Unable to compile JSP in Java Server

Hi:
I have installed Java Application Server Platform Edition 8 locally and attempting to run an application with a JSP. However, when it attempts to compile the JSP, I get the following message:
org.apache.jasper.JasperException: Unable to compile class for JSP
No Java compiler was found to compile the generated source for the JSP.
This can usually be solved by copying manually $JAVA_HOME/lib/tools.jar from the JDK
to the common/lib directory of the Tomcat server, followed by a Tomcat restart.
If using an alternate Java compiler, please check its installation and access path.
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:132)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:356)
     org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:420)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:463)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:444)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:557)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:306)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:253)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:861)
     sun.reflect.GeneratedMethodAccessor66.invoke(Unknown Source)
     sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     java.lang.reflect.Method.invoke(Method.java:324)
     org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:289)
     java.security.AccessController.doPrivileged(Native Method)
     javax.security.auth.Subject.doAsPrivileged(Subject.java:500)
     org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:311)
     org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:205)
I thought that Tomcat came with the implementation of the JAVA server. If so, why am I getting this message? Do I have to also install Tomcat separately? If yes, is there anything I need to know about port conflicts? Java Server is currently using 8080 for HTTP. Please advise as to how I can resolve this problem.

Hi,
You may want to search this forum using the search term "Unable to compile class for JSP" you will get many hits and some suggestions on what may be the issue.
http://onesearch.sun.com/search/developers/index.jsp?col=devforums&qp_name=J2EE+Software+Development+Kit+%28J2EE+SDK%29&qp=forum%3A136&qt=Unable+to+compile+class+for+JSP

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              <Jan 9, 2002 4:00:06 PM EST> <Info> <HTTP> <[HTTP myserver] Loading DefaultWebApp_myserver
              from directory: .\config\Synchronoss\applications\DefaultWebApp_myserver>
              <Jan 9, 2002 4:00:06 PM EST> <Info> <HTTP> <[WebAppServletContext(4157813,DefaultWebApp_myserver)]
              registering JSPServlet with initArgs '[JspConfig: verbose=true,packagePrefix=jsp_servlet,-compiler=javac,compileFlags=,workingDir=C:\engr\project\ppp\.\config\Synchronoss\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver,pageCheckSeconds=1,superclass=null,keepgenerated=false,encoding=null,defaultfilename=index.jsp,noTryBlocks=false]'>
              <Jan 9, 2002 4:00:06 PM EST> <Info> <HTTP> <[WebAppServletContext(4157813,DefaultWebApp_myserver)]
              registering classpath servlet with initArgs 'null'>
              <Jan 9, 2002 4:00:06 PM EST> <Info> <HTTP> <[WebAppServletContext(4157813,DefaultWebApp_myserver)]
              registering getior servlet with initArgs 'null'>
              

    [att1.html]
              

  • Failure in pre-compiling JSP's

              Hi,
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              sql/_showcode.java (No such file or directory)
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              at java.io.FileOutputStream.<init>(FileOutputStream.java, Compiled Code)
              at java.io.FileWriter.<init>(FileWriter.java, Compiled Code)
              at weblogic.servlet.jsp.Jsp2Java.makeOutputStream(Jsp2Java.java, Compiled Code)
              at weblogic.utils.compiler.CodeGenerator.generateCode(CodeGenerator.java, Compiled
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              at weblogic.servlet.jsp.Precompiler.compile(Precompiler.java, Compiled Code)
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              at weblogic.t3.srvr.HttpServer.loadWARContext(HttpServer.java, Compiled Code)
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              Code)
              at weblogic.t3.srvr.HttpServer.start(HttpServer.java, Compiled Code)
              at weblogic.t3.srvr.T3Srvr.start(T3Srvr.java, Compiled Code)
              at weblogic.t3.srvr.T3Srvr.main(T3Srvr.java, Compiled Code)
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              << cannot make temp directory '/cemr2/dev1/app/examples/j sp/tagext/quote/WEB-INF/_tmp_war_quote',
              will not be >>
              You don't have sufficiend permission to crease directory.
              Thnaks
              Jignesh Patel
              "Sreenivas Kotapati" <[email protected]> wrote:
              >
              >Hi,
              >
              >I am getting the following error while pre-compiling a jsp (showcode.jsp).
              >
              >I am using weblogic 5.1 SP8.
              >
              >Wed Oct 24 12:03:09 MDT 2001:<E> <WebAppServletContext-quote> cannot
              >make temp
              >directory '/cemr2/dev1/app/examples/j
              >sp/tagext/quote/WEB-INF/_tmp_war_quote', will not be able to compile
              >JSPs
              >Wed Oct 24 12:03:09 MDT 2001:<I> <WebAppServletContext-quote> checking
              >/showcode.jsp:
              >Wed Oct 24 12:03:11 MDT 2001:<E> <WebAppServletContext-quote> failure
              >pre-compiling
              >JSP's
              >java.io.FileNotFoundException: /cemr2/dev1/app/examples/jsp/tagext/quote/WEB-INF/_tmp_war_quote/examples/jsp/tagext/
              >sql/_showcode.java (No such file or directory)
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              >Code)
              > at java.io.FileOutputStream.<init>(FileOutputStream.java, Compiled
              >Code)
              > at java.io.FileOutputStream.<init>(FileOutputStream.java, Compiled
              >Code)
              > at java.io.FileWriter.<init>(FileWriter.java, Compiled Code)
              > at weblogic.servlet.jsp.Jsp2Java.makeOutputStream(Jsp2Java.java, Compiled
              >Code)
              > at weblogic.utils.compiler.CodeGenerator.generateCode(CodeGenerator.java,
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              >Code)
              > at weblogic.utils.compiler.CodeGenerator.generate(CodeGenerator.java,
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              >Code)
              > at weblogic.servlet.jsp.Precompiler.compileOne(Precompiler.java, Compiled
              >Code)
              > at weblogic.servlet.jsp.Precompiler.compile(Precompiler.java, Compiled
              >Code)
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              > at weblogic.servlet.internal.dd.DescriptorLoader.createServletContext(DescriptorLoader.java,
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              >Code)
              > at weblogic.t3.srvr.HttpServer.initServletContexts(HttpServer.java,
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              >Code)
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              > at weblogic.Server.main(Server.java, Compiled Code)
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  • Pre-compile jsp in Weblogic

