Sonarqube 5.2 启动时没有错误，但无法访问。直到几天前它工作正常。1. Sonar 配置为在端口 9000 上运行，但该端口是空闲的。2. Firefox 无法访问该网址。
这是 sonar.log 条目：
*--> Wrapper Started as Daemon
Launching a JVM...
Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org
Copyright 1999-2006 Tanuki Software, Inc. All Rights Reserved.
2018.04.11 22:44:47 INFO app[o.s.p.m.JavaProcessLauncher] Launch process[search]: /usr/java/jre1.8.0_161/bin/java -Djava.awt.headless=true -Xmx1G -Xms256m -Xss256k -Djava.net.preferIPv4Stack=true -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+HeapDumpOnOutOfMemoryError -Djava.io.tmpdir=/scratch/aime/Sonar/sonarqube-5.2/temp -cp ./lib/common/*:*./lib/search/* *org.sonar.search.SearchServer /tmp/sq-process3042361883049663302properties
2018.04.11 22:44:47 INFO es[o.s.p.ProcessEntryPoint] Starting search
2018.04.11 22:44:47 INFO es[o.s.s.SearchSettings] Elasticsearch listening on 127.0.0.1:9001
2018.04.11 22:44:48 INFO es[o.elasticsearch.node] [sonar-1523511887257] version[1.7.2], pid[1648], build[e43676b/2015-09-14T09:49:53Z]
2018.04.11 22:44:48 INFO es[o.elasticsearch.node] [sonar-1523511887257] initializing ...
2018.04.11 22:44:48 INFO es[o.e.plugins] [sonar-1523511887257] loaded [], sites []*
sonar.properties 没有任何变化，直到几天前声纳都很好。
出了什么问题？