수정은 포기하려 했으나 완료

HTTP Status 500 -

---

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: IO 예외 상황: The Network Adapter could not establish the connection
	at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:498)
	at org.apache.jsp.board_modify_insert_jsp._jspService(board_modify_insert_jsp.java:114)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:92)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:162)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
	at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
	at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
	at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:420)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
	at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
	at java.lang.Thread.run(Thread.java:534)

root cause

java.sql.SQLException: IO 예외 상황: The Network Adapter could not establish the connection
	at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
	at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
	at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:334)
	at oracle.jdbc.ttc7.TTC7Protocol.handleIOException(TTC7Protocol.java:3678)
	at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:352)
	at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:365)
	at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:547)
	at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:347)
	at java.sql.DriverManager.getConnection(DriverManager.java:512)
	at java.sql.DriverManager.getConnection(DriverManager.java:171)
	at org.apache.jsp.board_modify_insert_jsp.DB_Connection(board_modify_insert_jsp.java:20)
	at org.apache.jsp.board_modify_insert_jsp._jspService(board_modify_insert_jsp.java:66)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:92)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:162)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
	at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
	at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
	at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:420)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
	at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
	at java.lang.Thread.run(Thread.java:534)

찾아보니까.. 구문 오류는 없고.. 서버 내부 오류라는데.. 뭔지 모르겠네요;..

그냥 쿨하게 수정은 포기.. 수정안하고.. 삭제하고 새로 쓰라지 뭐;..



ps. 그래도 완료해보고 싶어서 문제가 되는 지점을 찾았으나.. 계속 null 값만 나오네요..
그래도 어디가 문제인줄 알았으니.. 오늘 내로 해결할 수 있을것 같습니다..

ps. 하나씩 값 찍어보면서 null 값을 찾아내고.. 인터넷 뒤져가면서 문법 작성하고.. 결국 완성했습니다..
이제 서버에 올린 파일 삭제를 해야겠네요..

ps. 저처럼 JSP 공부를 하시는 분들을 위해서 게시판 만든 소스를 올려드립니다..
고수분들이 보시면 비웃을 정도로 조잡한 코드지만.. 4일만에 여기까지 올라오느라 힘들었다는 점 이해해주시길 바랍니다..

게시판 작업.zip