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From "Hensley, Richard" <Richard.Hens...@McKesson.com>
Subject RE: HiveMind filter timing question
Date Thu, 11 Nov 2004 21:47:33 GMT
After puzzling around with, I think the timing is this:

1. User enters "catalina.sh stop"
2. tomcat starts it shutdown process by gracefully stopping all the web
applications 
3. tomcat then serializes all the sessions for the web applications

The problem is that when the web application shuts down, the HiveMind filter
is also shutdown, which shuts the registry down. 

The serialization process tries to get a service from the registry, which
throws a registry shutdown exception.

Does this make any sense?

I'm also trying to figure out the timing for the startup sequence, but
haven't nailed it yet. I will report back when I know more.

Richard

-----Original Message-----
From: James Carman [mailto:james@carmanconsulting.com] 
Sent: Thursday, November 11, 2004 1:23 PM
To: hivemind-user@jakarta.apache.org
Subject: RE: HiveMind filter timing question


What exactly are you trying to do?  When exactly are you trying to use the
serialization/deserialization service which is managed by HiveMind?  

-----Original Message-----
From: Hensley, Richard [mailto:Richard.Hensley@McKesson.com] 
Sent: Thursday, November 11, 2004 1:42 PM
To: 'hivemind-user@jakarta.apache.org'
Subject: HiveMind filter timing question

We are using the hivemind filter in our application. One of the HiveMind
services is used for interaction with the database. This service is used
during serialization and deserialization of database persistent objects. We
are using Tomcat which will serialize and deserialize sessions during a
normal restart. What we have discovered is that HiveMind is not available
because the filter has been shutdown by the time that Tomcat serializes the
session. We still don't know, but we suspect, that HiveMind won't be
available by the time that Tomcat deserializes the sessions.

Does anybody have any suggestions?

Our only thought was to use a different filter that is not responsible for
building the registry, but is responsible for thread clean up stuff. This
suffers from application reload issues, which are currently handled by the
filter.

Help!!!

Richard


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