Tomcat Clustering Series Part 3 : Session Replication

In this video we are going to discuss the how to setup session replication in tomcat clustering environment. Session replication makes High availability and full fail-over capability to our clustering environment
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[@TheUtubesekar]

Very well organized tutorial and very detailed. Thank you very much Mr. Ramki!

[@RamakrishnnanEP]

Thanks 😊

[@premanandramnath]

awesome explanation & walk through.. thanks a lot Ramki

[@RamakrishnnanEP]

Thanks :-)

[@karnifazil]

Rama, thank you very much for sharing this video. Its very informative. I have a follow up question. Is it possible to use apache as workers instead of tomcat? the reason is below every worker I want to have another level of workers. If yes please point me to the documentation.

[@santoshharne5763]

Really appreciate you that way you are presenting. I just want to know that same steps will work for tomcat9 ?

[@RamakrishnnanEP]

mostly working. check tomcat9 docs

[@ashwiniravikumar314]

Hi Ramki,
I have been watching your videos.
We have Tomcat 9 with 2 nodes and session replication does not work.
Could you please share the steps that I need to follow to set up session replication on Tomcat 9?

[@sumitbhawsar4147]

Excellent Tutorial RamiK. Thank you very much

[@RamakrishnnanEP]

Thanks :-)

[@natarajannkl2003]

HI Rama Krishnan,
very Good explanation, thank you so much.
if any video is available for Jboss clustering.

[@jagannadhkoka]

hi watched the vedio i alredy enabled the cluster by seeing the tomcat cluster documentation but some times i am getting errors like no faulty members found. while starting the tomcat instances

[@SoftwareSimplified-Dtons]

I have one doubt do you have any idea how to distribute the load in Autosys?

[@RamakrishnnanEP]

U need to add route line irrespective of ur IP address. because multicast address is class D address range. (224.0.0.0 to 239.255.255.255). so u should select this address range only.
so the route line command common for all IP address

[@davidchang5862]

Tomcat is definitely one of the best and easiest J2EE App Server/Container to use
compared to other products like Weblogic and Websphere. And furthermore it is free of charge unlike the 2 so-called enterprise products above that come with a ridiculous price tag to put someone into COMA.

[@abhineshkumar3667]

As Working with Tomcat 9 on windows machine multiple tomcat on single machine. Not replicating session. How to debug? Will this work on windows machine . Also getting error for org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener. Class not found exception. Please do help.

[@RamakrishnnanEP]

r u put distributable tag inside web.xml file?
please elaborate the problem? what u did and which step is showing problem?

[@SoftwareSimplified-Dtons]

Hi Rama ,Firstly Thanks for the great explanation in Part One and Part Two In this Part 3 i have one doubt can you
please tell me how to enable Multicasting for Windows at 7:33
Thank you in advance

[@RamakrishnnanEP]

it may already enabled. download multicast java sample from Internet. verify it

[@SoftwareSimplified-Dtons]

ok Thank you Ram Thnaks alot :-)

[@SoftwareSimplified-Dtons]

Ram one doubt is if i have restful webservices deployed as war in tomcat instances and ui in apache webserver can i use the clustering from same apache webserver with all above part1 configurations?
2.)also please tell me does webservices need sticky sessions and session replication configured ?

[@RamakrishnnanEP]

+Dhana Shekar yes u can make static pages come from httpd and dynamic content come from tomcat. make proper rules

[@SoftwareSimplified-Dtons]

ok Thank you still i have some doubts Thank you once again Ram,

[@venkaizen]

Rama - were you able to test session replication on tomcat version 8 clustering using mod_jk ?

[@jagannadhkoka]

i am having doubt about one line in you post
route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0
can u please give me a example with my ip and netmask
ip is 192.168.3.10
netmask is 255.255.255.0

[@sudarshanreddye7662]

whenever I am doing this not able to add tomcat server into eclipse.its showing there is no conf file.how can i resolve

[@durairajt8014]

good one

[@SoftwareSimplified-Dtons]

Thank you Rama
Great!

[@VijayIT_Hub]

I search alot of videos on this cluserting concept.
No one given this much info.. Hatsoff to you sir.. Can I have your mail I'd .. To discuss something with you.

[@RamakrishnnanEP]

[e-mail]

[@marcf1197]

Rama, I have this configured usin Members instead multicast, but it's not runing fine. Particularly when a tomcat shut down because the machine stop running.
In that case I had some errors in log like "No route to host", bla, bla. Do you have that case as an example? A mean, using StaticMembershipInterceptor as an interceptor instead Multicast! How could I contact you? Warm regards, Marcelo

[@RamakrishnnanEP]

No route to host errors are coming when giving hostname for static member but network not able to connect it. check with ping. r u able to ping the hosts based on hostname or not

[@RamakrishnnanEP]

hi can u provide ur server.xml file. i want check ur configuration

[@epsalimep]

Hi . could you send one sample server.xml file . for me always getting class not found exception while starting tomcat

[@RamakrishnnanEP]

github.com/ramkicse/tomcat-clustering-session-replication-/blob/master/instance-1/conf/server.xml

[@epsalimep]

Thanks man much appreciated

[@mohosra]

Very GOOD

[@drgr33nUK]

Great videos !! But still can't understand a word your saying lol

[@RamakrishnnanEP]

+Zarren Spry :-)

[@TheBestDieEarly]

on my machines only the SessionID and attributes are replicated, but not the values. What does that mean?
Are you planning a new tutorial with Tomcat 8 ++

[@RamakrishnnanEP]

:-)