JDK 8 + tomcat8 启动有时会出现 org.apache.catalina.util.SessionIdGeneratorBase- Creation of SecureRandom instance for session ID generation using [SHA1PRNG] ...

1.用vim编辑器打开tomcat的bin目录下的Catalina.sh2.增加一行：JAVA_OPTS="-Djava.security.egd=file:/dev/./urandom"3.重启tomcat，速度即可得到大幅度提升。...