今天測試，發(fā)現(xiàn)redis使用的時候，調(diào)用的鏈接一直不釋放。后查閱蠻多資料，才發(fā)現(xiàn)一個配置導(dǎo)致的。并不是他們說的服務(wù)沒有啟動導(dǎo)致的。

1)配置文件

#redis連接配置===================start=========================# Redis settings

redis.host=192.168.10.102redis.port=6379redis.pass=redis.maxIdle=1redis.maxActive=9redis.maxWait=1000redis.testOnBorrow=true#redis連接配置===================end=========================

2)測試?yán)?/p>

寫了一個springmvc的controller類，然后調(diào)用線程使用連接，出現(xiàn)問題。

DemoMvcController.java

packagecom.iafclub.demo.web.controller;importjavax.servlet.http.HttpServletRequest;importorg.springframework.beans.factory.annotation.Autowired;importorg.springframework.data.redis.core.StringRedisTemplate;importorg.springframework.stereotype.Controller;importorg.springframework.ui.Model;importorg.springframework.web.bind.annotation.RequestMapping;importcom.iafclub.baseTools.util.MyDateUtil;

@Controllerpublic classDemoMvcController {

@AutowiredprivateStringRedisTemplate stringRedisTemplate;/*** 跳轉(zhuǎn)方式3

**/@RequestMapping("/testRedis.do")public voidtestRedis(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= newRedisThread(stringRedisTemplate);

thread.setName("線程：" +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線程類

packagecom.iafclub.demo.web.controller;importorg.junit.runner.RunWith;importorg.springframework.data.redis.core.BoundValueOperations;importorg.springframework.data.redis.core.StringRedisTemplate;importorg.springframework.test.context.junit4.SpringJUnit4ClassRunner;importcom.iafclub.baseTools.util.MyDateUtil;

@RunWith(SpringJUnit4ClassRunner.class)public class RedisThread extendsThread {privateStringRedisTemplate redisTemplate;private String REVERSE_KEY = "batchJob:task_";publicRedisThread(StringRedisTemplate redisTemplate){this.redisTemplate =redisTemplate;

}

@Overridepublic voidrun() {//其實這里使用了多次，但是使用的也都是一個鏈接

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");

}

}

出現(xiàn)問題異常：Cannot get Jedis connection

Exception in thread "線程：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)

...3more

Caused by: java.util.NoSuchElementException: Timeout waitingforidle 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)查看鏈接數(shù)

通過客戶端工具到服務(wù)器去查詢當(dāng)前連接數(shù):當(dāng)前10個

[root@dev2 bin]# ./redis-cli info clients

# Clients

connected_clients:10client_longest_output_list:0client_biggest_input_buf:0blocked_clients:0

4)分析問題

因為我們設(shè)置最初的連接數(shù)最大是9個，加上我自己通過客戶端訪問連接數(shù)10個，理論上應(yīng)該釋放才對，這里沒有釋放，是有問題的。因為這個鏈接應(yīng)該是與數(shù)據(jù)庫鏈接一樣，會釋放，才能長久。。。

間隔很久訪問，依舊是10個。沒有釋放。一旦有httprequest請求發(fā)出來，錯誤依舊是：沒有取到鏈接。

Exception in thread "線程：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

經(jīng)過反復(fù)查找屬性，最終在配置文件中發(fā)現(xiàn)一個配置，是事務(wù)處理的，網(wǎng)上查詢得知，如果啟動了redis中的事務(wù)管理，必須使用mul和execute執(zhí)行后才能生效。而我們這里沒有使用這個事務(wù)。so去掉這個配置。

6)重新測試

重新部署，啟動，多次刷新后連接數(shù)都沒有出現(xiàn)無法獲取的異常，很正常。

# Clients

connected_clients:1client_longest_output_list:0client_biggest_input_buf:0blocked_clients:0

7)問題解決

總結(jié)：這個配置項，需要注意。。

總結(jié)

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