There seems to be numerous instances of this error in one form or another <https://groups.google.com/forum/#!searchin/dspace-tech/failed$20to$20process$20pipeline> .
Most if not all of those inquiries deal with a problem being experienced in the interface around a problem with their SOLR index but I am not experiencing any known issues - SOLR or otherwise! This error is not appearing in the interface to me but it is all over my error log and I'd like to fix it or at least know why it is happening. It seems to clearly be an issue with the sitemap and what it is expecting to build, but I haven't been able to decipher/interpret it. >From cocoon.log for today: (line prior) 2016-02-12 10:47:38,075 INFO org.apache.cocoon.caching.impl.CacheImpl - Cache MISS for PK_G-file-cocoon://DRI/favicon.ico?pipelinehash=-2267529246176899734_T-IncludePageMeta--5280603869656992694_T-IncludePageMeta-7145676799531262490_T-IncludePageMeta-1889180249406810576_T-xslt-file:///E:/dspace/webapps/xmlui/themes/BSU/BSU.xsl_T-i18n-context://i18n/?en_US__S-xhtml-;doctype-public=-//W3C//DTD XHTML 1.0 Strict//EN;doctype-system=http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd;encoding=UTF-8;indent=yes 2016-02-12 10:47:38,090 ERROR cocoon.handled - Failed to process pipeline at <map:serialize type="xml"> - file:///E:/dspace/webapps/xmlui/aspects/aspects.xmap:96:31 at <map:generate type="file"> - file:///E:/dspace/webapps/xmlui/aspects/aspects.xmap:95:55 at <map:serialize type="xml"> - resource://aspects/ViewArtifacts/sitemap.xmap:359:32 at <map:transform type="Navigation"> - resource://aspects/ViewArtifacts/sitemap.xmap:91:59 at <map:generate> - resource://aspects/ViewArtifacts/sitemap.xmap:79:40 at <map:serialize type="xml"> - resource://aspects/BrowseArtifacts/sitemap.xmap:108:40 at <map:transform type="Navigation"> - resource://aspects/BrowseArtifacts/sitemap.xmap:47:47 at <map:generate> - resource://aspects/BrowseArtifacts/sitemap.xmap:41:28 at <map:serialize type="xml"> - resource://aspects/Discovery/sitemap.xmap:214:40 at <map:transform type="Navigation"> - resource://aspects/Discovery/sitemap.xmap:78:47 at <map:generate> - resource://aspects/Discovery/sitemap.xmap:66:28 at <map:serialize type="xml"> - resource://aspects/Administrative/sitemap.xmap:1074:31 at <map:transform type="Navigation"> - resource://aspects/Administrative/sitemap.xmap:299:38 at <map:transform type="SystemwideAlerts"> - resource://aspects/Administrative/sitemap.xmap:298:44 at <map:generate> - resource://aspects/Administrative/sitemap.xmap:296:19 at <map:serialize type="xml"> - resource://aspects/EPerson/sitemap.xmap:302:31 at <map:transform type="Navigation"> - resource://aspects/EPerson/sitemap.xmap:107:38 at <map:generate> - resource://aspects/EPerson/sitemap.xmap:96:19 at <map:serialize> - resource://aspects/Submission/sitemap.xmap:277:27 at <map:generate> - resource://aspects/Submission/sitemap.xmap:257:26 at <map:serialize type="xml"> - resource://aspects/Statistics/sitemap.xmap:292:36 at <map:generate> - resource://aspects/Statistics/sitemap.xmap:37:19 at <map:serialize> - resource://aspects/Workflow/sitemap.xmap:161:27 at <map:generate> - resource://aspects/Workflow/sitemap.xmap:145:26 at <map:serialize type="xml"> - file:///E:/dspace/webapps/xmlui/aspects/aspects.xmap:85:34 at <map:transform type="PageNotFound"> - file:///E:/dspace/webapps/xmlui/aspects/aspects.xmap:84:43 at <map:generate> - file:///E:/dspace/webapps/xmlui/aspects/aspects.xmap:83:22 at <map:serialize type="xhtml"> - file:///E:/dspace/webapps/xmlui/themes/BSU/sitemap.xmap:182:46 at <map:transform type="i18n"> - file:///E:/dspace/webapps/xmlui/themes/BSU/sitemap.xmap:104:44 at <map:transform> - file:///E:/dspace/webapps/xmlui/themes/BSU/sitemap.xmap:100:59 at <map:transform type="IncludePageMeta"> - file:///E:/dspace/webapps/xmlui/themes/BSU/sitemap.xmap:84:51 at <map:transform type="IncludePageMeta"> - file:///E:/dspace/webapps/xmlui/themes/BSU/sitemap.xmap:80:51 at <map:transform type="IncludePageMeta"> - file:///E:/dspace/webapps/xmlui/themes/BSU/sitemap.xmap:70:51 at <map:generate type="file"> - file:///E:/dspace/webapps/xmlui/themes/BSU/sitemap.xmap:174:67 at <map:match> - file:///E:/dspace/webapps/xmlui/themes/BSU/sitemap.xmap:170:37 Here is the content via E:/dspace/webapps/xmlui/aspects/aspects.xmap:96:31 <map:pipeline internal-only="yes"> <map:match type="AspectMatcher"> <map:select type="parameter"> <map:parameter name="parameter-selector-test" value="{aspectID}"/> <map:when test="0"> <map:generate/> <map:transform type="PageNotFound"/> <map:serialize type="xml"/> </map:when> <map:otherwise> <map:mount uri-prefix="{prefix}" check-reload="" src="{aspect}"/> </map:otherwise> </map:select> </map:match> <map:generate type="file" src="protodocument.xml"/> *(line 95)* <map:serialize type="xml"/> *(line 96)* </map:pipeline> What else is necessary to debug a "Failed to process pipeline" error when you don't even notice a problem when navigating the UI? 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