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From Alistair Hopkins <>
Subject Re: Strange Request behavior with Apache/Tomcat and IE
Date Fri, 22 Sep 2000 08:01:50 GMT
I have been tracing where our problem comes from and it is now looking as 
if it may be a database/jdbc issue:

I'm getting an erratic "SQLException: the query returned no data" from the 
jdbc2.executeQuery method.

I'm using Postgres 7.02 & the jdbc driver.


At 09:58 AM 9/22/00 +0200, you wrote:
>thanks for your answer,
> >We have noticed very similar behaviour in the last few days, which
> >coincidentally was after I'd been setting up the DNS.
> >Does IE perhaps cache DNS lookups but ignore the time to live (ttl)?
> >If you clear the cache will the problem go away?
>no, to make clear whats happen during a Session, i describe a
>typically sequence.
>log in thru a request -> ok
>view some pages (served by our servlet) -> ok (the service method
>makes a output (e.g. "service start")
>view another page -> error (no output)
>hit the back button & try to view the page again -> error (no output)
>hit the back button & try to view the page again -> ok (output ok).
>sometimes i can work with our application for an hour and everything
>seems ok, sometimes the problem occurs every two minutes.
>as i pointed out, the next thing that i do not understand is the
>different behavior of our intranet-server (ie displays an dns-error?),
>and the behavior of the internet-server, which is set up (hopefully ;-))
>by a prof. admin (ie displays empty pages).
>i try to install the tomcat beta and the "old"-jserv today.
>i attach the following conf-files, perhaps someone solves the problem.
><**** apache-tomcat.conf>
>LoadModule jserv_module /usr/lib/apache/
>ApJServManual On
>ApJServDefaultProtocol ajpv12
>ApJServSecretKey DISABLED
>ApJServMountCopy on
>ApJServLogLevel notice
>ApJServDefaultPort 8007
>#AddType test/jsp .jsp
>#AddHandler jserv-servlet .jsp
>Alias /eumc /opt/tomcat/webapps/eumc
><Directory "/opt/tomcat/webapps/eumc">
>     Options Indexes FollowSymLinks
>ApJServMount /eumc/servlet /eumc
><Location /eumc/WEB-INF/ >
>     AllowOverride None
>     deny from all
>ApJServMount /servlet /ROOT
><**** apache-tomcat.conf>
>thanks in advance
> >>Hi,
> >>
> >>Sometimes we encounter a strange behavior with the
> >>combination of Apache (1.3.12) /tomcat(3.1)/ms ie.
> >>(On Linux 6.4, self-compiled jserv_mod)
> >>When the Browser makes a get or post request to the
> >>servlet (which 'only' implements the 'service' method,
> >>but i think that does not matter) we get either an
> >>DNS-Error? (Intranet) or an empty page (Internet).
> >>We've never (think so) observed this behavior
> >>with netscape or opera.
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