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Posted to users@tomcat.apache.org by Michael Remme <mr...@braintags.de> on 2001/12/16 02:46:36 UTC
tom4 session and loadbalancing
mod_jk is running here now with tomcat 4, but i have the problem, that
running sessions are not recognized. The loadbalancer is sending the
requests to different servers and not, like described, back to the
session-host. Is there anything know, what to do?
Best, Michael
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Re: tom4 session and loadbalancing / Distributed Session Management
Posted by Tom Drake <rt...@pobox.com>.
Michael:
I've been focusing on finding paid work, however, the Tomcat side
of things is pretty much done. What remains is:
- Completion of Valve (that notifies session manager when a request
is complete). Craig tells me the code for this needs a little work, and
I'm waiting for him to provide some more details about this.
- Session ID mangling.
- Apache Connector changes - No action has occurred on this,
I'm dependant on someone else making these changes. I'm hoping
that Costin will do this when he's done with the 4.02 release work
- Final integration and testing
Note. The 'session' locking feature that I added is probably not necessary
as long as server / session affinity is in place. This should either be
disabled
or made 'optional'.
Lastly, I got to thinking that it should be possible to have a Tomcat only
load balancing / fail-over solution. What's needed is a Tomcat front-end
on which is deployed a new servlet that would do a simple round-robin
load-balancing, but when jsessionid's are present, route them to the
session host only, unless the session host doesn't respond, in which case
it should be re-routed to another available instance.
So, I started writing some code to do this, and then got side-tracked
looking
for work again. Nasty things, bills.
I'm still plugging away, however,
Tom
----- Original Message -----
From: "Michael Remme" <mr...@braintags.de>
To: "Tomcat Users List" <to...@jakarta.apache.org>
Sent: Wednesday, January 09, 2002 12:04 AM
Subject: AW: tom4 session and loadbalancing / Distributed Session Management
| Hi Tom,
|
| anything new about this theme?
|
| Best, Michael
|
| > -----Ursprüngliche Nachricht-----
| > Von: Tom Drake [mailto:rtd@pobox.com]
| > Gesendet: Sonntag, 16. Dezember 2001 17:02
| > An: Tomcat Users List
| > Cc: Tomcat Dev List
| > Betreff: Re: tom4 session and loadbalancing / Distributed Session
| > Management
| >
| >
| > Michael:
| >
| > As it happens, I am currently working on a solution to this problem.
| > Look for messages in the archive with 'Distributed Session
| > Management' in the subject.
| >
| > In a nutshell, all tomcat instances in a 'cluster' will be able to share
| > session data.
| >
| > I've already completed a multicast-style RMI registry that allows
| > all instances in the cluster to easily discover each other. I'm
currently
| > working the kinks out of the distributed session/object management
| > bits. When this is done (should be done in a day or two), all that's
| > left is to integrate it into Tomcat.
| >
| > In short, the distributed session management feature is nearing
| > completion.
| >
| > I'm creating pretty comprehensive JUnit tests along with this code, so
my
| > confidence level will be high that this feature really does work when I
| > hand it off.
| >
| > Tom Drake
| >
| > P.S. I'm cross-posting to the dev list because I think that the
developers
| > will
| > probably be interested in this as well.
| >
| >
| > ----- Original Message -----
| > From: "Michael Remme" <mr...@braintags.de>
| > To: "Tomcat Users List" <to...@jakarta.apache.org>
| > Sent: Saturday, December 15, 2001 5:46 PM
| > Subject: tom4 session and loadbalancing
| >
| >
| > | mod_jk is running here now with tomcat 4, but i have the problem, that
| > | running sessions are not recognized. The loadbalancer is sending the
| > | requests to different servers and not, like described, back to the
| > | session-host. Is there anything know, what to do?
| > |
| > | Best, Michael
| > |
| > | Virengepruft vom G DATA AntiVirenKit
| > |
| > |
| > | --
| > | To unsubscribe: <ma...@jakarta.apache.org>
| > | For additional commands: <ma...@jakarta.apache.org>
| > | Troubles with the list: <ma...@jakarta.apache.org>
| > |
| > |
| > |
| >
| >
| > --
| > To unsubscribe: <ma...@jakarta.apache.org>
| > For additional commands: <ma...@jakarta.apache.org>
| > Troubles with the list: <ma...@jakarta.apache.org>
| >
| >
|
| Virengeprüft vom G DATA AntiVirenKit
|
|
| --
| To unsubscribe: <ma...@jakarta.apache.org>
| For additional commands: <ma...@jakarta.apache.org>
| Troubles with the list: <ma...@jakarta.apache.org>
|
|
|
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AW: tom4 session and loadbalancing / Distributed Session Management
Posted by Michael Remme <mr...@braintags.de>.
