Agent 运行了2 天后，莫名地自动关闭了

[wenjianbao]

运行日志：
2018-08-26 18:38:30 [ NettyServerWorker-3-1:89277503 ] - [ INFO ] [JobX] Send response for request id:20112,action:
PING
2018-08-26 18:38:30 [ NettyServer30:89277503 ] - [ INFO ] [JobX]:execute:/usr/local/bin/php /alidata/www/backup-my
sql/index.php production BackupMySql backup,pid:dc5c5dfb417543d29d214ab0ce654d5c
2018-08-26 18:38:30 [ NettyServerWorker-3-1:89277682 ] - [ INFO ] [JobX] Send response for request id:20113,action:
EXECUTE
2018-08-26 18:39:03 [ JobXShutdownHook:89310587 ] - [ INFO ] [JobX] run shutdown hook now...

最后执行了 run shutdown hook
请问 这个是啥原因造成的啊？

[wolfboys]

Agent端同时执行任务多少个？后续版本会加上最大运行任务数和Agent HA,确保Agent高可用