Solved. See https://github.com/grpc/grpc/issues/13412
在 2019年7月15日星期一 UTC+8下午12:16:05，[email protected]写道： > > Hi all, > > Our application experienced a annoying problem. When enabling grpc.so > extension, php script with multiprocess hangs even we don't use any grpc > api. > > This is reproducible code. I can reproduce it in PHP 5.6 and PHP 7.1. > After disable grpc.so extension, it can exit normally. > > <?php > > function startWith($str, $prefix) { > if (strlen($prefix) > strlen($str)) { > return false; > } > > return substr($str, 0, strlen($prefix)) === $prefix; > } > /** > * @param $daemonName string > * @param $callback callback > * @param $processAmount int > * @param $timeOut if it's not zero, child process will exit > after $timeOut seconds > */ > function restartDaemons($daemonName, $callback, $processAmount = 1, > $timeOut = 0) > { > $daemonName = strtolower($daemonName); > // control child processes via file existence > $pidDir = RUNTIME_PATH . DIRECTORY_SEPARATOR . 'pid'; > if (!is_dir($pidDir)) { > mkdir($pidDir, 0777, true); > } > //clear pid files > $pidDirHandle = opendir($pidDir); > while ($fileName = readdir($pidDirHandle)) { > if (startWith($fileName, $daemonName . '.worker.')) { > @unlink($pidDir . DIRECTORY_SEPARATOR . $fileName); > echo 'CLEAN_PID_FILE' . "\n"; > } > } > > for ($i = 0; $i < $processAmount; $i++) { > $pid = pcntl_fork(); > if ($pid == 0) { > //child processe logic > $pid = getmypid(); > $pidFile = $pidDir . DIRECTORY_SEPARATOR . $daemonName . > '.worker.' . $pid; > > touch($pidFile); > echo "worker start: " . ($i + 1) . "/$processAmount" . > PHP_EOL; > $startDaemonTime[$i] = microtime(true); > while (file_exists($pidFile)) { > if($timeOut > 0 && microtime(true) - > $startDaemonTime[$i] > $timeOut){ > break; > } > $roundStartTime = microtime(true); > $runSuccess = $callback($processAmount, $i); > if (!$runSuccess) { > sleep(1); > } else { > } > } > echo "worker exit: " . ($i + 1) . "/$processAmount" . > PHP_EOL; > exit(0); > } > } > //parent process waits for child processes > for ($i = 0; $i < $processAmount; $i++) { > $spId = pcntl_wait($status); > if ($status != 0) { > } > } > } > > restartDaemons('haha', function() {return true;}, 10, 10); > > > I use strace to see what's last system call, this is output > > [root@c3d1d6a011ac /]# strace -p 209 > Process 209 attached > futex(0x7fe261ffb764, FUTEX_WAIT_PRIVATE, 1, NULL > > Please help me. Guide me to some debug approaches or something. > > Thanks. > -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/cfcb1744-21d5-4f6f-bfec-85a20e594bf3%40googlegroups.com.
