从WAS7 / Java6迁移到WASv9 / Java8后，MyFaces / JSF2.0（xhtml）页面引发错误500。请帮忙。预先感谢。
浏览器错误：
Error Page Exception
SRVE0260E: The server cannot use the error page specified for your application to handle the Original Exception printed below.
原始异常：
Error Message: java.lang.NullPointerException
Error Code: 500
Target Servlet: Faces Servlet
Error Stack:
java.lang.NullPointerException
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.getFilterChainContents(WebAppFilterManager.java:777)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.getFilterChain(WebAppFilterManager.java:373)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:933)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1109)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:4112)
at com.ibm.ws.webcontainer.webapp.WebAppImpl.handleRequest(WebAppImpl.java:2171)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:304)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1028)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1817)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:294)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:532)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:318)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:289)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.determineNextChannel(SSLConnectionLink.java:1084)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink$MyReadCompletedCallback.complete(SSLConnectionLink.java:658)
at com.ibm.ws.ssl.channel.impl.SSLReadServiceContext$SSLReadCompletedCallback.complete(SSLReadServiceContext.java:1820)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:175)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1892)
控制台错误：
[3/28/19 1:44:35:231 IST] 0000015f LocalTranCoor E WLTC0017E: Resources rolled back due to setRollbackOnly() being called.
[3/28/19 1:44:35:233 IST] 0000015f webapp E com.ibm.ws.webcontainer.webapp.WebApp logServletError SRVE0293E: [Servlet Error]-[Faces Servlet]: java.lang.NullPointerException
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.getFilterChainContents(WebAppFilterManager.java:777)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.getFilterChain(WebAppFilterManager.java:373)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:933)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1109)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:4112)
at com.ibm.ws.webcontainer.webapp.WebAppImpl.handleRequest(WebAppImpl.java:2171)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:304)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1028)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1817)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:294)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:532)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:318)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:289)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.determineNextChannel(SSLConnectionLink.java:1084)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink$MyReadCompletedCallback.complete(SSLConnectionLink.java:658)
at com.ibm.ws.ssl.channel.impl.SSLReadServiceContext$SSLReadCompletedCallback.complete(SSLReadServiceContext.java:1820)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:175)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1892)
[3/28/19 1:44:35:234 IST] 0000015f LocalTranCoor E WLTC0017E: Resources rolled back due to setRollbackOnly() being called.
[3/28/19 1:44:35:234 IST] 0000015f webapp E com.ibm.ws.webcontainer.webapp.WebApp reportRecursiveError Error Page Exception: