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https://jira.duraspace.org/browse/DS-1157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=27272#comment-27272
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Andrea Schweer commented on DS-1157:
------------------------------------
I haven't run into this again and haven't heard from anyone else with this
problem, so I'm going to close this issue.
> SFX File Reader causes NPE in XMLUI
> -----------------------------------
>
> Key: DS-1157
> URL: https://jira.duraspace.org/browse/DS-1157
> Project: DSpace
> Issue Type: Bug
> Components: XMLUI
> Affects Versions: 1.7.2
> Reporter: Andrea Schweer
> Assignee: Andrea Schweer
> Priority: Major
>
> We've had a few cases recently where item pages (XMLUI, DSpace 1.7.2) would
> throw an error ("Failed to process pipeline"); a DSpace restart usually fixed
> the problem. In digging around in the logs, I found that at least in one
> case, the underlying exception was:
> Caused by: java.lang.NullPointerException
> at
> org.dspace.app.sfx.SFXFileReader.processFields(SFXFileReader.java:159)
> at org.dspace.app.sfx.SFXFileReader.doNodes(SFXFileReader.java:128)
> at org.dspace.app.sfx.SFXFileReader.loadSFXFile(SFXFileReader.java:60)
> at
> org.dspace.app.xmlui.aspect.artifactbrowser.ItemViewer.addPageMeta(ItemViewer.java:182)
> at
> org.dspace.app.xmlui.wing.AbstractWingTransformer.startElement(AbstractWingTransformer.java:218)
> ... 286 more
> At this particular point, the site was being crawled by a Google Mini
> instance, which requests around 10 item pages at a time (within milliseconds
> of each other) -- not sure if this was related or not.
> Since JSPUI uses the SFXFileReader as well, JSPUI may well be affected by
> this problem too. I noticed this on 1.7.2, but it doesn't look like the
> SFXReader code has changed substantially since then, so it probably affects
> 1.8.x and the 3.x versions as well.
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