Maven编译和运行时错误java.lang.AbstractMethodError:Tomcat 8 Server上的oracle.jdbc.driver.T4CConnection.isValid(I)Z [英] Maven compilation and run time error java.lang.AbstractMethodError: oracle.jdbc.driver.T4CConnection.isValid(I)Z on Tomcat 8 Server

问题描述

我一直在将大型Java Web App转换为maven项目，但是在少数来自tomcat-dbcp jar的类中遇到了错误.我从需要使用BasicDataSource对象的任何类中获得以下错误消息:

I've been converting a large Java Web App to a maven project, but I've run into an error in a handful of classes originating from the tomcat-dbcp jar. I get the following error messages from any class that needs to use BasicDataSource objects:

javax.servlet.ServletException: java.lang.AbstractMethodError: oracle.jdbc.driver.T4CConnection.isValid(I)Z
java.lang.AbstractMethodError: oracle.jdbc.driver.T4CConnection.isValid(I)Z

现在我知道服务器上存在该jar(因为在我们的Tomcat8安装中它是默认的).因此，在Maven中，我这样声明了这种依赖关系:

Now I know this jar is present on the server (as it is default in our Tomcat8 installation). So in maven I declared this dependency as such:

<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-dbcp</artifactId>
    <version>8.0.26</version>
    <scope>provided</scope>
</dependency>

但是我仍然看到此错误.我该怎么办才能消除此错误?

But I'm still seeing this error. What can I do to eliminate this error?

推荐答案

尽管我不知道为什么，但此错误确实消失了. pom条目仍然相同，并且仍在Tomcat 8上运行.我们确实找到了一个hacky临时修复程序:

This error did go away, though I have no idea why. The pom entry is still the same and still running on Tomcat 8. We did find a hacky temporary fix:

<dependency>
    <groupId>com.oracle</groupId>
    <artifactId>ojdbc7</artifactId>
    <version>12.1.0.1</version>
    <scope>system</scope>
    <systemPath>${basedir}/lib/ojdbc7-12.1.0.1.jar</systemPath>
</dependency>

但是我们在某个时候恢复了，一切正常.

But we reverted back at some point and it is working fine.

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