was 6.1.0.19 部署 struts2 应用，访问页面，出现如下错误：
Error 500: Filter [struts]: not a lter class
查看后台日志，异常：
web.xml 配置：
同一个 struts2 的应用，我在同一个 was 服务器上部署成功过的。于是，想
到可能是这次同事部署的时候，设置的参数不一样。
首先想到的是，检查 invokelterscompatibility，发现已经设置。如没有设
置的，参照下面的步骤：
at com. i bm. ws. webcont ai ner . l t er . WebAppFi l t erManager . doFi l t er ( WebAppFi l t er Manag
at com. i bm. ws. webcont ai ner . l t er . WebAppFi l ter Manager . doFi l t er ( WebAppFi l t er Manag
at com. i bm. ws. webcont ai ner . ser vl et . Ser vl et Wr apper . handl eRequest ( Ser vl et Wr apper . j
at com. i bm. ws. wswebcont ai ner . ser vl et . Ser vl et Wr apper . handl eRequest ( Ser vl et Wr apper
at com. i bm. wsspi . webcont ai ner . ser vl et . Gener i cSer vl et Wr apper . handl eRequest ( Gener i
at com. i bm. ws. j sp. webcont ai ner ext . Abst r act J SPExt ensi onSer vl et Wr apper . handl eReque
at com. i bm. ws. j sp. webcont ai ner ext . Abst r act J SPExt ensi onPr ocessor . handl eRequest ( Ab
at com. i bm. ws. webcont ai ner . webapp. WebApp. handl eRequest ( WebApp. j ava: 3440)
at com. i bm. ws. webcont ai ner . webapp. WebGr oup. handl eRequest ( WebGr oup. j ava: 267)
at com. i bm. ws. webcont ai ner . WebCont ai ner . handl eRequest ( WebCont ai ner . j ava: 815)
at com. i bm. ws. wswebcont ai ner . WebCont ai ner . handl eRequest ( WebCont ai ner . j ava: 1461)
at com. i bm. ws. webcont ai ner . channel . WCChannel Li nk. ready( WCChannel Li nk. j ava: 118)
at com. i bm. ws. ht t p. channel . i nbound. i mpl . Ht t pI nboundLi nk. handl eDi scri mi nat i on( Ht t
at com. i bm. ws. ht t p. channel . i nbound. i mpl . Ht t pI nboundLi nk. handl eNewI nf ormat i on( Ht t
at com. i bm. ws. ht t p. channel . i nbound. i mpl . Ht t pI nboundLi nk. r eady( Ht t pI nboundLi nk. j a
at com. i bm. ws. t cp. channel . i mpl . NewConnect i onI ni t i al ReadCal l back. sendToDi scri mi na
at com. i bm. ws. t cp. channel . i mpl . NewConnect i onI ni t i al ReadCal l back. compl et e( NewConn
< l t er >
< l t er - name>st r ut s2</ l t er - name>
< l t er - cl ass>or g. apache. st r ut s2. di spat cher . Fi l t er Di spat cher </
</ l t er >
< l t er - mappi ng>
< l t er - name>st r ut s2</ l t er - name>
<ur l - pat t er n>/ *</ ur l - pat t er n>
</ l t er - mappi ng>
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