问题：

Jul 21, 2016 2:43:49 PM org.apache.catalina.util.SessionIdGeneratorBase createSecureRandom
INFO: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [97,238] milliseconds.

 

解决：

调整jvm 参数

 

参考：

http://blog.csdn.net/chszs/article/details/49494701