[Carbon-dev] Dynamic Load Balancing to a Cluster via ESB

[Güçlü Akkaya]

Hi,

i have a web service an the wso2 as and want requests to this service to be 
distributed in a stateful manner and i do not want to give the name of the 
endpoints hard coded. So my only choice is load balancing.
Here is my synapse configuration:


<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://ws.apache.org/ns/synapse";>
    <registry provider="org.wso2.carbon.mediation.registry.WSO2Registry">
        <parameter 
name="extensions">org.wso2.carbon.discovery.mediation.ext.WSDiscoveryRegistryExtension</parameter>
        <parameter 
name="discoveryProxy">https://discovery-governance-arcsp.ardich.com:9443/services/DiscoveryProxy</parameter>
        <parameter name="cachableDuration">15000</parameter>
    </registry>
    <proxy name="DynamicWSStorageService" startOnLoad="true" trace="disable">
        <target 
endpoint="wsdd://urn:uuid:5552ccce-b0e7-4aef-96ee-dcd254b31c84/https">
            <outSequence>
                <send/>
            </outSequence>
        </target>
        <policy 
key="conf:/repository/axis2/service-groups/DynamicWSStorageService/services/DynamicWSStorageService/policies/WSO2CachingPolicy"/>
    </proxy>
    <proxy name="DynamicAuthenticationAdmin" startOnLoad="true" trace="disable">
        <target 
endpoint="wsdd://urn:uuid:e84bfadf-beb3-4412-b908-b8b9f6e411f1/https">
            <outSequence>
                <send/>
            </outSequence>
        </target>
    </proxy>
    <sequence name="fault">
        <log level="full">
            <property name="MESSAGE" value="Executing default 'fault' 
sequence"/>
            <property name="ERROR_CODE" 
expression="get-property('ERROR_CODE')"/>
            <property name="ERROR_MESSAGE" 
expression="get-property('ERROR_MESSAGE')"/>
        </log>
        <drop/>
    </sequence>
    <sequence name="main">
        <in>
            <log level="full"/>
            <send>
                <endpoint name="manager-storage-arcsp.ardich.com">
                    <dynamicLoadbalance 
algorithm="org.apache.synapse.endpoints.algorithms.RoundRobin">
                        <membershipHandler 
class="org.apache.synapse.core.axis2.Axis2LoadBalanceMembershipHandler">
                            <property name="applicationDomain" 
value="arcsp.storage.domain"/>
                        </membershipHandler>
                    </dynamicLoadbalance>
                </endpoint>
            </send>
        </in>
        <out>
            <send/>
        </out>
    </sequence>
</definitions>


I can successfully save the configuration on the ESB. But when i try to make a 
request to the proxy web services (DynamicAuthenticationAdmin and 
DynamicWSStorage) ESB gives following error:

TID: [] [WSO2 Stratos Internal Enterprise Service Bus] [2012-01-13 
14:51:29,604] ERROR {org.apache.synapse.endpoints.EndpointContext} -  For 
proper clustered mode operation, all endpoints should be uniquely named 
{org.apache.synapse.endpoints.EndpointContext}


What have done wrong on the synapse configuration?

Thanks


Fatih Güçlü Akkaya

Software Development Engineer
 






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