DO NOT REPLY [Bug 34426] New: - Load balancing in Tomcat

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http://issues.apache.org/bugzilla/show_bug.cgi?id=34426

           Summary: Load balancing in Tomcat
           Product: Tomcat 5
           Version: 5.0.28
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P2
         Component: Connector:AJP
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: praveen.soni@st.com
                CC: praveen.soni@st.com


Hello,

I have installed Apache 2.0.53 & Tomcat 5.0.28 with mod_jk 1.2.10 AJP connector
on  Red Hat AS 2.1 on machine A and another Tomcat 5.0.28 instance on Machine B.

And we have configured loadbalancing worker at apache level, BUT some time what
we have seen in Load Testing for 250 concurrentusers, load was distributed on
both machine A and B and some time all the request were moving on machine A only
and there were no performance gain.

here I have attached used mod_jk.properties and workers.properties configuration
, please suggest me what can be the best configuration for such scenario.

mod_jk.properties
=================
LoadModule      jk_module modules/mod_jk.so

<IfModule mod_jk.c>
    JkWorkersFile conf/workers.properties
    JkLogFile "/ora_9ias/ias/Apache-Tomcat/logs/mod_jk.log"

    JkLogLevel emerg
    # JkLogLevel error
    # JkLogLevel info

    JkMount /stonline/productcatalog/servlet/* loadbalancer
    JkMount /stonline/productcatalog/* loadbalancer
    JkMount /stonline/productcatalog/*.jsp loadbalancer

    # Deny direct access to WEB-INF and META-INF
    #
    <Location "/stonline/productcatalog/WEB-INF/*">
        AllowOverride None
        deny from all
    </Location>

    <Location "/stonline/productcatalog/META-INF/*">
        AllowOverride None
        deny from all
    </Location>
</IfModule>


workers.properties
==================
#
# workers.properties
#

#
# In Unix, we use forward slashes:
#
ps=/

#
# list the workers by name
#
worker.list=stpcqc,stpcias,loadbalancer

# ------------------------
# First tomcat server
# ------------------------
worker.stpcqc.port=10011
worker.stpcqc.host=machineA
worker.stpcqc.type=ajp13

# Specify the size of the open connection cache.
worker.stpcqc.cachesize=10

worker.stpcqc.cache_timeout=100

#
# Specifies the load balance factor when used with
# a load balancing worker.
# Note:
#  ----> lbfactor must be > 0
#  ----> Low lbfactor means less work done by the worker.
worker.stpcqc.lbfactor=50

# ------------------------
# Second tomcat server
# ------------------------
worker.stpcias.port=10022
worker.stpcias.host=machineB
worker.stpcias.type=ajp13

# Specify the size of the open connection cache.
worker.stpcias.cachesize=10

worker.stpcias.cache_timeout=100

#
# Specifies the load balance factor when used with
# a load balancing worker.
# Note:
#  ----> lbfactor must be > 0
#  ----> Low lbfactor means less work done by the worker.
worker.stpcias.lbfactor=50


# ------------------------
# Load Balancer worker
# ------------------------

#
# The loadbalancer (type lb) worker performs weighted round-robin
# load balancing with sticky sessions.
# Note:
#  ----> If a worker dies, the load balancer will check its state
#        once in a while. Until then all work is redirected to peer
#        worker.
worker.loadbalancer.type=lb
worker.loadbalancer.balanced_workers=stpcqc,stpcias
worker.loadbalancer.method=Request

#
# END workers.properties
#

Thanks & Regards,
-Praveen Soni

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