启动时正常，但是关闭时提示ERROR: No or outdated process id in '/usr/local/activemq//data/activemq.pid'，请问什么原因啊，启动后后台也访问不了
[root@localhost bin]# ./activemq start
INFO: Loading '/usr/local/activemq//bin/env'
INFO: Using java '/usr/java/jdk1.7.0_55/bin/java'
INFO: Starting - inspect logfiles specified in logging.properties and log4j.properties to get details
INFO: pidfile created : '/usr/local/activemq//data/activemq.pid' (pid '8027')
[root@localhost bin]# ./activemq stop
INFO: Loading '/usr/local/activemq//bin/env'
INFO: Using java '/usr/java/jdk1.7.0_55/bin/java'
ERROR: No or outdated process id in '/usr/local/activemq//data/activemq.pid'
INFO: Removing /usr/local/activemq//data/activemq.pid
[root@localhost bin]#
