Error when re-indexing

[GWCwebdev]

On Railo 4.2.1.008 final + Mura 6.2.6413 I get the following error when trying to re-index. It's not clear what the error is or how to fix it... any ideas what has gone wrong?

500 Error
org.apache.poi.poifs.filesystem.POIFSFileSystem.getRoot()Lorg/apache/poi/poifs/filesystem/DirectoryEntry;
Code: 0
Type: 0

org.apache.poi.poifs.filesystem.POIFSFileSystem.getRoot()Lorg/apache/poi/poifs/filesystem/DirectoryEntry;
at org.textmining.text.extraction.WordExtractor.extractText(WordExtractor.java:51):51
at railo.runtime.search.lucene2.docs.WordDocument.addContent(WordDocument.java:64):64
at railo.runtime.search.lucene2.docs.WordDocument.getDocument(WordDocument.java:43):43
at railo.runtime.search.lucene2.DocumentUtil.toDocument(DocumentUtil.java:133):133
at railo.runtime.search.lucene2.LuceneSearchCollection._index(LuceneSearchCollection.java:748):748
at railo.runtime.search.lucene2.LuceneSearchCollection._list(LuceneSearchCollection.java:730):730
at railo.runtime.search.lucene2.LuceneSearchCollection._list(LuceneSearchCollection.java:723):723
at railo.runtime.search.lucene2.LuceneSearchCollection._indexPath(LuceneSearchCollection.java:165):165
at railo.runtime.search.SearchCollectionSupport.indexPath(SearchCollectionSupport.java:303):303
at railo.runtime.search.SearchCollectionSupport.index(SearchCollectionSupport.java:178):178
at railo.runtime.tag.Index.doUpdate(Index.java:461):461
at railo.runtime.tag.Index.doStartTag(Index.java:363):363
at solr.lib.collectionservice_cfc$cf.udfCall1(/srv/www/htdocs/plugins/solr/lib/collectionService.cfc:173):173
at solr.lib.collectionservice_cfc$cf.udfCall(/srv/www/htdocs/plugins/solr/lib/collectionService.cfc):-1
at railo.runtime.type.UDFImpl.implementation(UDFImpl.java:93):93
at railo.runtime.type.UDFImpl._call(UDFImpl.java:307):307
at railo.runtime.type.UDFImpl.call(UDFImpl.java:208):208
at railo.runtime.type.scope.UndefinedImpl.call(UndefinedImpl.java:748):748
at railo.runtime.util.VariableUtilImpl.callFunctionWithoutNamedValues(VariableUtilImpl.java:724):724
at railo.runtime.PageContextImpl.getFunction(PageContextImpl.java:1547):1547
at solr.lib.collectionservice_cfc$cf.udfCall2(/srv/www/htdocs/plugins/solr/lib/collectionService.cfc:220):220
at solr.lib.collectionservice_cfc$cf.udfCall(/srv/www/htdocs/plugins/solr/lib/collectionService.cfc):-1
at railo.runtime.type.UDFImpl.implementation(UDFImpl.java:93):93
at railo.runtime.type.UDFImpl._call(UDFImpl.java:307):307
at railo.runtime.type.UDFImpl.call(UDFImpl.java:208):208
at railo.runtime.ComponentImpl._call(ComponentImpl.java:623):623
at railo.runtime.ComponentImpl._call(ComponentImpl.java:506):506
at railo.runtime.ComponentImpl.call(ComponentImpl.java:1738):1738
at railo.runtime.util.VariableUtilImpl.callFunctionWithoutNamedValues(VariableUtilImpl.java:724):724
at railo.runtime.PageContextImpl.getFunction(PageContextImpl.java:1547):1547
at plugins.solr.index_cfm$cf.call(/srv/www/htdocs/plugins/solr/index.cfm:36):36
at railo.runtime.PageContextImpl.doInclude(PageContextImpl.java:909):909
at railo.runtime.PageContextImpl.doInclude(PageContextImpl.java:861):861
at railo.runtime.listener.ModernAppListener._onRequest(ModernAppListener.java:206):206
at railo.runtime.listener.MixedAppListener.onRequest(MixedAppListener.java:18):18
at railo.runtime.PageContextImpl.execute(PageContextImpl.java:2212):2212
at railo.runtime.PageContextImpl.execute(PageContextImpl.java:2179):2179
at railo.runtime.engine.CFMLEngineImpl.serviceCFML(CFMLEngineImpl.java:331):331
at railo.loader.servlet.CFMLServlet.service(CFMLServlet.java:29):29
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728):728
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305):305
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210):210
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222):222
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123):123
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472):472
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171):171
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99):99
at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:680):680
at mod_cfml.core.invoke(core.java:160):160
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936):936
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118):118
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407):407
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004):1004
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589):589
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310):310
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source):-1
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source):-1
at java.lang.Thread.run(Unknown Source):-1

Column: 0
ID: ??
Line: 173
Raw Trace: solr.lib.collectionservice_cfc$cf.udfCall1(/srv/www/htdocs/plugins/solr/lib/collectionService.cfc:173)
Template: /srv/www/htdocs/plugins/solr/lib/collectionService.cfc
Type: cfml

Column: 0
ID: ??
Line: 220
Raw Trace: solr.lib.collectionservice_cfc$cf.udfCall2(/srv/www/htdocs/plugins/solr/lib/collectionService.cfc:220)
Template: /srv/www/htdocs/plugins/solr/lib/collectionService.cfc
Type: cfml

Column: 0
ID: ??
Line: 36
Raw Trace: plugins.solr.index_cfm$cf.call(/srv/www/htdocs/plugins/solr/index.cfm:36)
Template: /srv/www/htdocs/plugins/solr/index.cfm
Type: cfml