Hi Tom,
anything new about this theme?
Best, Michael
> -----Ursprüngliche Nachricht-----
> Von: Tom Drake [mailto:rtd@pobox.com]
> Gesendet: Sonntag, 16. Dezember 2001 17:02
> An: Tomcat Users List
> Cc: Tomcat Dev List
> Betreff: Re: tom4 session and loadbalancing / Distributed Session
> Management
>
>
> Michael:
>
> As it happens, I am currently working on a solution to this problem.
> Look for messages in the archive with 'Distributed Session
> Management' in the subject.
>
> In a nutshell, all tomcat instances in a 'cluster' will be able to share
> session data.
>
> I've already completed a multicast-style RMI registry that allows
> all instances in the cluster to easily discover each other. I'm currently
> working the kinks out of the distributed session/object management
> bits. When this is done (should be done in a day or two), all that's
> left is to integrate it into Tomcat.
>
> In short, the distributed session management feature is nearing
> completion.
>
> I'm creating pretty comprehensive JUnit tests along with this code, so my
> confidence level will be high that this feature really does work when I
> hand it off.
>
> Tom Drake
>
> P.S. I'm cross-posting to the dev list because I think that the developers
> will
> probably be interested in this as well.
>
>
> ----- Original Message -----
> From: "Michael Remme" <mr...@braintags.de>
> To: "Tomcat Users List" <to...@jakarta.apache.org>
> Sent: Saturday, December 15, 2001 5:46 PM
> Subject: tom4 session and loadbalancing
>
>
> | mod_jk is running here now with tomcat 4, but i have the problem, that
> | running sessions are not recognized. The loadbalancer is sending the
> | requests to different servers and not, like described, back to the
> | session-host. Is there anything know, what to do?
> |
> | Best, Michael
> |
> | Virengepruft vom G DATA AntiVirenKit
> |
> |
> | --
> | To unsubscribe: <ma...@jakarta.apache.org>
> | For additional commands: <ma...@jakarta.apache.org>
> | Troubles with the list: <ma...@jakarta.apache.org>
> |
> |
> |
>
>
> --
> To unsubscribe: <ma...@jakarta.apache.org>
> For additional commands: <ma...@jakarta.apache.org>
> Troubles with the list: <ma...@jakarta.apache.org>
>
>
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AW: tom4 session and loadbalancing / Distributed Session Management
Posted by Michael Remme <mr...@braintags.de>.
Tom, i love you :-)
and by the way my wife, too, since the last nights i was sitting til 5 in
front of several PCs and after ...
michael
-----Ursprüngliche Nachricht-----
Von: Tom Drake [mailto:rtd@pobox.com]
Gesendet: Sonntag, 16. Dezember 2001 17:02
An: Tomcat Users List
Cc: Tomcat Dev List
Betreff: Re: tom4 session and loadbalancing / Distributed Session
Management
Michael:
As it happens, I am currently working on a solution to this problem.
Look for messages in the archive with 'Distributed Session
Management' in the subject.
In a nutshell, all tomcat instances in a 'cluster' will be able to share
session data.
I've already completed a multicast-style RMI registry that allows
all instances in the cluster to easily discover each other. I'm currently
working the kinks out of the distributed session/object management
bits. When this is done (should be done in a day or two), all that's
left is to integrate it into Tomcat.
In short, the distributed session management feature is nearing completion.
I'm creating pretty comprehensive JUnit tests along with this code, so my
confidence level will be high that this feature really does work when I
hand it off.
Tom Drake
P.S. I'm cross-posting to the dev list because I think that the developers
will
probably be interested in this as well.
