Hi Alan,
you can determine the cause by looking at this part of the stacktrace:
Caused by: org.dspace.app.xmlui.wing.WingInvalidArgument: The
'characters' parameter is required for list items.
at
org.dspace.app.xmlui.wing.element.AbstractWingElement.require(AbstractWingElement.java:117)
at org.dspace.app.xmlui.wing.element.List.addItem(List.java:292)
at
org.dspace.app.xmlui.aspect.administrative.ControlPanel.addDSpaceConfiguration(ControlPanel.java:511)
This tells you that the 'characters' parameter is an empty string and
addItem uses the require() method to check for that. If you go up a call,
addItem() is called from the ControlPanel class, specifically line 511:
https://github.com/DSpace/DSpace/blob/dspace-3_x/dspace-xmlui/src/main/java/org/dspace/app/xmlui/aspect/administrative/ControlPanel.java#L511
The parameter passed to addItem() is db.maxconnections property from
dspace.cfg. So it seems you either didn't define it or left it empty. If
you didn't touch this property in dspace.cfg, the problem is in
build.properties. All properties defined in build.properties are
transferred to dspace.cfg when you execute ant (update or fresh_install).
You have to make sure you do not comment out any line in build.properties.
Read the warning here:
https://wiki.duraspace.org/display/DSDOC3x/Configuration#Configuration-Thebuild.propertiesConfigurationPropertiesFile
Regards,
~~helix84
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