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              What is the wrong here ? Is there any special configuration in weblogic server that I am ignoring here ?
              =======================================
              <Nov 9, 2004 9:33:32 AM EST> <Debug> <HTTP> <101211> <ppdm:jsp Precompiling JSPs at startup with JSP config [JspConfig: verbose=true,package
              Prefix=jsp_servlet,-compiler=javac,compileFlags=,workingDir=C:\bea\user_projects\icmgdomain\.\icmgone\.wlnotdelete\icmgone_ppdm_jsp,pageChec
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              <Nov 9, 2004 9:33:52 AM EST> <Error> <Deployer> <149233> <Unexpected error was encountered during the deployment process.>
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              >
              

  • First use of jsp and java bean and "Unable to compile class for JSP" error

    Hi,
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    /usr/local/tomcat/jakarta-tomcat-5/build/work/Catalina/localhost/test/org/apache/jsp/login_jsp.java:43: cannot resolve symbol
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    </body>
    </html>
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    import java.sql.DriverManager;
    import java.sql.SQLException;
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    public CMBConnect () { }
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    Connection con = null;
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    Thanks again!

    Thanks for you help
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  • Unable to compile class for JSP

    Please can anyone help me to solve this.
    Actually,this is the condition.
    In my db,there is a table called UserPassword, which has 4
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    When the user submits the data to create a new account via HTML form, it submits the data to the file called CreateAcc.jsp. In this file it perform some logic,here are they.
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    2)check the UserName,if it is already exist in the db,
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    <%@ page language="java" %>
    <%@ page import="core.UserAccManager" %>
    <%@ page import="data.UserPassword" %>
    <jsp:useBean id="UserAccManager" class="core.UserAccManager" scope="session"/>
    <jsp:setProperty name="UserAccManager" property="*"/>
    <jsp:useBean id="UserPassword" class="data.UserPassword" scope="session"/>
    <jsp:setProperty name="UserPassword" property="*"/>
    <%
    String nextPage ="MainForm.jsp";
    if(UserPassword.verifyEmpno()){
         if(UserPassword.verifyUsername()){
              if(UserPassword.createAcc()) nextPage ="MsgAcc.jsp";
          }else{
               nextPage="UserNameExist.jsp";
          else{
              nextPage="UserAccError.jsp";
    %>
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    UserPassword.java- F:/Project/core/data/UserPassword.java
    UserAccManager.java - F:/Project/core/UserAccManager.java
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    UserAccManager.class - webapps/mySystemName/WEB-INF/classes/core/
    UserPassword.class - webapps/mySystemName/WEB-INF/classes/core/data/
    Here is the full code of the file UserAccManager.java.
    package core;               //Is this right?
    import data.UserPassword;     //Is this right?
    import java.io.*;
    import java.sql.*;
    import java.util.*;
    import javax.sql.*;
    import javax.servlet.*;
    import javax.servlet.http.*;
    public final class UserAccManager{
       private static final String DRIVER = "com.mysql.jdbc.Driver";
       private static final String URL = "jdbc:mysql://localhost:3306/superfine";
       private static Connection connection;
       private static PreparedStatement pstmt1;
       private static PreparedStatement pstmt2;     
       private static PreparedStatement pstmt3;     
       private UserAccManager(){
       // Initializes the connection and statements
       public static void initConnection() {
          if (connection == null) {
             try {
                String sql;
                // Open the database
                Class.forName(DRIVER).newInstance();
                connection = DriverManager.getConnection(URL);
                // Prepare the statements
               sql = "SELECT * FROM UserPassword where empNo= ?";
               pstmt1 = connection.prepareStatement(sql);
                sql = "SELECT UserName FROM UserPassword where UserName= ?";
