我的activemq突然下降（不知道为什么）。当我尝试启动服务时
sudo service activemq starts
看起来很好。但是，当我使用时检查状态
sudo service activemq status
我收到以下消息。
activemq.service - LSB: Starts ActiveMQ
Loaded: loaded (/etc/init.d/activemq; bad; vendor preset: enabled)
Active: active (exited) since Fri 2018-03-30 19:51:54 UTC; 44min ago
Docs: man:systemd-sysv-generator(8)
Process: 1253 ExecStart=/etc/init.d/activemq start (code=exited, status=0/SUCCESS)
Tasks: 0
Memory: 0B
CPU: 0
Mar 30 19:51:54 ip-172-31-43-187 systemd[1]: Starting LSB: Starts ActiveMQ...
Mar 30 19:51:54 ip-172-31-43-187 activemq[1253]: INFO: Loading '/etc/default/activemq'
Mar 30 19:51:54 ip-172-31-43-187 activemq[1253]: INFO: Using java '/usr/bin/java'
Mar 30 19:51:54 ip-172-31-43-187 activemq[1253]: INFO: Starting - inspect logfiles specified in logging.properties and log4j.properties to get details
Mar 30 19:51:54 ip-172-31-43-187 activemq[1253]: INFO: changing to user 'activemq' to invoke java
Mar 30 19:51:54 ip-172-31-43-187 su[1352]: Successful su for activemq by root
Mar 30 19:51:54 ip-172-31-43-187 su[1352]: + ??? root:activemq
Mar 30 19:51:54 ip-172-31-43-187 su[1352]: pam_unix(su:session): session opened for user activemq by (uid=0)
Mar 30 19:51:54 ip-172-31-43-187 activemq[1253]: INFO: pidfile created : '/etc//data/activemq.pid' (pid '1370')
Mar 30 19:51:54 ip-172-31-43-187 systemd[1]: Started LSB: Starts ActiveMQ.
请注意，如果我使用ps aux，我可以找到activemq pid。我目前正在使用AWS免费套餐。我的Linux服务器系统是
Distributor ID: Ubuntu
Description: Ubuntu 16.04.3 LTS
Release: 16.04
Codename: xenial
有任何想法吗？家伙。请帮忙。