BindAuthenticator.a: Failed Authn xxx,org.springframework.ldap.CommunicationExceptio n

Hi
I am using spring3.x for ldap authentication where i am testing multiple urls for failover scenario following are my context entries. getting CommunicationException

BindAuthenticator.authenticate: Failed Authenticating [NileDi] Nilesh Dipak, caught org.springframework.ldap.CommunicationException.


<bean id="adTemplate" class="org.springframework.ldap.core.LdapTemplate" >
<constructor-arg>
<bean class="org.springframework.ldap.core.support.LdapC ontextSource">
<!-- <property name="url" value="${ldap:ad.server.url}"/> -->
<!-- <property name="urls" value="ldap://xxxx.com:389, ldap://xxx.com:389"/> -->
<property name="urls">
<list>
<value>ldap://xxx.com:389</value>
<value>ldap://xxx.com:389</value>
</list>
</property>
<property name="userDn" value="${ldap:ad.bind.dn}"/>
<property name="password" value="${ldap:ad.bind.pw}"/>
<property name="dirObjectFactory" value="org.springframework.ldap.core.support.Defau ltDirObjectFactory"/>
</bean>
</constructor-arg>
<property name="ignorePartialResultException" value="true"/>
</bean>

It got resolved
one more bean which was referencing above bean adTemplate was using parameter url which i have changed to urls and given all parameters now it is working.

<bean id="adAccessor" class="com.xxxx.xxxx.model.ldap.ADUserAccessor">
<constructor-arg ref="adTemplate"/>
<constructor-arg>
<bean class="com.xxxx.xxxx.model.ldap.ADClientContextMap per">
<constructor-arg ref="adTemplate"/>
<constructor-arg>
<bean class="com.xxx.portal.model.ldap.BindAuthenticator ">
<!--<constructor-arg value="${ldap:ad.server.url}"/> -->
<property name="urls">
<list>
<value>ldap://xxx.com:389</value>
<value>ldap://xxxx.com:389</value>
<value>ldap://xxxx.com:389</value>
</list>
</property>
</bean>
</constructor-arg>
<constructor-arg ref="clientDAO"/>
</bean>
</constructor-arg>
<constructor-arg value="${ldap:ad.user.search.base}"/>
<constructor-arg value="${ldap:ad.user.filter}"/>
</bean>