                pstmt2 = connection.prepareStatement(sql);
             sql ="INSERT INTO UserPassword VALUES(?,?,?,?)";
             pstmt3 = connection.prepareStatement(sql);
             catch (Exception ex) {
                System.err.println(ex.getMessage());
       // Closes the connection and statements
       // Method to be called by main class when finished with DB
       public  void closeConnection() {
          //same as previous
       public static boolean verifyEmpno(int empno) {
          boolean emp_no_select_ok = false;
          int emp = -1;
          initConnection();
         try {
          pstmt1.setInt(1, empno);
             ResultSet rs1 = pstmt1.executeQuery();
         while(rs1.next()){
              emp=rs1.getInt("empNo");
         if(emp>0)
              emp_no_select_ok = false;
         } else{
              emp_no_select_ok = true;     
            rs1.close();
         pstmt1.close();     
          catch (Exception ex) {
             System.err.println(ex.getMessage());
          return emp_no_select_ok;
       public static boolean verifyUsername(String username) {
          boolean user_name_select_ok = false;
          String user = "xxxx";
          initConnection();
          try {
          pstmt2.setString(1, username);
             ResultSet rs2 = pstmt2.executeQuery();
            while(rs2.next()){
              user=rs2.getString("UserName");
               if(!user.equals("xxxx"))
              user_name_select_ok = false;
            } else{
              user_name_select_ok = true;     
           rs2.close();
          catch (Exception ex) {
             System.err.println(ex.getMessage());
          return user_name_select_ok;
         public static boolean createAcc(int empno, String username, String password, int
    level){
              boolean create_acc_ok = false;
              initConnection();
              try{
                      //create a new object,from the UserPassword table.
                   UserPassword useraccount = new UserPassword();
                   useraccount.setEmpno(empno);
                   useraccount.setUsername(username);
                   useraccount.setPassword(password);
                   useraccount.setLevel(level);
                   //assign value for ???
                   pstmt3.setInt(1, useraccount.getEmpno());
                   pstmt3.setString(2, useraccount.getUsername());
                   pstmt3.setString(3, useraccount.getPassword());
                   pstmt3.setInt(4, useraccount.getLevel());          
                   if(pstmt3.executeUpdate()==1) create_acc_ok=true;
                   pstmt3.close();
                           //con.close();
                catch(SQLException e2){
                           System.err.println(e2.getMessage());
              return create_acc_ok;
    }here is the bean (part of it)
    package data;               //is it right?
    import java.io.*;
    import java.sql.*;
    import java.util.*;
    import javax.sql.*;
    import javax.servlet.*;
    import javax.servlet.http.*;
    public class UserPassword
         private int empno;
         private String username;
         private String password;
         private int level;
         // Constructor
         public UserPassword()
              this.empno = empno;
              this.username = username;
              this.password = password;
              this.level = level;
         // setters and getters are here.
    //     public boolean verifyEmpno() {
    //               return UserAccManager.verifyEmpno(empno);
    //       public boolean verifyUsername(String username) {
    //            return UserAccManager.verifyUsername(username);
         // These 2 methods not compile with or without para's.So I leave that job for the      
         //controll class UserAccManager.java.
    Now my problem is this: When I submit data, there is an error;org.apache.jasper.JasperException: Unable to compile class for JSP
    An error occurred at line: -1 in the jsp file: null
    Generated servlet error:
    [javac] Compiling 1 source file
    C:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:8:
    cannot access core.data.UserPassword
    bad class file: C:\Program Files\Apache Group\Tomcat
    4.1\webapps\HRM\WEB-INF\classes\core\data\UserPassword.class
    class file contains wrong class: data.UserPassword
    Please remove or make sure it appears in the correct subdirectory of the classpath.
    import core.data.UserPassword;
    ^
    1 error
    Are there any mistakes? If so tell me where is it and how to change them.Please help.

