启动命令执行后 报错,但是还能执行,系统用的 Ubuntu

php test_wk.php start
Workerman start in DEBUG mode
PHP Warning:  file_get_contents(/home/yycc/yy.cc.cn/newinterface/Workerman/../_home_yycc_yy.cc.cn_newinterface_test_wk.php.pid): failed to open stream: No such file or directory in /home/yycc/yy.cc.cn/newinterface/Workerman/Worker.php on line 609
PHP Stack trace:
PHP   1. {main}() /home/yycc/yy.cc.cn/newinterface/test_wk.php:0
PHP   2. Workerman\Worker::runAll() /home/yycc/yy.cc.cn/newinterface/test_wk.php:27
PHP   3. Workerman\Worker::parseCommand() /home/yycc/yy.cc.cn/newinterface/Workerman/Worker.php:415
PHP   4. file_get_contents() /home/yycc/yy.cc.cn/newinterface/Workerman/Worker.php:609

SCREAM:  Error suppression ignored for
Warning: file_get_contents(/home/yycc/yy.cc.cn/newinterface/Workerman/../_home_yycc_yy.cc.cn_newinterface_test_wk.php.pid): failed to open stream: No such file or directory in /home/yycc/yy.cc.cn/newinterface/Workerman/Worker.php on line 609

Call Stack:
    0.0002     354112   1. {main}() /home/yycc/yy.cc.cn/newinterface/test_wk.php:0
    0.0022     592688   2. Workerman\Worker::runAll() /home/yycc/yy.cc.cn/newinterface/test_wk.php:27
    0.0026     611576   3. Workerman\Worker::parseCommand() /home/yycc/yy.cc.cn/newinterface/Workerman/Worker.php:415
    0.0028     612104   4. file_get_contents() /home/yycc/yy.cc.cn/newinterface/Workerman/Worker.php:609

----------------------- WORKERMAN -----------------------------
Workerman version:3.3.5          PHP version:7.0.8-3+deb.sury.org~trusty+4
------------------------ WORKERS -------------------------------
user          worker        listen        processes status
yycc   none          none           1