今天在使用Spring Data Redis时,出现以下错误: 

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:198)

at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.getConnection(JedisConnectionFactory.java:345)

at org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection(RedisConnectionUtils.java:128)

at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:91)

at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:78)

at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:189)

at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:164)

at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:88)

at org.springframework.data.redis.core.DefaultValueOperations.set(DefaultValueOperations.java:169)

at org.springframework.data.redis.core.DefaultBoundValueOperations.set(DefaultBoundValueOperations.java:69)

at com.pinyougou.springdataredis.demo.TestValue.setValue(TestValue.java:22)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)

at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)

at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)

at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)

at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)

at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254)

at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)

at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)

at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)

at org.junit.runners.ParentRunner.run(ParentRunner.java:292)

at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)

Caused by: 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:99)

at redis.clients.jedis.JedisPool.getResource(JedisPool.java:12)

at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:191)

... 39 more

Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.UnknownHostException: 127.0.0.1

at redis.clients.jedis.Connection.connect(Connection.java:164)

at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:80)

at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1677)

at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:87)

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)

... 42 more

Caused by: java.net.UnknownHostException: 127.0.0.1

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)

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:158)

... 49 more

大概是说无法从连接到 Jedis , 无法从连接池中获取连接 , 所以我们根据异常的 Caused by: java.net.UnknownHostException: 127.0.0.1 找到问题的根源 , 所以我们对redis-config.properties文件进行检查。检查发现配置数据都没有问题 , 但仍然在报错 , 最后找了好长时间竟然发现是:

大家在写这种连接配置文件的时候一定要注意空格问题 , 特别是copy的情况那更难找了.....今天吃了个大亏 , 长个记性!!!