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From Adile Abbadi <ad...@minitdrugs.com>
Subject RE: Error 500 messages
Date Fri, 22 Jul 2005 19:48:21 GMT
Hi Tim,

Thank you very much - that has helped - however I discovered that the
problem still exists if I have an include within an include - ie.

I have an include called this

<jsp:include page="navmenu.jsp" flush="false">

Inside that include I have another include also with flush set to false -
and I still get a blank page - however if I remove the includes within the
include then the exception is visible. Any ideas on this?

Cheers

Adile


-----Original Message-----
From: Tim Funk [mailto:funkman@joedog.org]
Sent: July 22, 2005 12:42 PM
To: Tomcat Users List
Subject: Re: Error 500 messages


flush="false"

-Tim

Adile Abbadi wrote:

> Hi Tim,
>
> Thanx for the information - I forgot about that. I guess the question is
why
> did it work in Tomcat 3 and not Tomcat 4 and second is there a workaround
to
> get it to work?
>
> Adile
>
>
> -----Original Message-----
> From: Tim Funk [mailto:funkman@joedog.org]
> Sent: July 22, 2005 12:20 PM
> To: Tomcat Users List
> Subject: Re: Error 500 messages
>
>
> This line <jsp:include page="top.html" flush="true"> will commit the
> response
> and send html back to the client. Once that is done - no error messages
will
> be sent back to the client and you will end up with a blank screen.
>
> -Tim
>
> Adile Abbadi wrote:
>
>
>>Hi Rob,
>>
>>Thanx for this - this is great - I may have to use this because I think I
>>have truly found a bug in Tomcat as this issue is not happening on my
>
> Tomcat
>
>>3 server. I did a bit more investigation and I found some interesting
>>things. This is going to be a long email with code and stuff but whoever
>>wants to read it please do - because the results are weird.
>>
>>I created the following simple JSP page
>>
>><%@ page language="java"
>>import="javax.crypto.*,java.sql.*,java.net.*,dbc.DBConnectionManager" %>
>><%^M
>>        String query = "select * from patient_info where ref_client = 38
>
> and
>
>>pat_lname like '%SM'ITH%';";
>>        DBConnectionManager connMgr;
>>        connMgr = DBConnectionManager.getInstance();
>>        Connection Conn = connMgr.getConnection("podb");
>>        Statement SQLS = Conn.createStatement();
>>        ResultSet rs = SQLS.executeQuery(query);
>>        String col1 = null;
>>        String col2 = null;
>>        while(rs.next()) {
>>                col1 = rs.getString("pat_id");
>>                col2 = rs.getString("pat_fname");
>>%>
>><%=col1%>: <%=col2%><br>
>><br>
>><%
>>        }
>>        rs.close();
>>        SQLS.close();
>>        connMgr.freeConnection("podb",Conn);
>>%>
>>
>>As you can see I did a syntax error in the query and  the error comes to
>
> the
>
>>screen as expected
>>
>>javax.servlet.ServletException: ERROR:  syntax error at or near "ITH" at
>>character 74
>>
>>I said that's weird so I tried to compare my complicated JSP files to what
>
> I
>
>>have here to see what is different (if I did something wrong)  and I found
>>this
>>
>>If I add an include at certain parts of the page - I see the result I was
>>talking about. For example if I do this:
>>
>><jsp:include page="top.html" flush="true">
>><%@ page language="java"
>>import="javax.crypto.*,java.sql.*,java.net.*,dbc.DBConnectionManager" %>
>><%^M
>>        String query = "select * from patient_info where ref_client = 38
>
> and
>
>>pat_lname like '%SM'ITH%';";
>>        DBConnectionManager connMgr;
>>        connMgr = DBConnectionManager.getInstance();
>>        Connection Conn = connMgr.getConnection("podb");
>>        Statement SQLS = Conn.createStatement();
>>        ResultSet rs = SQLS.executeQuery(query);
>>        String col1 = null;
>>        String col2 = null;
>>        while(rs.next()) {
>>                col1 = rs.getString("pat_id");
>>                col2 = rs.getString("pat_fname");
>>%>
>><%=col1%>: <%=col2%><br>
>><br>
>><%
>>        }
>>        rs.close();
>>        SQLS.close();
>>        connMgr.freeConnection("podb",Conn);
>>%>
>>
>>I get the error page as I should - however If I move the include to below
>>the <%@ page language="java".... - I get a blank page!!
>>
>>Now here is where it gets weirder - if I force a java syntax error like as
>>follows (I corrected the query):
>>
>><jsp:include page="top.html" flush="true">
>><%@ page language="java"
>>import="javax.crypto.*,java.sql.*,java.net.*,dbc.DBConnectionManager" %>
>><%^M
>>        String query = "select * from patient_info where ref_client = 38
>
> and
>
>>pat_lname like '%SMITH%';";
>>        DBConnectionManager connMgr;
>>        connMgr = DBConnectionManager.getInstance();
>>        Connection Conn = connMgr.getConnection("podb");
>>        Statement SQLS = Conn.createStatement();
>>        ResultSet rs = SQLS.executeQuery(query);
>>        String col1 = null;
>>        String col2 = null;
>>        if (col1.equals("yes") {
>>	//test
>>       }
>>        while(rs.next()) {
>>                col1 = rs.getString("pat_id");
>>                col2 = rs.getString("pat_fname");
>>%>
>><%=col1%>: <%=col2%><br>
>><br>
>><%
>>        }
>>        rs.close();
>>        SQLS.close();
>>        connMgr.freeConnection("podb",Conn);
>>%>
>>
>>An error will get thrown to the screen
>>
>>org.apache.jasper.JasperException: Unable to compile class for JSP
>>
>>An error occurred at line: 2 in the jsp file: /testdb.jsp
>>
>>/var/lib/tomcat4/work/Standalone/localhost/podims/testdb_jsp.java:57: ')'
>>expected
>>	if (col1.equals("yes") {
>>
>>However if I try to force a null pointer error by correcting my syntax
>>error - I get a blank screen! If remove the include I get the null pointer
>>error no problem. The other behaviour I noticed as well is that as I said
>>before if the include is above the <%@ page language.... piece it works
>>fine - only if its an html - if its another jsp file - I get a blank
>
> screen
>
>>as well.
>>
>>So has anyone else seen this behaviour - is there a fix or a work around -
>>should I got back to Tomcat 3?? I'm going to try your suggestion Rob and
>
> see
>
>>if that helps at all, but to me its seems like an issue with the JSP
>>compiler.
>>
>>Cheers
>>
>>Adile
>>
>
>
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