, LOGGER_DEBUG);
 473
 474                 // Are there fewer workers running as possible? Then fork a new one.
 475                 if (!Config::get("system", "worker_dont_fork") AND ($queues > ($active + 1)) AND ($entries > 1)) {
 476                         logger("Active workers: ".$active."/".$queues." Fork a new worker.", LOGGER_DEBUG);
 477                         $args = array("include/poller.php", "no_cron");
 478                         $a = get_app();
 479                         $a->proc_run($args);
 480                 }
 481         }
 482
 483         return($active >= $queues);
 484 }
 485
 486 /**
 487  * @brief Returns the number of active poller processes
 488  *
 489  * @return integer Number of active poller processes
 490  */
 491 function poller_active_workers() {
 492         $workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'poller.php'");
 493
 494         return($workers[0]["processes"]);
 495 }
 496
 497 /**
 498  * @brief Check if we should pass some slow processes
 499  *
 500  * When the active processes of the highest priority are using more than 2/3
 501  * of all processes, we let pass slower processes.
 502  *
 503  * @param string $highest_priority Returns the currently highest priority
 504  * @return bool We let pass a slower process than $highest_priority
 505  */
 506 function poller_passing_slow(&$highest_priority) {
 507
 508         $highest_priority = 0;
 509
 510         $r = q("SELECT `priority`
 511                 FROM `process`
 512                 INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`");
 513
 514         // No active processes at all? Fine
 515         if (!dbm::is_result($r))
 516                 return(false);
 517
 518         $priorities = array();
 519         foreach ($r AS $line)
 520                 $priorities[] = $line["priority"];
 521
 522         // Should not happen
 523         if (count($priorities) == 0)
 524                 return(false);
 525
 526         $highest_priority = min($priorities);
 527
 528         // The highest process is already the slowest one?
 529         // Then we quit
 530         if ($highest_priority == PRIORITY_NEGLIGIBLE)
 531                 return(false);
 532
 533         $high = 0;
 534         foreach ($priorities AS $priority)
 535                 if ($priority == $highest_priority)
 536                         ++$high;
 537
 538         logger("Highest priority: ".$highest_priority." Total processes: ".count($priorities)." Count high priority processes: ".$high, LOGGER_DEBUG);
 539         $passing_slow = (($high/count($priorities)) > (2/3));
 540
 541         if ($passing_slow)
 542                 logger("Passing slower processes than priority ".$highest_priority, LOGGER_DEBUG);
 543
 544         return($passing_slow);
 545 }
 546
 547 /**
 548  * @brief Returns the next worker process
 549  *
 550  * @return string SQL statement
 551  */
 552 function poller_worker_process() {
 553
 554         dba::transaction();
 555
 556         // Check if we should pass some low priority process
 557         $highest_priority = 0;
 558
 559         if (poller_passing_slow($highest_priority)) {
 560                 // Are there waiting processes with a higher priority than the currently highest?
 561                 $r = q("SELECT * FROM `workerqueue`
 562                                 WHERE `executed` <= '%s' AND `priority` < %d
 563                                 ORDER BY `priority`, `created` LIMIT 1",
 564                                 dbesc(NULL_DATE),
 565                                 intval($highest_priority));
 566                 if (dbm::is_result($r)) {
 567                         return $r;
 568                 }
 569                 // Give slower processes some processing time
 570                 $r = q("SELECT * FROM `workerqueue`
 571                                 WHERE `executed` <= '%s' AND `priority` > %d
 572                                 ORDER BY `priority`, `created` LIMIT 1",
 573                                 dbesc(NULL_DATE),
 574                                 intval($highest_priority));
 575         }
 576
 577         // If there is no result (or we shouldn't pass lower processes) we check without priority limit
 578         if (($highest_priority == 0) OR !dbm::is_result($r)) {
 579                 $r = q("SELECT * FROM `workerqueue` WHERE `executed` <= '%s' ORDER BY `priority`, `created` LIMIT 1", dbesc(NULL_DATE));
 580         }
 581         return $r;
 582 }
 583
 584 /**
 585  * @brief Call the front end worker
 586  */
 587 function call_worker() {
 588         if (!Config::get("system", "frontend_worker")) {
 589                 return;
 590         }
 591
 592         $url = App::get_baseurl()."/worker";
 593         fetch_url($url, false, $redirects, 1);
 594 }
 595
 596 /**
 597  * @brief Call the front end worker if there aren't any active
 598  */
 599 function call_worker_if_idle() {
 600         if (!Config::get("system", "frontend_worker")) {
 601                 return;
 602         }
 603
 604         // Do we have "proc_open"? Then we can fork the poller
 605         if (function_exists("proc_open")) {
 606                 // When was the last time that we called the worker?
 607                 // Less than one minute? Then we quit
 608                 if ((time() - Config::get("system", "worker_started")) < 60) {
 609                         return;
 610                 }
 611
 612                 set_config("system", "worker_started", time());
 613
 614                 // Do we have enough running workers? Then we quit here.
 615                 if (poller_too_much_workers()) {
 616                         // Cleaning dead processes
 617                         poller_kill_stale_workers();
 618                         get_app()->remove_inactive_processes();
 619
 620                         return;
 621                 }
 622
 623                 poller_run_cron();
 624
 625                 logger('Call poller', LOGGER_DEBUG);
 626
 627                 $args = array("include/poller.php", "no_cron");
 628                 $a = get_app();
 629                 $a->proc_run($args);
 630                 return;
 631         }
 632
 633         // We cannot execute background processes.
 634         // We now run the processes from the frontend.
 635         // This won't work with long running processes.
 636         poller_run_cron();
 637
 638         clear_worker_processes();
 639
 640         $workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'worker.php'");
 641
 642         if ($workers[0]["processes"] == 0) {
 643                 call_worker();
 644         }
 645 }
 646
 647 /**
 648  * @brief Removes long running worker processes
 649  */
 650 function clear_worker_processes() {
 651         $timeout = Config::get("system", "frontend_worker_timeout", 10);
 652
 653         /// @todo We should clean up the corresponding workerqueue entries as well
 654         q("DELETE FROM `process` WHERE `created` < '%s' AND `command` = 'worker.php'",
 655                 dbesc(datetime_convert('UTC','UTC',"now - ".$timeout." minutes")));
 656 }
 657
 658 /**
 659  * @brief Runs the cron processes
 660  */
 661 function poller_run_cron() {
 662         logger('Add cron entries', LOGGER_DEBUG);
 663
 664         // Check for spooled items
 665         proc_run(PRIORITY_HIGH, "include/spool_post.php");
 666
 667         // Run the cron job that calls all other jobs
 668         proc_run(PRIORITY_MEDIUM, "include/cron.php");
 669
 670         // Run the cronhooks job separately from cron for being able to use a different timing
 671         proc_run(PRIORITY_MEDIUM, "include/cronhooks.php");
 672
 673         // Cleaning dead processes
 674         poller_kill_stale_workers();
 675 }
 676
 677 if (array_search(__file__,get_included_files())===0){
 678         poller_run($_SERVER["argv"],$_SERVER["argc"]);
 679
 680         get_app()->end_process();
 681
 682         killme();
 683 }