环境信息：
centos release 6.8
tomcat-8.0
jdk1.8
一、启动tomcat
#sh /root/tomcat-8.0/bin/startup.sh #tailf /root/tomcat-8.0/logs/catalina.out
26-aug-2017 12:58:31.661 info [main] org.apache.tomcat.util.net.nioselectorpool.getsharedselector using a shared selector for servlet write/read 26-aug-2017 12:58:31.662 info [main] org.apache.catalina.startup.catalina.load initialization processed in 680 ms 26-aug-2017 12:58:31.685 info [main] org.apache.catalina.core.standardservice.startinternal starting service catalina 26-aug-2017 12:58:31.685 info [main] org.apache.catalina.core.standardengine.startinternal starting servlet engine: apache tomcat/8.0.32 26-aug-2017 12:58:31.695 info [localhost-startstop-1] org.apache.catalina.startup.hostconfig.deploydirectory deploying web application directory /root/tomcat-8.0/webapps/root 26-aug-2017 12:58:36.184 info [localhost-startstop-1] org.apache.jasper.servlet.tldscanner.scanjars at least one jar was scanned for tlds yet contained no tlds. enable debug logging for this logger for a complete list of jars that were scanned but no tlds were found in them. skipping unneeded jars during scanning can improve startup time and jsp compilation time. 26-aug-2017 12:58:37.895 info [localhost-startstop-1] java.util.prefs.filesystempreferences$2.run created system preferences directory in java.home. 26-aug-2017 12:58:37.897 info [localhost-startstop-1] java.util.prefs.filesystempreferences$1.run created user preferences directory. 26-aug-2017 12:58:37.907 warning [localhost-startstop-1] java.util.prefs.filesystempreferences$6.run prefs file removed in background /root/.java/.userprefs/prefs.xml 26-aug-2017 12:58:37.908 warning [localhost-startstop-1] java.util.prefs.filesystempreferences$6.run prefs file removed in background /root/jdk-1.8/jre/.systemprefs/prefs.xml
等待tomcat启动的过程是煎熬的，足足5/6分钟，在不抱希望的情况下它居然又启动完成了......
有两种解决办法：
1）在tomcat环境中解决
在catalina.sh中加入这么一行：
-djava.security.egd=file:/dev/./urandom
例如：
java_opts="-server -xms2048m -xmx4096m -xx:permsize=256m -xx:maxpermsize=512m -djava.security.egd=file:/dev/./urandom"
2）在jvm环境中解决
修改$java_path/jre/lib/security/java.security
securerandom.source=file:/dev/urandom
替换成
securerandom.source=file:/dev/./urandom
总结
以上所述是小编给大家介绍的linux服务器tomact 8.0启动慢的完美解决方法，希望对大家有所帮助
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