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From David Smith <>
Subject Re: [REPOST] Tomcat 5.5.15 - HTTPS hanging and intermittent "Page Cannot be Displayed" problems
Date Mon, 03 Apr 2006 18:09:01 GMT
Given you've indicated all the headaches occurred in the move from 5.5.9
to 5.5.15, you might want to take a look at the change log in relation
to your environment.  Are your connectors configured the same
(acceptCount, maxThreads)?

Beyond that, issue 1 implies something else may be causing issues on the
network and interfering with your server's operation -- especially when
you can't reproduce it at any other time.  Maybe something is causing
high traffic to the point of denial of service.  Do any other services
have issues with dropped connection or delayed response during the same


Richard Mundell wrote:

>Apologies for the repost but I sent this last week but didn't get any
>replies. In the hope that the people with the answers on this might've
>missed it, I'm trying again... ;-)
>  _____  
>From: Richard Mundell [] 
>Sent: Friday, March 31, 2006 11:33 AM
>To: ''
>Subject: Tomcat 5.5.15 - HTTPS hanging and intermittent "Page Cannot be
>Displayed" problems
>We upgraded our internet-facing web server from Tomcat 5.5.9 to 5.5.15 this
>weekend and have run into a number of intermittent connectivity problems
>which have resulted in rolling back to 5.5.9.
>We use the Tomcat HTTPS connector (without an intermediate web server
>between the clients and Tomcat) with all of the default configuration.
>Issue 1: A couple of our clients have experienced intermittent connectivity
>problems (where approximately 1 out of every 20 page loads results in an
>immediate "Page Cannot Be Displayed" error in Internet Explorer - it appears
>that Tomcat immediately rejects the connection).
>Issue 2: Also, during peak loading (although we're only talking about 30 to
>40 concurrent users here) Tomcat appears to hang for a while and make new
>connections wait for up to 1 minute before returning a page. 
>Throughout this time processor load has been consistently < 20%. (The server
>is a dual Xeon processor, dual core machine, running Windows 2003 Server).
>The first problem we've seen before when we used to use Apache (with the JK
>connector) to deliver the HTTPS pages - I suspect the compatibility with
>Apache/OpenSSL's implementation of SSL and Internet Explorer's
>implementation of SSL are still slightly incompatible. (I believe this is a
>known issue on a Windows platform but has never been resolved). The second
>problem (with Tomcat not responding to new HTTPS requests quickly under
>moderate load) is new on me.
>I'm not really able to submit this as a bug to the Tomcat team as
>out-of-hours we've been unable to recreate this (even simulating a high load
>using JMeter), and the "Page Cannot Be Displayed" issue only occurs with
>certain brands of proxy server (Secure Computing's Sidewinder seems
>particuiarly sensitive to this). Also, there's no errors   
>The only conclusion I can draw right now is that if you want to use Tomcat
>to deliver HTTPS content from a Windows-based server, stick with Tomcat
>Has anyone else had a similar experience?
>Richard Mundell
>The Roberts Group
>Market Data Expertise that FITS.
>+1 212 499 2680 x20 (office)

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