geoserver发布地图报错

[piaoxiangjijie]

code="internal error" org.vfny.geoserver.wmsException:
Rendering process failed
Rendering process failed
Error rendering feature
Argument "value" should not be null

<Rule>
<ogc:Filter>
<ogc:PropertyIsEqualTo>
<ogc:PropertyName>type</ogc:PropertyName>
<ogc:Literal>0</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:Filter>

<PointSymbolizer>
<Graphic>
<ExternalGraphic>
<OnlineResource xlink:type="simple" xlink:href="91.gif" />
<Format>image/gif</Format>
</ExternalGraphic>
<Size><ogc:Literal>15</ogc:Literal></Size>
</Graphic>
</PointSymbolizer>
<TextSymbolizer>
<Label>
<ogc:PropertyName>name</ogc:PropertyName>
</Label>
<Font>
<CssParameter name="font-family">宋体</CssParameter>
<CssParameter name="font-style">Normal</CssParameter>
<CssParameter name="font-size">12</CssParameter>
</Font>
<LabelPlacement>
<PointPlacement>
<AnchorPoint>
<AnchorPointX>0.5</AnchorPointX>
<AnchorPointY>0.5</AnchorPointY>
</AnchorPoint>
<Displacement>
<DisplacementX>0</DisplacementX>
<DisplacementY>-15</DisplacementY>
</Displacement>
</PointPlacement>
</LabelPlacement>

</TextSymbolizer>

</Rule>
翻译了一下，说是渲染错误，我感觉没错啊，不知怎么改,

[暖枫无敌]

输入参数value你没有提供值，为null，报错了