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1. marmoure

   changed the title [-][BUG] Unable to connect to OxygenXML `java.lang.NoClassDefFoundError: xyz/elemental/mediatype/MediaType`[/-] [+][BUG] Unable to connect to OxygenXML[/+] on May 19, 2026
2. adamretter commented on Jun 2, 2026

   

   adamretter

   on Jun 2, 2026

   Last edited by adamretter

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   After #215 there is still an issue whereby oXygen is trying to use the XML:DB API v1 which is also the version used in Elemental 6.x.x, but with Elemental 7.x.x we require the XML:DB API v2.

   The XML:DB jar is deployed to oXygen by Elemental when the database connection is first established, but it looks like oXygen was coded against the XML:DB v1 API, which is why we now get this stacktrace in oXygen when connecting to Elemental 7.x.x:

   java.lang.NoSuchMethodError: 'org.xmldb.api.base.Service org.xmldb.api.base.Collection.getService(java.lang.String, java.lang.String)'
   java.lang.NoSuchMethodError: 'org.xmldb.api.base.Service org.xmldb.api.base.Collection.getService(java.lang.String, java.lang.String)'
   	at ro.sync.db.nxd.exist.k.yi(Unknown Source)
   	at ro.sync.exml.editor.x.db$36.b(Unknown Source)
   	at ro.sync.db.nxd.b.zj(Unknown Source)
   

   CC @raducoravu

   👍React with 👍1Reacted by Radu Coravu
3. raducoravu commented on Jun 19, 2026

   

   raducoravu

   on Jun 19, 2026

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   FYI I made changes in the Oxygen Exist connector for the upcoming (Autumn) 29 version to take into account the Collection.getService API change (and also be backwards compatible).
   I also made changes to support the fact that mimeType.getXMLDBType now returns Object instead of String
   And existResource.getLastModificationTime now seems to return Instance instead of Date.

   I also had to manually add the libraries fastutil-8.5.18.jar and jline-3.30.6.jar to the set of libraries downloaded automatically by Oxygen's Exist connector by looking in the eXist.jnlp.

   I did not find any other problems testing various Oxygen Exist actions (open, copy, rename, move) but there may be.

   In Oxygen 29 we plan to mark the eXist connector in Oxygen as deprecated, not signaling that we plan to remove it but that we do not actively work on it and that third parties can also come up with a plugin for Oxygen to Exist connection.
4. adamretter

   self-assigned this

   on Jul 17, 2026
5. adamretter

   added

   bugSomething isn't workingSomething isn't working

   on Jul 17, 2026
6. adamretter

   added this to the elemental-7.7.1 milestone on Jul 17, 2026