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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