Question

我在播放Play！中的AS400数据库时遇到问题。

我的application.conf看起来像是：

db.default.driver="com.ibm.as400.access.AS400JDBCDriver"
db.default.url="jdbc:as400://SERVER;libraries=A,B,C;toolbox trace=all;trace=true"
db.default.username="user"
db.default.password="password"

我在类路径中设置了jt400，我可以看到＆＃34;外部库＆＃34;它出现并且可用。但基本上我收到一条错误消息，指出无法连接（我知道工作的用户/密码）和execute isValid()失败，这是AS400JDBCConnection类中无法找到的函数。

[error] c.z.h.p.PoolBase - HikariPool-1 - Failed to execute isValid() for connection, configure connection test query. (com.ibm.as400.access.AS400JDBCConnection.isValid(I)Z)
[error] application - 

! @72265nf0a - 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$1: Configuration error[Failed to initialize pool: com.ibm.as400.access.AS400JDBCConnection.isValid(I)Z]
    at play.api.Configuration$.configError(Configuration.scala:154)
    at play.api.PlayConfig.reportError(Configuration.scala:996)
    at play.api.db.HikariCPConnectionPool.create(HikariCPModule.scala:70)
    at play.api.db.PooledDatabase.createDataSource(Databases.scala:199)
    at play.api.db.DefaultDatabase.dataSource$lzycompute(Databases.scala:123)
    at play.api.db.DefaultDatabase.dataSource(Databases.scala:121)
    at play.api.db.DefaultDatabase.getConnection(Databases.scala:142)
    at play.api.db.DefaultDatabase.getConnection(Databases.scala:138)
    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: Failed to initialize pool: com.ibm.as400.access.AS400JDBCConnection.isValid(I)Z
    at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:512)
    at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:105)
    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:199)
    at play.api.db.DefaultDatabase.dataSource$lzycompute(Databases.scala:123)
    at play.api.db.DefaultDatabase.dataSource(Databases.scala:121)
Caused by: java.lang.AbstractMethodError: com.ibm.as400.access.AS400JDBCConnection.isValid(I)Z
    at com.zaxxer.hikari.pool.PoolBase.checkDriverSupport(PoolBase.java:400)
    at com.zaxxer.hikari.pool.PoolBase.setupConnection(PoolBase.java:375)
    at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:346)
    at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:506)
    at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:105)
    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)

我可以使用以下内容连接其他基于java的项目：

try {
                Class.forName("com.ibm.as400.access.AS400JDBCDriver");
                Connection con = DriverManager.getConnection("jdbc:as400://" + 
                    ApplicationAuthentication.server + "/" + 
                    ApplicationAuthentication.library, 
                    ApplicationAuthentication.user, 
                    ApplicationAuthentication.password
                );
            } catch (Exception e) {
                System.err.println(e);
                throw new WebApplicationException(genericError, Response.Status.UNAUTHORIZED);
            }

Answer 1

从堆栈跟踪中猜测，从您的驱动程序返回的连接似乎与连接Hikari Connection Pool的效果不佳。 Hikari是default connection pool in playframework。

具体来说，您的异常跟踪显示Hikari CP正在尝试在JDBC驱动程序返回的连接对象上调用isValid方法，然后使用java.lang.AbstractMethodError失败。

您可以尝试切换到BoneCP连接池，看看它是否有帮助。您还可以在hikari github问题列表

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在Play Framework上连接到as400 JDBC

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