java.lang.RuntimeException: java.io.IOException: java.lang.RuntimeException: class not found CLASSNAME: loader:WebappClassLoader

  context: ROOT

  delegate: false

----------> Parent Classloader:

java.net.URLClassLoader@7276c8cd

at com.jfinal.plugin.redis.serializer.FstSerializer.valueFromBytes(FstSerializer.java:78)

at com.jfinal.plugin.redis.Cache.valueFromBytes(Cache.java:1195)

at com.jfinal.plugin.redis.Cache.get(Cache.java:91)

突然报这个错，百度了半天也没找到解决的办法，希望有人能指点一下，很急