新人求助 在action中返回逻辑视图名称的时候抛出异常 Cannot call sendError() after the response has be

[盖着被子吹风扇]

//这是action代码
public String queryAllSalChances() {

Map<String, Object> map = chanceService.find(chcCustName, chcTitle,
chcLinkman, page, nums);
salChances = getMapList(map);
return "allSalChances";//allSalChances

}
//这是struts.xml配置
<package name="salPkg" namespace="/~sale" extends="struts-default">
<!-- 销售机会管理Action -->
<action name="salChance_*" method="{1}" class="salChanceAction">
<result name="allSalChances" type="freemarker">list.html</result>
<result name="gotoAdd" type="freemarker">add.html</result>
<result name="addSalChance" type="stream">
<param name="contentType">text/html</param>
<param name="inputName">inputStream</param>
</result>
<result name="delChance" type="stream">
<param name="contentType">text/html</param>
<param name="inputName">inputStream</param>
</result>
<result name="gotoEdit" type="freemarker">edit.html</result>
<result name="edit" type="stream">
<param name="contentType">text/html</param>
<param name="inputName">inputStream</param>
</result>

</action>

<!-- 销售计划管理Action
<action name="salPlan_*" method="{1}" class="salPlanAction">
<result name="queryAllCstPlans" type="freemarker">dev.html</result>
</action> -->
</package>