Redis一个异常的解决办法,异常描述:Could not get a resource from the pool
2012-04-14 12:13
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异常描述:
1、产生原因:客户端去redis服务器拿连接(代码描述的是租用对象borrowObject)的时候,池中无可用连接,即池中所有连接被占用,且在等待时候设定的超时时间后还没拿到时,报出此异常。
2、解决办法:调整JedisPoolConfig中maxActive为适合自己系统的阀值。
<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>
3、重现:
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) ... 2 more
1、产生原因:客户端去redis服务器拿连接(代码描述的是租用对象borrowObject)的时候,池中无可用连接,即池中所有连接被占用,且在等待时候设定的超时时间后还没拿到时,报出此异常。
2、解决办法:调整JedisPoolConfig中maxActive为适合自己系统的阀值。
<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>
3、重现:
public class BorrowObject implements Runnable { private ShardedJedisPool jedisPool; public BorrowObject(ShardedJedisPool jedisPool) { this.jedisPool = jedisPool; } @Override public void run() { ShardedJedis shardedJedis = null; try { shardedJedis = jedisPool.getResource(); String value = shardedJedis.hget("LONG_KEY_TEST:AA059E03E0AB7D806E6C351F87404B06C1190", "Roc El Pinar Aparthotel"); System.out.println(value); } catch (Exception e) { //logger.error(e); e.printStackTrace(); } finally { jedisPool.returnResource(shardedJedis); } } }
public class BorrowObjectTest { private ShardedJedisPool jedisPool = null; public BorrowObjectTest() { List<JedisShardInfo> jedisShardInfos = new ArrayList<JedisShardInfo>(); JedisShardInfo jedisShardInfo = new JedisShardInfo("192.168.1.112"); jedisShardInfo.setTimeout(1000000); jedisShardInfos.add(jedisShardInfo); jedisPool = new ShardedJedisPool(createJedisConfig(), jedisShardInfos); } private JedisPoolConfig createJedisConfig() { JedisPoolConfig jedisConfig = new JedisPoolConfig(); jedisConfig.setMaxActive(2); jedisConfig.setMaxIdle(2); jedisConfig.setMaxWait(5); jedisConfig.setTestOnBorrow(true); return jedisConfig; } public static void main(String[] args) { BorrowObjectTest borrowObjectTest = new BorrowObjectTest(); for (int i = 0; i < 300; i++) { new Thread(new BorrowObject(borrowObjectTest.jedisPool)).start(); } } }
转载自:http://www.iteye.com/topic/1122212
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