    I try it that way, but it don't compile.
    Error:core\data\UserPassword.java:package javax.servlet does not exist
    import javax.servlet.*;
    core\data\UserPassword.java:package javax.servlet.http does not exist
    import javax.servlet.http.*;
    So,I comment them only in the UserPassword.java file,and compile it again.
    Then it compile well.I goto the directory to get the .class files.
    But there is only UserPassword.class inside the data folder. There is not
    UserAccManager.class in the core folder.
    Then I try this way,I put my 2 java files in to a new folder,
    F:\SystemName\com
    When I try it that way, but it don't compile.
    javac -classpath . -d . com\*.javaError:com\UserPassword.java:package javax.servlet does not exist
    import javax.servlet.*;
    com\UserPassword.java:package javax.servlet.http does not exist
    import javax.servlet.http.*;
    So,I comment them only in the UserPassword.java file,and compile it again.
    Now both are compiling well.There was 2 class files.
    I put them in to the WEB-INF/classes/com directory.
    Start the server.But it gave errors:
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:68: cannot resolve symbol
    symbol  : variable empno
    location: class org.apache.jsp.CreateAcc_jsp
    if(UserPassword.verifyEmpno(empno)){
                                ^
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:69: cannot resolve symbol
    symbol  : variable username
    location: class org.apache.jsp.CreateAcc_jsp
         if(UserAccManager.verifyUsername(username)){
                                             ^
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:69: non-static method
    verifyUsername(java.lang.String) cannot be referenced from a static context
         if(UserAccManager.verifyUsername(username)){
                             ^
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
    symbol  : variable empno
    location: class org.apache.jsp.CreateAcc_jsp
              if(UserAccManager.createAcc(empno, username,password,level)) nextPage
    ="MsgAcc.jsp";
                                                ^
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
    symbol  : variable username
    location: class org.apache.jsp.CreateAcc_jsp
              if(UserAccManager.createAcc(empno, username,password,level)) nextPage
    ="MsgAcc.jsp";
                                                       ^
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
    symbol  : variable password
    location: class org.apache.jsp.CreateAcc_jsp
              if(UserAccManager.createAcc(empno, username,password,level)) nextPage
    ="MsgAcc.jsp";
                                                                ^
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
    symbol  : variable level
    location: class org.apache.jsp.CreateAcc_jsp
              if(UserAccManager.createAcc(empno, username,password,level)) nextPage
    ="MsgAcc.jsp";
                                                                         ^
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: non-static method
    createAcc(int,java.lang.String,java.lang.String,int) cannot be referenced from a static
    context
              if(UserAccManager.createAcc(empno, username,password,level)) nextPage
    ="MsgAcc.jsp";
                                     ^
    8 errorsTo solve the problem non-static method,I goto the UserAccManager.java file and do these
    things.
    package com;
    import java.io.*;
    import java.sql.*;
    import java.util.*;
    import javax.sql.*;
    //import javax.servlet.*;               //otherwise it tells an error.(package           
                                  //javax.servlet does not exist)
    //import javax.servlet.http.*;
    public  class UserAccManager {
       private static final String DRIVER = "com.mysql.jdbc.Driver";
       private static final String URL = "jdbc:mysql://localhost:3306/superfine";
       private static Connection connection;
       private static PreparedStatement pstmt1;
        private static PreparedStatement pstmt2;
          private static PreparedStatement pstmt3;
       private UserAccManager() {
       // Initializes the connection and statements
       private static void initConnection() {
             //same
       // Closes the connection and statements
       // Method to be called by main class when finished with DB
       public static void closeConnection() {
         //same
       public static boolean verifyEmpno(int empno) {
          // same.
       public static boolean verifyUsername(String username) {
         //same.
         public static boolean createAcc(int empno, String username, String password, int      
    level){
              //same
    package com;
    import java.io.*;
    import java.sql.*;
    import java.util.*;
    import javax.sql.*;
    //import javax.servlet.*;
    //import javax.servlet.http.*;
    public class UserPassword {
         // same
    Again compile those files and put .class filses into the WEB-INF/classes/com directory.
    When i submits the data via the form it generates an error:
    org.apache.jasper.JasperException: Unable to compile class for JSP
    An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
    Generated servlet error:
        [javac] Compiling 1 source file
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:68: cannot resolve symbol
    symbol  : variable empno
    location: class org.apache.jsp.CreateAcc_jsp
    if(UserAccManager.verifyEmpno(empno)){
                                  ^
    An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
    Generated servlet error:
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:69: cannot resolve symbol
    symbol  : variable username
    location: class org.apache.jsp.CreateAcc_jsp
         if(UserAccManager.verifyUsername(username)){
                                             ^
    An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
    Generated servlet error:
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
    symbol  : variable empno
    location: class org.apache.jsp.CreateAcc_jsp
              if(UserAccManager.createAcc(empno, username,password,level)) nextPage
    ="MsgAcc.jsp";
                                                ^
    An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
    Generated servlet error:
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
    symbol  : variable username
    location: class org.apache.jsp.CreateAcc_jsp
              if(UserAccManager.createAcc(empno, username,password,level)) nextPage
    ="MsgAcc.jsp";
                                                       ^
    An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
    Generated servlet error:
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
    symbol  : variable password
    location: class org.apache.jsp.CreateAcc_jsp
              if(UserAccManager.createAcc(empno, username,password,level)) nextPage
    ="MsgAcc.jsp";
                                                                ^
    An error occurred at line: 9 in the jsp file: /CreateAcc.jsp
    Generated servlet error:
    C:\Program Files\Apache Group\Tomcat
    4.1\work\Standalone\localhost\HRM\CreateAcc_jsp.java:70: cannot resolve symbol
    symbol  : variable level
    location: class org.apache.jsp.CreateAcc_jsp
              if(UserAccManager.createAcc(empno, username,password,level)) nextPage
    ="MsgAcc.jsp";
                                                                         ^
    6 errorshere is the CreateAcc.jsp file
    <%@ page language="java" %>
    <%@ page import="com.UserAccManager" %>
    <%@ page import="com.UserPassword" %>
    <jsp:useBean id="userPassword" class="com.UserPassword" scope="request"/>
    <jsp:setProperty name="userPassword" property="*" />
    <%
    String nextPage ="MainForm.jsp";
    if(UserAccManager.verifyEmpno(empno)){
         if(UserAccManager.verifyUsername(username)){
              if(UserAccManager.createAcc(empno, username,password,level)) nextPage
    ="MsgAcc.jsp";
          }else{
               nextPage="UserNameExist.jsp";
          else{
              nextPage="UserAccError.jsp";
    %>
    <jsp:forward page="<%=nextPage%>"/>Please, anyone know how to send these parameters to the java file.
    Thanks.

