今天生產環境tomcat啓動後，用戶登錄時系統報錯：java.sql.SQLException: 不能在 UTF8 和 UCS2 之間轉換: failUTF8Conv
經確認數據庫、程序、TOMCAT均未進行示改動。
在網上查詢有說是oracle jdbc驅動的問題，但我本地使用ojdbc14.jar的驅動仍不行，
參考：http://blog.csdn.net/dacong910/article/details/5432245
本地程序連生產環境數據庫調試：
DBCP borrowObject failed: java.sql.SQLException: 不能在 UTF8 和 UCS2 之間轉換: failUTF8Conv
DBCP borrowObject failed: java.sql.SQLException: 不能在 UTF8 和 UCS2 之間轉換: failUTF8Conv
DBCP borrowObject failed: java.sql.SQLException: 不能在 UTF8 和 UCS2 之間轉換: failUTF8Conv
org.apache.commons.dbcp.DbcpException: java.sql.SQLException: 不能在 UTF8 和 UCS2 之間轉換: failUTF8Conv
at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:85)
at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:184)
at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:722)
at org.apache.commons.dbcp.AbandonedObjectPool.borrowObject(AbandonedObjectPool.java:117)
at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:108)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:312)
at com.eclink.util.DBUtil.getNewConnection(DBUtil.java:160)
at com.eclink.util.DBUtil.<init>(DBUtil.java:133)
at com.eclink.util.DBUtil.<init>(DBUtil.java:99)
at com.eclink.dectr.model.sys.OfficePostDAO.getUserInfo(OfficePostDAO.java:93)
at com.eclink.dectr.controller.sys.LogonValidatorAction.login(LogonValidatorAction.java:72)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:216)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1480)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:524)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:284)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
at com.eclink.dectr.filter.ActionFilter.doFilter(ActionFilter.java:84)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:233)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
at com.eclink.dectr.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:110)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:233)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:257)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:245)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:199)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:184)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:164)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:156)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:972)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:206)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:833)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:732)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:619)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:688)
at java.lang.Thread.run(Thread.java:534)
Caused by: java.sql.SQLException: 不能在 UTF8 和 UCS2 之間轉換: failUTF8Conv
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:1130)
at oracle.jdbc.dbaccess.DBConversion.failUTF8Conv(DBConversion.java:2261)
at oracle.jdbc.dbaccess.DBConversion.utf8BytesToJavaChars(DBConversion.java:2061)
at oracle.jdbc.dbaccess.DBConversion.utf8BytesToString(DBConversion.java:1976)
at oracle.jdbc.dbaccess.DBConversion.CharBytesToString(DBConversion.java:543)
at oracle.jdbc.ttc7.TTIoer.processWarning(TTIoer.java:334)
at oracle.jdbc.ttc7.O3log.receive2nd(O3log.java:523)
at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:278)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:346)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:468)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:314)
at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:83)
... 52 more
DBCP borrowObject failed: java.sql.SQLException: 不能在 UTF8 和 UCS2 之間轉換: failUTF8Conv
發現具體異常是DBCP組件裏面拋出來的，參考文章中有一句話：
“後話：應該是因爲數據庫的密碼策略，增加了一步校驗的功能，而老驅動則不能識別這個校驗；”
剛好我發現，當使用plsql dev連接生產環境時會提示密碼即將過期，詢問是否要修改密碼。於是診斷應該是這個密碼校驗引起的，將數據庫修改一下，再改回來，重啓TOMCAT，應用正常。