今天测试，发现redis使用的时候，调用的链接一直不释放。后查阅蛮多资料，才发现一个配置导致的。并不是他们说的服务没有启动导致的。
1）配置文件
#redis连接配置===================start=========================
# Redis settings
redis.host=192.168.10.102
redis.port=6379
redis.pass=
redis.maxIdle=1
redis.maxActive=9
redis.maxWait=1000
redis.testOnBorrow=true
#redis连接配置===================end=========================
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
class="redis.clients.jedis.JedisPoolConfig">
class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>
class="org.springframework.data.redis.core.StringRedisTemplate">
class="org.springframework.data.redis.core.RedisTemplate">
2）测试例子
写了一个springmvc的controller类，然后调用线程使用连接，出现问题。
DemoMvcController.java
package com.iafclub.demo.web.controller;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import com.iafclub.baseTools.util.MyDateUtil;
@Controller
public class DemoMvcController {
@Autowired
private StringRedisTemplate stringRedisTemplate;
/**
* 跳转方式3
* */
@RequestMapping("/testRedis.do")
public void testRedis(Model model, HttpServletRequest request){
System.out.println("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
for(int i=0;i<5;i++){
Thread thread = new RedisThread(stringRedisTemplate);
thread.setName("线程：" + i);
thread.start();
}
model.addAttribute("status", "完成"+MyDateUtil.getCurrentDateTimeStr());
System.out.println("完成");
System.out.println("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
}
}
RedisThread.java线程类
package com.iafclub.demo.web.controller;
import org.junit.runner.RunWith;
import org.springframework.data.redis.core.BoundValueOperations;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.iafclub.baseTools.util.MyDateUtil;
@RunWith(SpringJUnit4ClassRunner.class)
public class RedisThread extends Thread {
private StringRedisTemplate redisTemplate;
private String REVERSE_KEY = "batchJob:task_";
public RedisThread(StringRedisTemplate redisTemplate){
this.redisTemplate = redisTemplate;
}
@Override
public void run() {
// 其实这里使用了多次，但是使用的也都是一个链接
for(int i=0;i<50;i++){
String value = Thread.currentThread().getName() + "{user:user"+MyDateUtil.getCurrentDateTimeStr()+";name:chenweixian"+System.currentTimeMillis()+"}";
redisTemplate.opsForValue().set(REVERSE_KEY+System.currentTimeMillis(), value);
redisTemplate.getConnectionFactory().getConnection().close();
// BoundValueOperations opt = redisTemplate.boundValueOps(REVERSE_KEY+System.currentTimeMillis());
// opt.set(value);
// System.out.println(opt.get());
}
System.out.println("完成");
}
}
启动应用，访问链接：http://chenweixian-pc:8480/demo-system/testRedis.do，多刷新几次
出现问题异常：Cannot get Jedis connection
Exception in thread "线程：3" org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:162)
at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.getConnection(JedisConnectionFactory.java:251)
at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.getConnection(JedisConnectionFactory.java:58)
at com.iafclub.demo.web.controller.RedisThread.run(RedisThread.java:26)
Caused by: 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:88)
at redis.clients.jedis.JedisPool.getResource(JedisPool.java:12)
at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:155)
... 3 more
Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:442)
at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:360)
at redis.clients.util.Pool.getResource(Pool.java:48)
... 6 more
3）查看链接数
通过客户端工具到服务器去查询当前连接数:当前10个
[root@dev2 bin]# ./redis-cli info clients
# Clients
connected_clients:10
client_longest_output_list:0
client_biggest_input_buf:0
blocked_clients:0
4）分析问题
因为我们设置最初的连接数最大是9个，加上我自己通过客户端访问连接数10个，理论上应该释放才对，这里没有释放，是有问题的。因为这个链接应该是与数据库链接一样，会释放，才能长久。。。
间隔很久访问，依旧是10个。没有释放。一旦有httprequest请求发出来，错误依旧是：没有取到链接。
Exception in thread "线程：3" org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
5）修改配置
经过反复查找属性，最终在配置文件中发现一个配置，是事务处理的，网上查询得知，如果启动了redis中的事务管理，必须使用mul和execute执行后才能生效。而我们这里没有使用这个事务。so去掉这个配置。
class="org.springframework.data.redis.core.StringRedisTemplate">
6）重新测试
重新部署，启动，多次刷新后连接数都没有出现无法获取的异常，很正常。
# Clients
connected_clients:1
client_longest_output_list:0
client_biggest_input_buf:0
blocked_clients:0
7)问题解决
总结：这个配置项，需要注意。。
redis在应用中使用连接不释放问题解决
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