  • Unable to compile class for JSP. apache-tomcat-6. What could be wrong?

    Hello, I am new to JSP and I am trying a very basic jsp and class file on Windows XP. I get the Unable to compile class for JSP.
    Steps that I have done:
    javac ch06_01.java , placed the ch06_01.class under
    C:\Apps\apache-tomcat-6.0.16\webapps\ch06\WEB-INF\classes
    Then grabbed the ch06_02.jsp and placed it under
    C:\Apps\apache-tomcat-6.0.16\webapps\ch06\
    When I run it (by placing this into Explorer or Firefox URL
    http://localhost:8080/ch06/ch06_02.jsp) I get the error further
    below. Things I have done and made sure they are in place are:
    set up JAVA_HOME to C:\Apps\jdk1.6.0_06
    Using CATALINA_BASE: C:\Apps\apache-tomcat-6.0.16
    Using CATALINA_HOME: C:\Apps\apache-tomcat-6.0.16
    Using CATALINA_TMPDIR: C:\Apps\apache-tomcat-6.0.16\temp
    Using JRE_HOME: C:\Apps\jre1.6.0_06
    I did a google on the error and I found people saying to place the
    tools.jar from the jsk into the lib directory under CATALINA_HOME. But
    the examples still don't work. What step could I be missing? Your help is greatly
    appreciated.
    This is the simple jsp file:
    <%@ page import="ch06_01" %>
    <HTML>
    <HEAD>
    <TITLE>Using a JavaBean</TITLE>
    </HEAD>
    <BODY>
    <H1>Using a JavaBean</H1>
    <% ch06_01 messager = new ch06_01(); %>
    The message is: <%= messager.msg() %>
    </BODY>
    </HTML>
    this is the simple ch6_01 java file:
    public class ch06_01
    public ch06_01()
    public String msg()
    return "Hello from JSP!";
    HTTP Status 500 -
    type Exception report
    message
    description The server encountered an internal error () that prevented
    it from fulfilling this request.
    exception
    org.apache.jasper.JasperException: Unable to compile class for JSP:
    An error occurred at line: 6 in the generated java file
    The import ch06_01 cannot be resolved
    An error occurred at line: 9 in the jsp file: /ch06_02.jsp
    ch06_01 cannot be resolved to a type
    6: <BODY>
    7: <H1>Using a JavaBean</H1>
    8:
    9: <% ch06_01 messager = new ch06_01(); %>
    10:
    11: The message is: <%= messager.msg() %>
    12:
    An error occurred at line: 9 in the jsp file: /ch06_02.jsp
    ch06_01 cannot be resolved to a type
    6: <BODY>
    7: <H1>Using a JavaBean</H1>
    8:
    9: <% ch06_01 messager = new ch06_01(); %>
    10:
    11: The message is: <%= messager.msg() %>
    12:
    Stacktrace:
    org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
    org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
    org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:423)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:316)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:294)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:281)
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    Edited by: indikon1 on Jun 12, 2008 1:18 PM
    I just updated the directories of the variables to reflect the current status of my system.

    What is wrong is that you are using an "old" jsp tutorial :-)
    Since Java 1.4, JSPs have been unable to access classes in the "default" package.
    What you need to do:
    Put the java class ch06_01 in a package.
    Steps to do this
    - Edit ch06_01 and add the following to the very top of the file (without the quotes): "package mypackage;"
    - create a folder "mypackage"
    - move ch06_01.java into that folder
    - compile that class (now in the mypackage package)
    - place ch06_01.class under C:\Apps\apache-tomcat-6.0.16\webapps\ch06\WEB-INF\classes\mypackage
    In your jsp:
    <%@ page import="mypackage.ch06_01" %>
    I would suggest using a more up-to-date tutorial that uses JSTL.
    Take a look at this [Apache Tomcat tutorial|http://www.coreservlets.com/Apache-Tomcat-Tutorial/index.html]

