Clustering Duke's Bank wtih mod_jk2
Hi,
after going through the JBOSS Tutorial and installing the Sun Duke's Bank App successfully under JBOSS 3.2.3 with Linux and JDK 1.4.2, I was curious about clustering the app.
I did a lot of things for making the app work (Load balancing with apache2/mod_jk2, etc..). But when trying to access the application with a browser with http://192.168.1.242/bank/main, I am load balanced to one of my three jboss cluster nodes in RR fashion to the URL below:
http://localhost/bank/logon;jsessionid=NqVBhizRkcvwwYowltXyaA**.server2
and then I get the following error:
Apache Tomcat/4.1.29 - Error report<!--H1{font-family : sans-serif,Arial,Tahoma;color : white;background-color : #0086b2;} H3{font-family : sans-serif,Arial,Tahoma;color : white;background-color : #0086b2;} BODY{font-family : sans-serif,Arial,Tahoma;color : black;background-color : white;} B{color : white;background-color : #0086b2;} HR{color : #0086b2;} --> <h1>HTTP Status 500 - </h1><hr size="1" noshade>type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception java.lang.IllegalArgumentException: setAttribute: Non-serializable attribute
at org.jboss.web.tomcat.session.ClusteredSession.setAttribute(ClusteredSession.java:1237)
at org.apache.catalina.session.StandardSessionFacade.setAttribute(StandardSessionFacade.java:191)
at com.sun.ebank.web.Dispatcher.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
<hr size="1" noshade><h3>Apache Tomcat/4.1.29</h3>
The error message is actually quite long, but I think that the first errors should point to the problem. I ensured that load balancing is working. The database access to the hsql database is also running. I can modify customers in the database with the java admin client of Duke's bank. I think that I have some problem maybe with HA-JNDI or HTTP Session replication. Any help would be appreciated. What follows is config files.
First I installed apache2 and mod_jk2 on one machine and tested the Load Balancing with a standalone installation of tomcat. It worked in the round robin fashion. Here is my workers2.properties file:
[logger]
level=DEBUG
[config:]
#file=/conf/workers2.properties
file=/usr/local/apache2/conf/workers2.properties
debug=5
debugEnv=0
[uriMap:]
info=Maps the requests. Options: debug
debug=0
# Alternate file logger
[logger.file:0]
level=DEBUG
file=/usr/local/apache2/logs/jk2.log
[shm:]
info=Scoreboard. Required for reconfiguration and status with multiprocess servers
file=/usr/local/apache2/logs/jk2.shm
size=10000
debug=0
disabled=0
[workerEnv:]
info=Global server options
timing=1
debug=0
# Default Native Logger (apache2 or win32 )
# can be overriden to a file logger, useful
# when tracing win32 related issues
#logger=logger.file:0
# Loadbalancer
[lb:lb]
info=Default load balancer.
debug=5
stickySession=1
# First Tomcat Instance
[channel.socket:192.168.1.30:8009]
info=Ajp13 forwarding over socket
debug=5
tomcatId=jboss01:8009
port=8009
host=192.168.1.30
disabled=0
[ajp13:192.168.1.30:8009]
channel=channel.socket:192.168.1.30:8009
group=lb
lb_factor=1
# Second Tomcat Instance
[channel.socket:192.168.1.203:8009]
info=Ajp13 forwarding over socket
debug=5
tomcatId=jboss02:8009
port=8009
host=192.168.1.203
disabled=0
[ajp13:192.168.1.203:8009]
channel=channel.socket:192.168.1.203:8009
group=lb
lb_factor=1
# Third Tomcat Instance
[channel.socket:192.168.1.242:8009]
info=Ajp13 forwarding over socket
debug=5
tomcatId=jboss01:8009
port=8009
host=192.168.1.242
disabled=0
[ajp13:192.168.1.242:8009]
channel=channel.socket:192.168.1.242:8009
group=lb
lb_factor=1
[status:]
info=Status worker, displays runtime informations
# Uri mapping
[uri:/*.jsp]
group=lb
[uri:/bank/*]
group=lb
[uri:/servlet/*]
group=lb
I used the "all" configuration as it was proposed in the JBOSS Clustering Docs. My servers find each other, UDP Multicasting is working. I can even modify the customer in Duke's bank with the provided java client. So I Think that I have some problems with HA-JNDI or HTTP Session replication. And yes, I added the clustered and distributable tags. Any help would be appreciated. You will get an account in Duke's bank with $ 1.000.000 ....
yours
Chris
