redis运用连接池报错解决

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

ShardedJedis jedis = shardedJedisPool.getResource();
try {
    jedis.set(key, value);
} finally {
    shardedJedisPool.returnResource(jedis);
}