Hi everybody,
I've been getting a persistent problem with our DSpace server that it
produces only error messages for OAI-PMH harvesting. It's probably been
going on since I upgraded to 1.4.1, but I didn't realise at the time and
have only just got round to trying to sort it out. Whenever you access
it (e.g.
https://gate-test.library.lse.ac.uk/dspace-oai/request?verb=ListSets -
I've set this up as a replacement for our advertised location, which is
now behind the institutional firewall until I get it to work), you see a
screen with a NullPointerException error, which appears in the logs as
follows:
02-Nov-2007 15:09:40 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet oai-handler threw exception
java.lang.NullPointerException
at ORG.oclc.oai.server.OAIHandler.doGet(OAIHandler.java:228)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199)
at
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:767)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:697)
at
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:889)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:619)
I've just completed upgrading to 1.4.2 to see if that sorted it, with no
joy. So is there anything else that I could try?
Cheers,
Simon
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