JFinal Weixin 已经设置了RedisPlugin，获取值时提示Cou?报错

@JFinal 你好，
我在使用JFinal Weixin时，已经在代码中声明RedisPlugin，如下

public void configPlugin(Plugins me) { // 配置C3p0数据库连接池插件 C3p0Plugin c3p0Plugin = new C3p0Plugin(PropKit.get("jdbcUrl"), PropKit.get("user"), PropKit.get("password").trim()); me.add(c3p0Plugin);

//设置Redis缓存 RedisPlugin redis = new RedisPlugin("weixin", "localhost"); redis.start(); //me.add(redis);//添加该语句，会使cache对象为空 ApiConfigKit.setAccessTokenCache(new RedisAccessTokenCache()); }

public static AccessToken getAccessToken() {
String appId = ApiConfigKit.getApiConfig().getAppId();
AccessToken result = null;
try {
result = accessTokenCache.get(appId);
} finally {
if (result != null && result.isAvailable())
return result;

refreshAccessToken();
return accessTokenCache.get(appId);
}
}

accessTokenCache不为空，如图。

但获取不到值，在refreshAccessToken方法中也写不了值，直接报错，提示“Could not get a resource from the pool?”?

redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
at redis.clients.util.Pool.getResource(Pool.java:50)
at redis.clients.jedis.JedisPool.getResource(JedisPool.java:86)
at com.jfinal.plugin.redis.Cache.getJedis(Cache.java:1202)
at com.jfinal.plugin.redis.Cache.setex(Cache.java:72)
at com.jfinal.weixin.sdk.cache.RedisAccessTokenCache.set(RedisAccessTokenCache.java:19)
at com.jfinal.weixin.sdk.api.AccessTokenApi.refreshAccessToken(AccessTokenApi.java:73)
at com.jfinal.weixin.sdk.api.AccessTokenApi.getAccessToken(AccessTokenApi.java:49)
at com.jfinal.weixin.sdk.api.JsTicketApi.getTicket(JsTicketApi.java:47)