Jedis:无法从池中获取资源

时间:2014-04-23 02:19:52

标签: java redis jedis nosql

背景

我们的应用程序使用Jedis-2.2.1并连接到Redis-2.6,以下是我获取jedis资源的方法:

protected static JedisWrapper getRedisUserWrite(String UDID) {
        if (redisUserWritePools.get(0) == null) init();

        int hash = hash(UDID);
        Jedis jedis = redisUserWritePools.get(hash).getResource();
        jedis.select(dbs.get("redisUserWritePools" + hash));

        return new JedisWrapper(jedis, redisUserWritePools.get(hash));
    }

这是我的JedisWrapper(统一资源管理):

public class JedisWrapper {
    private Jedis jedis;
    private JedisPool pool;

    public JedisWrapper(Jedis jedis, JedisPool pool) {
        this.jedis = jedis;
        this.pool = pool;
    }

    public Jedis get(){
        return this.jedis;
    }

    public void returnResource() {
        if(null != this.jedis){
            this.pool.returnResource(this.jedis);
        }
    }

    public void returnBrokenResource() {
        if(null != this.jedis) {
            this.pool.returnBrokenResource(this.jedis);
        }
        this.jedis = null;
    }
}

JedisWrapper是Jedis实例的容器,这是我如何使用它:

private static void cacheSDKIDs(String UDID, String[] SDKIDs) {

        JedisWrapper wrapper = getRedisUserWrite(UDID);
        try {
            if (SDKIDs != null) {
                wrapper.get().del(UDID);
                wrapper.get().sadd(UDID, SDKIDs);
            }
        } catch (JedisConnectionException e) {
            e.printStackTrace();
            wrapper.returnBrokenResource();
        }catch (Exception e) {
            e.printStackTrace();
        } finally {
            wrapper.returnResource();
        }
    }

请注意,SKDIDs可能非常大(例如,最大可达8KB)。

这是问题

每次重新启动应用程序时,所有redis连接都是正常的,但是几个小时  之后,出现了Could not get a resource from the pool异常。并且频率越来越高,然后与Redis的所有连接都断开连接并且可以创建新的连接。

这是我的配置:

<bean id = "redisConfig" class="redis.clients.jedis.JedisPoolConfig">
    <property name="maxActive"  value="400" />
    <property name="maxIdle" value="100" />
    <property name="minIdle" value="20" />
    <property name="maxWait" value="4000" />
    <property name="testOnBorrow"  value="true"/>
    <property name="testOnReturn" value="true" />
  </bean>

异常Stacktrace:

Caused by: redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
    at redis.clients.util.Pool.getResource(Pool.java:40)
    at com.xxxice.redis.BaseRedis.getRedisUserWrite(BaseRedis.java:158)
    at com.xxx.service.redis.DeviceRedis.cacheSDKIds(DeviceRedis.java:128)
    at com.xxx.redis.DeviceRedis.cacheDevice(DeviceRedis.java:65)
    at com.xxx.service.DeviceService.update(DeviceService.java:88)
    at com.xxx.controller.Devices.update(Devices.java:25)
    ... 32 more
Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
    at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1174)
    at redis.clients.util.Pool.getResource(Pool.java:38)
    ... 37 more

2 个答案:

答案 0 :(得分:0)

在JedisWrapper中,Jedis被创建为一个类变量,它实例化一次。请在方法getJedis中声明它,然后问题就解决了

答案 1 :(得分:0)

检查您是否有权通过代码访问redis

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