tomcat 启动慢 Creation of SecureRandom instance for session ID generation using [SHA1PRNG]took [xx] mil

http://blog.csdn.net/u011627980/article/details/54024974

http://www.cnblogs.com/t-road/p/6861882.html

# vim /usr/local/tomcat/bin/catalina.sh
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JAVA_OPTS="-Djava.security.egd=file:/dev/./urandom"
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10.29注释：

即使没有在log中显示xxxxxxs，仅访问慢，也可考虑此法，验证成功。

10.30

tomcat启动日志直接阻塞，也是此法