  • Unable to compil class for jsp

    error is
    HTTP Status 500 -
    description The server encountered an internal error () that prevented it from fulfilling this request.
    exception
    org.apache.jasper.JasperException: Unable to compile class for JSP:
    An error occurred at line: 6 in the generated java file
    Syntax error on token ".", Identifier expected after this token
    An error occurred at line: 7 in the generated java file
    Syntax error on token ".", Identifier expected after this token
    An error occurred at line: 9 in the jsp file: /travel/issue.jsp
    LibraryStudent cannot be resolved to a type
    6: <BODY>
    7: <H1>issue books</H1>
    8: <CENTER>
    9: <jsp:useBean id="student"
    10: type="LibraryStudent"
    11: scope="session" />
    12: student name:
    An error occurred at line: 9 in the jsp file: /travel/issue.jsp
    LibraryStudent cannot be resolved to a type
    6: <BODY>
    7: <H1>issue books</H1>
    8: <CENTER>
    9: <jsp:useBean id="student"
    10: type="LibraryStudent"
    11: scope="session" />
    12: student name:
    An error occurred at line: 13 in the jsp file: /travel/issue.jsp
    LibraryStudent cannot be resolved to a type
    10: type="LibraryStudent"
    11: scope="session" />
    12: student name:
    13: <jsp:getProperty name="student" property="studentName" />
    14:
    15: book name:
    16: <jsp:getProperty name="student" property="bookName" />
    An error occurred at line: 16 in the jsp file: /travel/issue.jsp
    LibraryStudent cannot be resolved to a type
    13: <jsp:getProperty name="student" property="studentName" />
    14:
    15: book name:
    16: <jsp:getProperty name="student" property="bookName" />
    17:
    18: <jsp:getProperty name="student"
    19: property="issueData" />
    An error occurred at line: 18 in the jsp file: /travel/issue.jsp
    LibraryStudent cannot be resolved to a type
    15: book name:
    16: <jsp:getProperty name="student" property="bookName" />
    17:
    18: <jsp:getProperty name="student"
    19: property="issueData" />
    20: </FORM>
    21: </CENTER>LibraryStudent.java is   
    import java.util.*;
    import java.text.*;
    import java.io.*;
    import javax.servlet.*;
    import javax.servlet.http.*;
    import java.sql.*;
    import java.util.*;
    public class LibraryStudent {
    private String emailAddress, s,password, sname,bname;
    private String date,value;
    public String getStudentName() {
    return(sname);
    public void setStudentName(String sname) {
    this.sname = sname;
    public String getEmailAddress() {
    return(emailAddress);
    public void setEmailAddress(String emailAddress) {
    this.emailAddress = emailAddress;
    public String getPassword() {
    return(password);
    public void setPassword(String password) {
    this.password = password;
    public String getBookName() {
    return(bname);
    public void setBookName(String bname) {
    this.bname = bname;
    public String getDate() {
    return(date);
    public void setDate(String date) {
    this.date = date;
    public String getIssueData() //method that create connection withh database
    throws ServletException,IOException{
    try{
    getDate();                   //and add a entry in database
    getBookName();
    getStudentName();
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection con=DriverManager.getConnection("jdbc:odbc:db2");
    Statement st=con.createStatement();
    String sql =
        "insert into table1 (bookname,studentname,date) values(bname,sname,date)";
      st.executeUpdate(sql);
    System.out.println(sql);
    String s=  "your book has been issued ";
    return(s);
    catch(Exception e)
    e.printStackTrace();
    return "failed";
    public String getSumbitData()
    throws ServletException,IOException{
    try
    getBookName();
    getStudentName();
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection con=DriverManager.getConnection("jdbc:odbc:db2");
    Statement st=con.createStatement();
    String sql =
        "delete from db2 where bookname='bname' and studentname=sname";
      st.executeUpdate(sql);
    System.out.println(sql);
    String s="your book has been sumbitted ";
    return(s) ;
    catch(Exception e)
    e.printStackTrace();
    return "failed";
    public static int findStudent    //to validate customer
    (String emailAddress,
    String password) throws ServletException,IOException{
    try
    if (emailAddress == null) {
    return(0);
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection con=DriverManager.getConnection("jdbc:odbc:user");
    Statement st=con.createStatement();
    String sql="select * from user where name='"+emailAddress+"' and password='"+password+"'";
    System.out.println(sql);
    ResultSet rs=st.executeQuery(sql);
    if(rs.next())
    return(1);
    else
    return(0);
    }catch(Exception e)
    e.printStackTrace();
    return (0);}
      to be continued.............

