Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/JDBC_DBO]]

You are missing commons-digester3-3.2.jar from Apache Commons Digester. If you are using Maven you can add: <dependency> <groupId>commons-digester</groupId> <artifactId>commons-digester</artifactId> <version>2.1</version> </dependency> to your project dependencies. Update: The jar from the latest download page has a slightly different package structure to what your application expects. You can use this older jar instead.

java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException

Just implement Serializable If you’re getting a NotSerializableException like follows, java.io.NotSerializableException: bean.ProjectAreaBean then it simply means that the class as identified by the fully qualified name in the exception message (which is bean.ProjectAreaBean in your case) does not implement the Serializable interface while it is been expected by the code behind. Fixing it is relatively … Read more