DSpace 7.2.1 OAI-PMH Internal Server Error 500 - Log: "OAI 2.0 wasn't correctly initialized"

[Matthias Letsch]

Hello there,

I am setting up DSpace 7.2 as an institutional repository for a University.

The OAI-PMH interface has some internal server Error. I am aware that there are already some threads regarding this topic, but none of them seem to quite fit my problem. I did run the ./dspace oai import -c task before and that task was "successful". However, the OAI page at .../server/oai/request?verb=Identify tells me:

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Thu Jun 15 11:38:39 CEST 2023

There was an unexpected error (type=Internal Server Error, status=500).

An exception has occurred

The logs report the errors stated below.

Among those is for example "OAI 2.0 wasn't correctly initialized, please check the log for previous errors" --> I honestly don't know how to "correctly initialize" OAI 2.0 and I didn't find any previous errors regarding OAI. The configuration in /config/modules/oai.cfg seems to be okay, also the /config/crosswalks/oai/xoai.xml, but I didn't find a xsl stylesheet anywhere (xoai.xml refers to static/style.xsl)

Can anyone do anything with the info here or maybe knows the problem and can help me? Thanks a lot!

Kind regards,
Matthias

The logs entries:

2023-06-14

2023-06-14 10:09:04,418 ERROR unknown 84b90674-ce4a-4030-b1a9-58fde903f366 org.dspace.app.rest.exception.DSpaceApiExceptionControllerAdvice @ An exception has occurred (status:500)
javax.servlet.ServletException: OAI 2.0 wasn't correctly initialized, please check the log for previous errors
    at (...)

Caused by: org.dspace.xoai.services.api.config.XOAIManagerResolverException: com.lyncode.xoai.dataprovider.exceptions.ConfigurationException: net.sf.saxon.s9api.SaxonApiException: Errors were reported during stylesheet compilation
        at (...)
Caused by: com.lyncode.xoai.dataprovider.exceptions.ConfigurationException: net.sf.saxon.s9api.SaxonApiException: Errors were reported during stylesheet compilation

     at (...)
Caused by: javax.xml.transform.TransformerConfigurationException: net.sf.saxon.s9api.SaxonApiException: Errors were reported during stylesheet compilation

   at (...)

Caused by: net.sf.saxon.s9api.SaxonApiException: Errors were reported during stylesheet compilation

   at (...)

Caused by: net.sf.saxon.trans.XPathException: Errors were reported during stylesheet compilation

   at (...)

2023-06-14 10:51:25,071 ERROR unknown unknown org.dspace.xoai.app.BasicConfiguration @ Not able to start XOAI normal cache service.
org.dspace.xoai.services.api.config.XOAIManagerResolverException: com.lyncode.xoai.dataprovider.exceptions.ConfigurationException: net.sf.saxon.s9api.SaxonApiException: Errors were reported during stylesheet compilation
        at (...)

2023-06-12

2023-06-12 14:11:52,342 ERROR unknown f46fee61-e391-4da0-b9ea-0b032209a0ac org.dspace.app.rest.exception.DSpaceApiExceptionControllerAdvice @ An exception has occurred (status:500)
javax.servlet.ServletException: Unable to load XOAI manager, please, try again.

[Mohammad S. AlMutairi]

Hello Matthias,

It's very likely the culprit is the DSpace version 7.2 you have installed and you work on. I think most of the issues including this one you reported will go away if you install the latest DSpace version available which is 7.5. Check Eike Martin Löhden thread https://groups.google.com/g/dspace-tech/c/MuACOZ1MpbU/m/jsODicr2BQAJ

Hope it helps

Mo.