Servlet Class Object Recompiled with Simple Revision but now Generating a 500 error.

[Michele Smith]

Hello I recently changed some code:

This is the code I changed. I changed it to say "Financial Reports" where you see the Financial Reports in the code; before the servlet only said Reports. I recompiled and sent the servlet to the server. As you can see this involves xml.

For some reason now I am getting an error like it isn't refreshing.

Here is the code and the error is a 500.

Thank you,

package bcc.pages;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;

import com.bc.util.BcSQLAgent;
import com.bc.util.logging.Logger;
import bcc.lib.Context;
import bcc.lib.dob.Case;
import bcc.lib.dob.CaseDMDocuments;
import bcc.lib.dob.Home;
import bcc.lib.dob.TransFiles;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;


public class SelectFinanceReporting extends bcc.lib.BasePageJQuery
{
	protected String getBanner( Context ctx, BcSQLAgent agt, HttpServletRequest req )
	{
		return "Financial Reports";
	}

	protected String getContent( Context ctx, BcSQLAgent agt, HttpServletRequest req, HttpServletResponse res ) throws Exception
	{
		try
		{
			StringBuffer sb = new StringBuffer();
			
			sb.append("<FinancialReports>");
			addStateInformation(sb, ctx);
			Home h = ctx.getHome(agt);
			
			h.getXML(sb);

			sb.append( "</FinancialReports>" );

      Logger.finest( this, "getContent", "XML =\n" + sb.toString() );

			return ctx.parseStylesheet( agt, "SelectFinanceReporting.xsl", sb );
    }
    catch ( Exception e )
    {
			throw e;
    }
	}

	protected String getNavBarItem( Context ctx, BcSQLAgent agt, HttpServletRequest req ) throws Exception
	{
    return "SelectFinanceReporting";
	}
}

Error:

type Exception report

message

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

exception

javax.servlet.ServletException
bcc.lib.BaseBccServlet.doPost(BaseBccServlet.java:106)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)


root cause

javax.servlet.ServletException
bcc.lib.BasePageJQuery.doServletFunction(BasePageJQuery.java:48)
bcc.lib.BaseBccServlet.doPost(BaseBccServlet.java:102)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)


root cause

java.lang.NullPointerException
bcc.lib.Context.getDisplayLifeReviewForUser(Context.java:932)
bcc.lib.NavBar._generateHTML(NavBar.java:145)
bcc.lib.NavBar.getHTML(NavBar.java:114)
bcc.lib.Context.getNavBarHTML(Context.java:1098)
bcc.lib.BasePageJQuery.getNavBar(BasePageJQuery.java:312)
bcc.lib.BasePageJQuery.buildPage(BasePageJQuery.java:84)
bcc.lib.BasePageJQuery.doServletFunction(BasePageJQuery.java:42)
bcc.lib.BaseBccServlet.doPost(BaseBccServlet.java:102)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.


--------------------------------------------------------------------------------

Apache Tomcat/5.5.17

[Bear Bibeault]

This is the important part:
root cause

java.lang.NullPointerException
bcc.lib.Context.getDisplayLifeReviewForUser(Context.java:932)

[Michele Smith]

Hello I am having difficulty with understanding what happened. All I did was change a couple of words and now it is generating an error 500. When I roll it back it makes no difference.

Could you please help me understand why now an error 500?

thanks,

[Bear Bibeault]

If you are saying that when you reverted back to the previous code that things are still failing, then it's clear that something else has changed. Again, the stack trace points you to the line of the error. You'll need to figure out why a null reference is occurring.

[Michele Smith]

the portion of the servlet referenced in the error is this:

    public String getDisplayLifeReviewForUser( BcSQLAgent agt ) throws Exception
    {
      if (getDisplayLifeReviewForHome( agt ).equals( FALSE )) 
      {
        if (_displayLifeReviewForUser == null) 
        {
          _loadUserValues( agt );
        }
        return _displayLifeReviewForUser;
      }
      else 
      {
        return FALSE;
      }
    }  // getDisplayLifeReviewForUser()

[Michele Smith]

I noticed there was an error referring to this on another servlet called NavBar.java, it was corrected to say this:

   transformer.setParameter( "displayLifeReviewForUser", _ctx.getDisplayLifeReviewForUser( agt ) );

[Michele Smith]

Holy moly, this is pretty complicated.

I reverted back to a previous version in subversion and the error went away.

Thanks anyway,

[Bear Bibeault]

Now that you know what revision does not exhibit the failure, it will be easy to do a diff and see what the changes were. One of the changes must be the cause of the failure.