不能获取Redis连接池实例

Question

Could not get a resource from the pool

意思就是不能获取Redis连接池实例

redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
at redis.clients.util.Pool.getResource(Pool.java:53)
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$apply$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)

Answer 1

查看是否是linux防火墙未开通访问权限：

首先公司需要申请的权限有两个：

分别是redis实例地址和哨兵。那么可以：

ping ip
telnet ip port
1
2
看这两个是否都通。

在项目中就是因为没有申请权限导致。

redis的实例名称和哨兵地址不对

这个是因为地址写错导致的。

每次使用后没有关闭连接

代码中没有finally中关闭连接池，导致连接池一直被占用，别的不能正常使用。

连接的太多，导致连接不上

连接数太多导致连接问题