----- Original Message -----
From: "Michael Remme" <mr...@braintags.de>
To: "Tomcat Users List" <to...@jakarta.apache.org>
Sent: Saturday, December 15, 2001 5:46 PM
Subject: tom4 session and loadbalancing
| mod_jk is running here now with tomcat 4, but i have the problem, that
| running sessions are not recognized. The loadbalancer is sending the
| requests to different servers and not, like described, back to the
| session-host. Is there anything know, what to do?
|
| Best, Michael
|
| Virengepruft vom G DATA AntiVirenKit
|
|
| --
| To unsubscribe: <ma...@jakarta.apache.org>
| For additional commands: <ma...@jakarta.apache.org>
| Troubles with the list: <ma...@jakarta.apache.org>
|
|
|
--
To unsubscribe: <ma...@jakarta.apache.org>
For additional commands: <ma...@jakarta.apache.org>
Troubles with the list: <ma...@jakarta.apache.org>
Virengeprüft vom G DATA AntiVirenKit
--
To unsubscribe: <ma...@jakarta.apache.org>
For additional commands: <ma...@jakarta.apache.org>
Troubles with the list: <ma...@jakarta.apache.org>
Re: tom4 session and loadbalancing / Distributed Session Management
Posted by Tom Drake <rt...@pobox.com>.
Michael:
As it happens, I am currently working on a solution to this problem.
Look for messages in the archive with 'Distributed Session
Management' in the subject.
In a nutshell, all tomcat instances in a 'cluster' will be able to share
session data.
I've already completed a multicast-style RMI registry that allows
all instances in the cluster to easily discover each other. I'm currently
working the kinks out of the distributed session/object management
bits. When this is done (should be done in a day or two), all that's
left is to integrate it into Tomcat.
In short, the distributed session management feature is nearing completion.
I'm creating pretty comprehensive JUnit tests along with this code, so my
confidence level will be high that this feature really does work when I
hand it off.
Tom Drake
P.S. I'm cross-posting to the dev list because I think that the developers
will
probably be interested in this as well.
----- Original Message -----
From: "Michael Remme" <mr...@braintags.de>
To: "Tomcat Users List" <to...@jakarta.apache.org>
Sent: Saturday, December 15, 2001 5:46 PM
Subject: tom4 session and loadbalancing
| mod_jk is running here now with tomcat 4, but i have the problem, that
| running sessions are not recognized. The loadbalancer is sending the
| requests to different servers and not, like described, back to the
| session-host. Is there anything know, what to do?
|
| Best, Michael
|
| Virengepruft vom G DATA AntiVirenKit
|
|
| --
| To unsubscribe: <ma...@jakarta.apache.org>
| For additional commands: <ma...@jakarta.apache.org>
| Troubles with the list: <ma...@jakarta.apache.org>
|
|
|
--
To unsubscribe, e-mail: <ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>
Re: tom4 session and loadbalancing / Distributed Session Management
Posted by Tom Drake <rt...@pobox.com>.
Michael:
As it happens, I am currently working on a solution to this problem.
Look for messages in the archive with 'Distributed Session
Management' in the subject.
In a nutshell, all tomcat instances in a 'cluster' will be able to share
session data.
I've already completed a multicast-style RMI registry that allows
all instances in the cluster to easily discover each other. I'm currently
working the kinks out of the distributed session/object management
bits. When this is done (should be done in a day or two), all that's
left is to integrate it into Tomcat.
In short, the distributed session management feature is nearing completion.
I'm creating pretty comprehensive JUnit tests along with this code, so my
confidence level will be high that this feature really does work when I
hand it off.
Tom Drake
P.S. I'm cross-posting to the dev list because I think that the developers
will
probably be interested in this as well.
----- Original Message -----
From: "Michael Remme" <mr...@braintags.de>
To: "Tomcat Users List" <to...@jakarta.apache.org>
Sent: Saturday, December 15, 2001 5:46 PM
Subject: tom4 session and loadbalancing
| mod_jk is running here now with tomcat 4, but i have the problem, that
| running sessions are not recognized. The loadbalancer is sending the
| requests to different servers and not, like described, back to the
| session-host. Is there anything know, what to do?
|
| Best, Michael
|
| Virengepruft vom G DATA AntiVirenKit
|
|
| --
| To unsubscribe: <ma...@jakarta.apache.org>
| For additional commands: <ma...@jakarta.apache.org>
| Troubles with the list: <ma...@jakarta.apache.org>
|
|
|
--
To unsubscribe: <ma...@jakarta.apache.org>
For additional commands: <ma...@jakarta.apache.org>
Troubles with the list: <ma...@jakarta.apache.org>