休眠无法连接到纯MySQL安装Debian的

Question

我刚刚创建一个新的虚拟机，这是最初完全干净的 - 我已经安装了MySQL

，设置密码，现在我可以通过访问它PHPMyAdmin中。

我复制我的Java应用程序与我的另一台服务器上运行相同的配置。但它似乎有困难连接到MySQL服务器。

你可以看到MySQL是听：

# netstat -tap 
Active Internet connections (servers and established) 
Proto Recv-Q Send-Q Local Address   Foreign Address   State  PID/Program name 
tcp  0  0 localhost:mysql   *:*      LISTEN  5307/mysqld 

在TOP，我可以看到这两个过程：

5196 root  20 0 3956 632 508 S 0 0.0 0:00.00 mysqld_safe                                   
5307 mysql  20 0 167m 33m 6780 S 0 0.8 0:00.47 mysqld  

但是，一旦我尝试运行我结束了Hibernate试图当应用程序连接：

23:46:10,192 INFO org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl:127 - HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost/goout2?autoReconnect=true] 
23:46:10,192 INFO org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl:132 - HHH000046: Connection properties: {user=goout2, writedelay=0, password=****, autocommit=true, shutdown=true, characterEncoding=UTF-8, charSet=UTF-8, release_mode=auto} 
23:46:14,331 WARN org.hibernate.engine.jdbc.internal.JdbcServicesImpl:169 - HHH000342: Could not obtain connection to query metadata : Could not create connection to database server. Attempted reconnect 3 times. Giving up. 
23:46:14,340 INFO org.hibernate.dialect.Dialect:122 - HHH000400: Using dialect: org.hibernate.dialect.MySQL5InnoDBDialect 
23:46:14,350 INFO org.hibernate.engine.jdbc.internal.LobCreatorBuilder:85 - HHH000422: Disabling contextual LOB creation as connection was null 
23:46:14,362 INFO org.hibernate.engine.transaction.internal.TransactionFactoryInitiator:73 - HHH000268: Transaction strategy: org.hibernate.engine.transaction.internal.jdbc.JdbcTransactionFactory 
23:46:14,367 INFO org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory:48 - HHH000397: Using ASTQueryTranslatorFactory 
23:46:14,944 INFO org.hibernate.tool.hbm2ddl.SchemaUpdate:182 - HHH000228: Running hbm2ddl schema update 
23:46:14,944 INFO org.hibernate.tool.hbm2ddl.SchemaUpdate:193 - HHH000102: Fetching database metadata 
23:46:18,949 ERROR org.hibernate.tool.hbm2ddl.SchemaUpdate:201 - HHH000319: Could not get database metadata 
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up. 

随着C3P0死了是这样的：

23:58:08,696 INFO com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource:462 - Initializing c3p0 pool... com.mchange.v2.c3p0.PoolBackedDataSource@2e902532 [ connectionPoolDataSource -> com.mchange.v2.c3p0.WrapperConnectionPoolDataSource@43a8e988 [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, debugUnreturnedConnectionStackTraces -> false, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> ahkzhz8n1trd1gkc8ious|37e8cf51, idleConnectionTestPeriod -> 600, initialPoolSize -> 3, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 300, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 20, maxStatements -> 50, maxStatementsPerConnection -> 0, minPoolSize -> 5, nestedDataSource -> com.mchange.v2.c3p0.DriverManagerDataSource@78875ab8 [ description -> null, driverClass -> null, factoryClassLocation -> null, identityToken -> ahkzhz8n1trd1gkc8ious|20053644, jdbcUrl -> jdbc:mysql://localhost:5307/goout2?autoReconnect=true, properties -> {user=******, writedelay=0, password=******, autocommit=true, shutdown=true, characterEncoding=UTF-8, charSet=UTF-8, release_mode=auto} ], preferredTestQuery -> null, propertyCycle -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false; userOverrides: {} ], dataSourceName -> null, factoryClassLocation -> null, identityToken -> ahkzhz8n1trd1gkc8ious|347c8e1c, numHelperThreads -> 3 ] 
23:58:28,694 WARN com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector:608 - com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@457e133d -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks! 
23:58:28,697 WARN com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector:624 - com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@457e133d -- APPARENT DEADLOCK!!! Complete Status: 

显然，MySQL并不想接受来自我的Java应用程序的连接，MySQL日志不显示任何内容。我想，有一些我不知道的配置选项。

谢谢。

Answer 1

JDBC：MySQL的：//本地主机：5307/goout2 autoReconnect的=真

5307是不标准的MySQL端口？。你有没有尝试连接到端口3306？ 5307似乎是PID（进程ID）而不是端口。

您也可以尝试通过127.0.0.1和/或您当前的IP进行连接。屏幕看起来像你已经启用mysql来监听那个端口，但是确保它正在主动监听那个端口。 telnet localhost 5307 mysqlserver有一个选项只能监听本地套接字，确保其实际打开一个端口。