无法从池中获取资源（SocketTimeoutExctive：）

Question

我正在运行多个工作线程（大约10个）来访问redis Q的数据。
我正在使用infinte timeout For Jedis客户端。

Jedis jedis = pool.getResource();
jedis.getClient().setTimeoutInfinite();  

但我仍然收到错误“无法从池中获取资源”。stacktrace如下所示。

redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
at redis.clients.util.Pool.getResource(Pool.java:22)
at Workers.Worker1.met1(Worker1.java:124)
at Workers.Worker1.work(Worker1.java:108)
at org.gearman.impl.worker.WorkerConnectionController$3.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)  

Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: connect timed out
at redis.clients.jedis.Connection.connect(Connection.java:124)
at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:54)
at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1657)
at redis.clients.jedis.JedisPool$JedisFactory.makeObject(JedisPool.java:63)
at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1188)
at redis.clients.util.Pool.getResource(Pool.java:20)
... 6 more  

Caused by: java.net.SocketTimeoutException: connect timed out
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at redis.clients.jedis.Connection.connect(Connection.java:119)
... 11 more

Answer 1

这是经常发生还是偶尔发生？如果是偶然的，您可能需要检查连接池的大小。

如果使用的是config，则默认连接池大小为8。这对你的案子来说可能太小了。

JedisPoolConfig poolConfig = new JedisPoolConfig();
poolConfig.setMaxTotal(128);
jedisPool = new JedisPool(poolConfig, HOST, PORT, ...);

Answer 2

根据Rick Hanlon的回答，如果在Spring Boot中使用Redis，也会引发此异常。

如果你使用的是Spring Boot，仅仅依赖Redis是不够的；您还需要从Redis手动下载并在您的机器上安装Redis。io，然后在Bash终端上运行它：

me@my_pc:/path/to/redis/dir$ ./src/redis-server ./redis.conf

运行服务器后，您需要在所有使用Redis的应用程序中添加相关行：

应用程序。属性：

...
spring.redis.host: <yourhost> // usually localhost, but can also be on a LAN
spring.redis.port: <yourport> // usually 6379, but settable in redis.conf

应用程序。yml：

...
spring:
  redis:
    host: <yourhost> // usually localhost, but can also be on a LAN
    port: <yourport> // usually 6379, but settable in redis.conf

Answer 3

我注意到，如果Redis没有运行，这个异常可以也将被抛出。只是提醒一下。