Looks like if we refresh multiple fields on a field's value changes, it causes stacktrace (http://pastebin.com/x579AzU8). I guess it might be related to multiple ajax call at the same time but not exactly sure though. Please let me know if we need to create a jira for this issue.

Here is the definition
<bean id="KS-Catalog-AddFormatOffering" parent="Uif-HorizontalBoxSection" p:render="@

">
<property name="disclosure.render" value="false"/>
<property name="items">
<list>
<bean parent="Uif-InputField-LabelTop" p:propertyName="addLineFormatWrapper.formatId" p:required="true" p:label="FORMAT" p:forceSessionPersistence="true">
<property name="control">
<bean parent="Uif-DropdownControl">
<property name="cssClasses">
<list merge="true">
<value>ignoreValid</value>
</list>
</property>
</bean>
</property>
<property name="optionsFinder">
<bean class="org.kuali.student.enrollment.class2.courseoffering.keyvalue.FormatOfferingTypeForCreateCOTypeKeyValues" p:addBlankOption="false"/>
</property>
</bean>

<bean parent="Uif-InputField-LabelTop" p:propertyName="addLineFormatWrapper.gradeRosterLevelTypeKey" p:refreshWhenChangedPropertyNames="#dp.addLineFormatWrapper.formatId" p:forceSessionPersistence="true"
p:label="GRADE ROSTER LEVEL" p:required="true" p:finalizeMethodToCall="populateGradeRosterLevelTypes">
<property name="control">
<bean parent="Uif-DropdownControl"/>
</property>
</bean>
<bean parent="Uif-InputField-LabelTop" p:propertyName="addLineFormatWrapper.finalExamLevelTypeKey" p:refreshWhenChangedPropertyNames="#dp.addLineFormatWrapper.formatId" p:forceSessionPersistence="true"
p:label="FINAL EXAM DRIVER ACTIVITY" p:required="true" p:finalizeMethodToCall="populateFinalExamDriverTypes">
<property name="control">
<bean parent="Uif-DropdownControl"/>
</property>
</bean>

</list>
</property>
</bean>