最近在写一个shiro 的demo用到Ehcache缓存配置。结果在启动项目的时候出错。
Caused by: net.sf.ehcache.CacheException: Another CacheManager with same name 'es' already exists in the same VM. Please provide unique names for each CacheManager in the config or do one of following:
1. Use one of the CacheManager.create() static factory methods to reuse same CacheManager with same name or create one if necessary
2. Shutdown the earlier cacheManager before creating new one with same name.
[net.sf.ehcache.util.UpdateChecker] - New update(s) found: 2.6.5 [http://www.terracotta.org/confluence/display/release/Release+Notes+Ehcache+Core+2.6]. Please check http://ehcache.org for the latest version.
是版本的问题，因为
ehcache在2.5以后，CacheManager使用了Singleton，这样在创建多个CacheManager时就会产生上述错误。
http://ehcache.org/documentation/get-started/concepts 是官方解释。
解决：
导入ehcache-core-2.4.8.jar包
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache-core</artifactId>
<version>2.4.8</version>
</dependency>
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