    and Library.java is import java.io.*;
    import javax.servlet.*;
    import javax.servlet.http.*;
    public class Library extends HttpServlet {
    public void doPost(HttpServletRequest request,
    HttpServletResponse response)
    throws ServletException, IOException {
    String emailAddress = request.getParameter("emailAddress");//use to email&pass
    String password = request.getParameter("password");//from html page
    LibraryStudent student = new LibraryStudent();//Make a student Object
    int a=LibraryStudent.findStudent(emailAddress, password);//to validate student
    if (a==0) {
    gotoPage("/library/accounts.jsp", request, response);
    else
    student.setStudentName(request.getParameter("sname"));//use to sent other textbox
    student.setBookName(request.getParameter("bname"));//data in librarystudent
    student.setDate(request.getParameter("date"));//class after validation
    HttpSession session = request.getSession(true);
    session.putValue("student", student);
    //for moving different page
    if (request.getParameter("issue") != null) {
    gotoPage("/travel/issue.jsp",
    request, response);
    } else if (request.getParameter("sumbit") != null) {
    gotoPage("/travel/sumbit.jsp",
    request, response);
    } else if (request.getParameter("search") != null) {
    gotoPage("/travel/search.jsp",
    request, response);
    } else if (request.getParameter("account") != null) {
    gotoPage("/travel/EditAccounts.jsp",
    request, response);
    } else {
    gotoPage("/travel/IllegalRequest.jsp",
    request, response);
    private void gotoPage(String address,
    HttpServletRequest request,
    HttpServletResponse response)
    throws ServletException, IOException {
    RequestDispatcher dispatcher =
    getServletContext().getRequestDispatcher(address);
    dispatcher.forward(request, response);
    }    issue.jsp is
       <%@page import="java.io.,java.util.,java.sql.*"%>
    <HTML>
    <HEAD>
    <TITLE>issue books</TITLE>
    </HEAD>
    <BODY>
    <H1>issue books</H1>
    <CENTER>
    <jsp:useBean id="student"
    type="LibraryStudent"
    scope="session" />
    student name:
    <jsp:getProperty name="student" property="studentName" />
    book name:
    <jsp:getProperty name="student" property="bookName" />
    <jsp:getProperty name="student"
    property="issueData" />
    </FORM>
    </CENTER>
    </BODY>
    </HTML> plz solve my problem .i m new to servlet and jsp and i have keen desire to learn this topic

  • Unable to compile class for JSP--- help me plz!!!!!

    hi friends;
    Pease suggest me where i am wrong, i think javabean is not instantiated in jsp file.may be it is related to the classpath of javabean. i have not set any variable for javabean classpath. and i put javabean class file in
    TOMCAT_HOME/webapps/test3/WEB-INF/UseDta.class
    and all the jsp and html in /test3. my jsp an javabeans are--
    1. GetName.html
    <HTML>
    <BODY>
    <FORM METHOD=POST ACTION="SaveName.jsp">
    What's your name? <INPUT TYPE=TEXT NAME=username SIZE=20><BR>
    What's your e-mail address? <INPUT TYPE=TEXT NAME=email SIZE=20><BR>
    What's your age? <INPUT TYPE=TEXT NAME=age SIZE=4>
    <P><INPUT TYPE=SUBMIT>
    </FORM>
    </BODY>
    </HTML>
    2. SaveName.jsp
    <jsp:useBean id="user" class="UserData" scope="session">
    <jsp:setProperty name="user" property="*"/>
    </jsp:useBean>
    <HTML>
    <BODY>
    Continue
    </BODY>
    </HTML>
    3. UserData.java
    public class UserData {
    String username;
    String email;
    int age;
    public UserData(){}
    public void setUsername( String value )
    username = value;
    public void setEmail( String value )
    email = value;
    public void setAge( int value )
    age = value;
    public String getUsername() { return username; }
    public String getEmail() { return email; }
    public int getAge() { return age; }
    4. NextPage.jsp
    <jsp:useBean id="user" class="UserData" scope="session"/>
    <HTML>
    <BODY>
    You entered<BR>
    Name: <%= user.getUsername() %><BR>
    Email: <%= user.getEmail() %><BR>
    Age: <%= user.getAge() %><BR>
    </BODY>
    </HTML>
    url: http://localhost:8080/test3/GetName.html
    is it related to context path??
    HTTP Status 500 -
    type Exception report
    message
    description The server encountered an internal error () that prevented it from fulfilling this request.
    exception
    org.apache.jasper.JasperException: Unable to compile class for JSP
    An error occurred at line: 2 in the jsp file: /SaveName.jsp
    Generated servlet error:
    C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\test3\org\apache\jsp\SaveName_jsp.java:44: cannot find symbol
    symbol : class UserData
    location: class org.apache.jsp.SaveName_jsp
    UserData user = null;
    ^
    An error occurred at line: 2 in the jsp file: /SaveName.jsp
    Generated servlet error:
    C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\test3\org\apache\jsp\SaveName_jsp.java:46: cannot find symbol
    symbol : class UserData
    location: class org.apache.jsp.SaveName_jsp
    user = (UserData) jspxpage_context.getAttribute("user", PageContext.SESSION_SCOPE);
    ^
    An error occurred at line: 2 in the jsp file: /SaveName.jsp
    Generated servlet error:
    C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\test3\org\apache\jsp\SaveName_jsp.java:48: cannot find symbol
    symbol : class UserData
    location: class org.apache.jsp.SaveName_jsp
    user = new UserData();
    ^
    3 errors
    org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
    org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332)
    org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:437)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:497)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:476)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:464)
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    note The full stack trace of the root cause is available in the Apache Tomcat/5.0.30 logs.
    Apache Tomcat/5.0.30
    please Reply me ASAP
    i'll be glad if you reply. please

