Broken custom variables

Ben Wagner

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Oct 16, 2025, 9:26:57 AMOct 16

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Hi XNAT team,

I've been getting some wackiness with custom variables lately, but have hit a real stumbling block today. I'm trying to add new custom variable and I'm getting the following in the restlet.log:

2025-10-16 08:21:32,067 [ajp-nio-127.0.0.1-8008-exec-8] ERROR org.nrg.xnat.restlet.resources.ProtocolResource - An unknown error occurred trying to store the protocol
java.lang.NullPointerException: null
at org.nrg.xdat.om.base.BaseXnatDatatypeprotocol.isProjectSpecific(BaseXnatDatatypeprotocol.java:162)
at org.nrg.xnat.restlet.resources.ProtocolResource.hasChanged(ProtocolResource.java:249)
at org.nrg.xnat.restlet.resources.ProtocolResource.handlePut(ProtocolResource.java:141)
at org.restlet.Finder.handle(Finder.java:359)
at org.restlet.Filter.doHandle(Filter.java:150)
at org.restlet.Filter.handle(Filter.java:195)
at org.restlet.Router.handle(Router.java:504)
at org.restlet.Filter.doHandle(Filter.java:150)
at org.restlet.Filter.handle(Filter.java:195)
at org.restlet.Filter.doHandle(Filter.java:150)
at org.restlet.Filter.handle(Filter.java:195)
at org.restlet.Router.handle(Router.java:504)
at org.restlet.Filter.doHandle(Filter.java:150)
at org.restlet.Filter.handle(Filter.java:195)
at org.restlet.Filter.doHandle(Filter.java:150)
at org.restlet.Filter.handle(Filter.java:195)
at org.restlet.Filter.doHandle(Filter.java:150)
at com.noelios.restlet.StatusFilter.doHandle(StatusFilter.java:130)
at org.restlet.Filter.handle(Filter.java:195)
at org.restlet.Filter.doHandle(Filter.java:150)
at org.restlet.Filter.handle(Filter.java:195)
at com.noelios.restlet.ChainHelper.handle(ChainHelper.java:124)
at com.noelios.restlet.application.ApplicationHelper.handle(ApplicationHelper.java:112)

<SNIP>

Any suggestions? Running 1.9.2.3.

Thanks,

Ben

Ben Wagner

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Oct 17, 2025, 12:11:19 PMOct 17

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Follow up with more wonkiness. The custom variable finally showed up, but now none of the other custom vars on showing up in the session, but are in the XML. See attached images. Any suggestions?

manage_vars.png

session.png

xml.png

Ben Wagner

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Oct 22, 2025, 9:53:02 AMOct 22

to xnat_discussion

Hmm..

So, it looks like the definition for this specific group of custom variables was lost/overwritten. I added them back AND then RESTARTED and they reappeared. It seems like with each edit lately I'm having to manually restart for them to show. That's now how it's supposed to work.