Could not get a resource from the pool

異常描述： 

1.  
   redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
2.  
   at redis.clients.util.Pool.getResource(Pool.java: 22)
3.  
   at com.derbysoft.jredis.longkeytest.BorrowObject.run(BorrowObject.java: 22)
4.  
   at java.lang.Thread.run(Thread.java: 662)
5.  
   Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
6.  
   at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java: 1134)
7.  
   at redis.clients.util.Pool.getResource(Pool.java: 20)
8.  
   ... 2 more

一、產生緣由：客戶端去redis服務器拿鏈接（代碼描述的是租用對象borrowObject）的時候，池中無可用鏈接，即池中全部鏈接被佔用，且在等待時候設定的超時時間後還沒拿到時，報出此異常。 

二、解決辦法：調整JedisPoolConfig中maxActive爲適合本身系統的閥值。 

<bean id="dataJedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig"> 
        <property name="maxActive" value="300"/> 
       <property name="maxIdle" value="100"/> 
        <property name="maxWait" value="10000"/> 
        <property name="testOnBorrow" value="true"/> 
</bean>