    I am using Tomcat 6.0.
    I have put my UserData class in user package and
    used in below jsp(SaveName.jsp)
    <%@ page import="user.UserData" %>
    <jsp:useBean id="user" class="user.UserData" scope="session"/>
    <jsp:setProperty name="user" property="*"/>
    <HTML>
    <BODY>
    Continue
    </BODY>
    </HTML>
    I have already set my classpath as C:\Documents and Settings\user\My Documents\Java\apache-tomcat-6.0.16\apache-tomcat-6.0.16\webapps\ROOT\WEB-INF\classes;
    UserData class is in C:\Documents and Settings\user\My Documents\Java\apache-tomcat-6.0.16\apache-tomcat-6.0.16\webapps\ROOT\WEB-INF\classes\user
    My UserData class is
    package user;
    public class UserData {
    String username;
    String email;
    int age;
         public UserData(){
              this("","",0);
              System.out.println("najn thanne puli");
         public UserData(String username,String email,int age){
              this.username=username;
              this.email=email;
              this.age=age;
    public void setUsername( String value )
    username = value;
    public void setEmail( String value )
    email = value;
    public void setAge( int value )
    age = value;
    public String getUsername() { return username; }
    public String getEmail() { return email; }
    public int getAge() { return age; }
    But running SaveName.jsp shows exception
    org.apache.jasper.JasperException: /SaveName.jsp(2,0) The value for the useBean class attribute user.UserData is invalid.
         org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
         org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
         org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:148)
         org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1200)
         org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1160)
         org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2343)
         org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2393)
         org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2399)
         org.apache.jasper.compiler.Node$Root.accept(Node.java:489)
         org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2343)
         org.apache.jasper.compiler.Generator.generate(Generator.java:3372)
         org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)
         org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
         org.apache.jasper.compiler.Compiler.compile(Compiler.java:294)
         org.apache.jasper.compiler.Compiler.compile(Compiler.java:281)
         org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
         org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
         org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
         org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
         javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    Please help me.thanks in advance.

  • J2EE app server not able to compile JSP

    Hi,
    I have just installed J2EE app server and am trying to deploy a JSP. The following error is generated. can anyone help me please.
    Thank you,
    Deepika.
    org.apache.jasper.JasperException: Unable to compile class for JSP
    No Java compiler was found to compile the generated source for the JSP.
    This can usually be solved by copying manually $JAVA_HOME/lib/tools.jar from the JDK
    to the common/lib directory of the Tomcat server, followed by a Tomcat restart.
    If using an alternate Java compiler, please check its installation and access path.
         org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127)
         org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:348)
         org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:424)
         org.apache.jasper.compiler.Compiler.compile(Compiler.java:464)
         org.apache.jasper.compiler.Compiler.compile(Compiler.java:448)
         org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:551)
         org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:300)
         org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
         org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
         javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
         sun.reflect.GeneratedMethodAccessor82.invoke(Unknown Source)
         sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
         java.lang.reflect.Method.invoke(Method.java:324)
         org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:284)
         java.security.AccessController.doPrivileged(Native Method)
         javax.security.auth.Subject.doAsPrivileged(Subject.java:500)
         org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:306)
         org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:200)

    This is a known issue.
    Here's an explanation of the behaviour you are seeing:
    The misleading error message is printed only in the case where a javac
    compilation error line number cannot be mapped back to a line number
    in the JSP source code.
    The internal representation of a JSP element ("JSP node") in the JSP compiler
    contains the following info:
    - The begin line number of the JSP element in the JSP page
    - The begin and end line numbers ("range") of the Java code that was
    generated for the JSP element
    When attempting to map a javac error line number back to the JSP
    source line, we determine the range into which the javac error line
    number falls, and retrieve the JSP source number of the JSP element
    associated with that range.
    However, in some cases, it is impossible to trace a javac error line
    number back to the JSP element that caused the error. For example,
    consider the following scriptlet:
    <%
    String query = request.getParameter("query");
    if(query != null) {
    out.println(query);
    } else {
    out.println("(null)");
    // } // <-- !Missing brace syntax error
    %>
    Since the JSP compiler wraps the generated code into a
    try-catch-finally block, the above syntax error in the scriptlet
    causes havoc with that try-catch-finally block, and results in 3 javac
    errors:
    <file>jsp.java:<line1>: 'catch' without 'try'
    } catch (Throwable t) {
    ^
    <file>jsp.java:<line2>: 'try' without 'catch' or 'finally'
    try {
    ^
    <file>jsp.java:<line3>: '}' expected
    Notice that all of the above javac error numbers are outside the range
    of the java line numbers corresponding to the scriptlet that caused the
    error, and therefore cannot be mapped back to any line numbers in the
    JSP page source.
    AS 8.0 PE does not handle this case correctly, and prints out the
    misleading error message (though the real error message can be found
    in the server log).
    Notice that this problem is going to be fixed in AS 8.1, so that if a
    javac error line number cannot be mapped back to a JSP page line
    number, the javac error is still returned to the client.
    In AS 8.0 PE, you need to check your server log to find out why the compilation failed.
    If you still have any problems, send me your JSP, and I will take a look at it.
    Thanks,
    Jan

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