redis中Could not get a resource from the pool异常及解决方案_数据库_开发者

描述

这个错误产生的前提是这样的，将数据存入Redis（新安装的）中，在通过连接池获取jedis实例时，产生如下错误（ Could not get a resource from the pool）。

分析

由于是新安装的redis，配置文件没有更改，低级的错误浪费不少时间，写一篇文章，让同样犯这种错误的朋友别再浪费时间。

解决

更改配置文件 redis.conf 中两处

1.将 bind 127.0.0.1 注释掉

2.将 protected-mode 改为 no

bind 127.0.0.1	protected-mode
默认情况bind=127.0.0.1只能接受本机的访问请求不写的情况下，无限制接受任何ip地址的访问	如果开启了protected-mode，那么在没有设定bind ip且没有设密码的情况下，Redis只允许接受本机的相应

redis中Could not get a resource from the pool异常及解决方案

运行代码

//创建jedis配置文件对象
val jedisPoolConfig = new JedisPoolConfig()
//添加配置信息
jedisPoolConfig.setMaxTotal(100)
jedisPoolConfig.setMaxIdle(20)
jedisPoolConfig.setMinIdle(0)
jedisPoolConfig.setblockWhenExhausted(true)
jedisPoolConfig.setMaxWaitMillis(500)
jedisPoolConfig.setTestOnBorrow(true)
//创建连接池对象
var jedisPool：JedisPool = new JedisPool(jedisPoolConfig,"linux1",6379)
//获取实例
jedisPool.getResource

报错内容

ERROR --- [ Executor task launch worker for task 15] org.apache.spark.executor.Executor (line: 91) : Exception in task 7.0 in stage 2.0 (TID 15)
redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
   at redis.clients.util.Pool.getResource(Pool.Java:53)
&开发者_DB2nbsp; at redis.clients.jedis.JedisPool.getResource(JedisPool.java:226)
   at com.atguigu.bigdata.sparkmall.common.RedisUtil$.getJedisClient(RedisUtil.Scala:26)
   at com.atguigu.bigdata.sparkmall.realtime.Req7TimeAdvertClickTrendApplication$$anonfun$main$1$$anonfun$apply$2.apply(Req7TimeAdvertClickTrendApplication.scala:54)
   at com.atguigu.bigdata.sparkmall.realtime.Req7TimeAdvertClickTrendApplication$$anonfun$main$1$$anonfun$ap编程客栈ply$2.apply(Req7TimeAdvertClickTrendApplication.scala:53)
   at org.apache.spark.rdd.RDD$$anonfun$foreachPartition$1$$anonfun$apply$29.apply(RDD.scala:926)
   at org.apache.spark.rdd.RDD$$anonfun$foreachPartition$1$$anonfun$apply$29.apply(RDD.scala:926)
   at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1951)
   at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1951)
   at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87)
   at org.apache.spark.scheduler.Task.run(Task.scala:99)
   at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:322)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   at java.lang.Thread.run(Thread.java:748)
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused: connect
   at redis.clients.jedis.Connection.connect(Connection.java:207)
   at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:93)
   at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1767)
   at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:106)
   at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:868)
   at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:435)
   at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:363)
   at redis.clients.util.Pool.getResource(Pool.java:49)
   ... 14 more
Causjavascripted by: java.net.ConneandroidctException: Connection refused: connect
   at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
   at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
   at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketIphpmpl.java:350)
   at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
   at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
   at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
   at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
   at java.net.Socket.connect(Socket.java:589)
   at redis.clients.jedis.Connection.connect(Connection.java:184)
  js; ... 21 more