我有一个简单的Java Play！框架2.5项目。我想将它连接到AWS RDS中的Oracle DB 11g。我已将Oracle DB连接器放在/lib目录中（即“ojdbc6.jar”，找到here）。我还配置了Ebean和Evolutions插件。
当我在我的浏览器上执行activator run并加载“localhost：9000”时，此消息将显示在控制台上：
[info] application - Creating Pool for datasource 'default'
[warn] c.z.h.u.DriverDataSource - Registered driver with driverClassName=oracle.jdbc.driver.OracleDriver was not found, trying direct instantiation.
[info] application - Creating Pool for datasource 'default'
[warn] c.z.h.u.DriverDataSource - Registered driver with driverClassName=oracle.jdbc.driver.OracleDriver was not found, trying direct instantiation.
接下来是演变页面，在接受演变后出现错误。这是堆栈跟踪：
[error] application -
! @701gfbl3i - Internal server error, for (GET) [/] ->
play.api.Configuration$$anon$1: Configuration error[Cannot connect to database [default]]
at play.api.Configuration$.configError(Configuration.scala:154)
at play.api.Configuration.reportError(Configuration.scala:806)
at play.api.db.DefaultDBApi$$anonfun$connect$1.apply(DefaultDBApi.scala:48)
at play.api.db.DefaultDBApi$$anonfun$connect$1.apply(DefaultDBApi.scala:42)
at scala.collection.immutable.List.foreach(List.scala:381)
at play.api.db.DefaultDBApi.connect(DefaultDBApi.scala:42)
at play.api.db.DBApiProvider.get$lzycompute(DBModule.scala:72)
at play.api.db.DBApiProvider.get(DBModule.scala:62)
at play.api.db.DBApiProvider.get(DBModule.scala:58)
at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:81)
Caused by: play.api.Configuration$$anon$1: Configuration error[Exception during pool initialization: HikariPool-0 - Connection is not available, request timed out after 30000ms.]
at play.api.Configuration$.configError(Configuration.scala:154)
at play.api.PlayConfig.reportError(Configuration.scala:996)
at play.api.db.HikariCPConnectionPool.create(HikariCPModule.scala:69)
at play.api.db.PooledDatabase.createDataSource(Databases.scala:200)
at play.api.db.DefaultDatabase.dataSource$lzycompute(Databases.scala:124)
at play.api.db.DefaultDatabase.dataSource(Databases.scala:122)
at play.api.db.DefaultDatabase.getConnection(Databases.scala:143)
at play.api.db.DefaultDatabase.getConnection(Databases.scala:139)
at play.api.db.DefaultDBApi$$anonfun$connect$1.apply(DefaultDBApi.scala:44)
at play.api.db.DefaultDBApi$$anonfun$connect$1.apply(DefaultDBApi.scala:42)
Caused by: com.zaxxer.hikari.pool.HikariPool$PoolInitializationException: Exception during pool initialization: HikariPool-0 - Connection is not available, request timed out after 30000ms.
at com.zaxxer.hikari.pool.HikariPool.initializeConnections(HikariPool.java:526)
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:136)
at com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:71)
at play.api.db.HikariCPConnectionPool$$anonfun$1.apply(HikariCPModule.scala:58)
at play.api.db.HikariCPConnectionPool$$anonfun$1.apply(HikariCPModule.scala:54)
at scala.util.Try$.apply(Try.scala:192)
at play.api.db.HikariCPConnectionPool.create(HikariCPModule.scala:54)
at play.api.db.PooledDatabase.createDataSource(Databases.scala:200)
at play.api.db.DefaultDatabase.dataSource$lzycompute(Databases.scala:124)
at play.api.db.DefaultDatabase.dataSource(Databases.scala:122)
Caused by: java.sql.SQLTransientConnectionException: HikariPool-0 - Connection is not available, request timed out after 30000ms.
at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:195)
at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:147)
at com.zaxxer.hikari.pool.HikariPool.initializeConnections(HikariPool.java:510)
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:136)
at com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:71)
at play.api.db.HikariCPConnectionPool$$anonfun$1.apply(HikariCPModule.scala:58)
at play.api.db.HikariCPConnectionPool$$anonfun$1.apply(HikariCPModule.scala:54)
at scala.util.Try$.apply(Try.scala:192)
at play.api.db.HikariCPConnectionPool.create(HikariCPModule.scala:54)
at play.api.db.PooledDatabase.createDataSource(Databases.scala:200)
Caused by: java.sql.SQLRecoverableException: IO Error: Got minus one from a read call
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:489)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:553)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:254)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:528)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:95)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:101)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:314)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:171)
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:436)
Caused by: oracle.net.ns.NetException: Got minus one from a read call
at oracle.net.ns.Packet.receive(Packet.java:311)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:300)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1140)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:340)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:553)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:254)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:528)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:95)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:101)
浏览器显示：
Cannot connect to database [default]
我不知道发生了什么事。好像是Play！没有识别给定的连接器，但我只是按照维基。
我有同样的问题，使用ojdbc6.jar和Oracle Db 11g，但使用Play 2.7.x并在“[warn] czhuDriverDataSource - 找不到driverClassName = oracle.jdbc.driver.OracleDriver的注册驱动程序后，尝试直接实例化“该应用程序仍然能够连接到数据库。
无论如何，我通过更改OracleDriver类路径（显然它是错误的）来摆脱警告：在application.conf中，我设置“db.default.driver = oracle.jdbc.OracleDriver”而不是“db.default.driver = oracle.jdbc.driver.OracleDriver”。这应该足以删除警告，但我不确定这是否会解决您特定情况下的后续错误