Rudder

When attempting to create a technique, by adding resources within some folders to it (/resources/testnested/file.txt) before creating the technique by clicking on the Save button, there is an error on creation :

INFO  api-processing.response-error - An error occurred during technique update after files were created for ncf Technique test creating fiber error; cause was: SystemError: An error occurred; cause was: zio.FiberFailure: key not found: /ncf_techniques/test_creating_fiber_error/1.0/resources 
 -> com.normation.cfclerk.services.impl.GitTechniqueReader.recBuildRoot$1(GitTechniqueReader.scala:701)
 -> com.normation.cfclerk.services.impl.GitTechniqueReader.$anonfun$processCategories$30(GitTechniqueReader.scala:753)
 -> com.normation.cfclerk.services.impl.GitTechniqueReader.processCategories(GitTechniqueReader.scala:731)
 -> com.normation.cfclerk.services.impl.GitTechniqueReader.processRevTreeId(GitTechniqueReader.scala:552)
 -> com.normation.cfclerk.services.impl.GitTechniqueReader.getModifiedTechniques(GitTechniqueReader.scala:342)
 -> com.normation.cfclerk.services.impl.GitTechniqueReader.getModifiedTechniques(GitTechniqueReader.scala:339)

It breaks the technique library entirely, and leaves it in an inconsistent state :

• the draft is kept in the technique editor, and it no has no resource
• the technique is created in the configuration repository : /var/rudder/configuration-repository/techniques/ncf_techniques/test_creating_fiber_error/1.0/resources/testnested/
• there is a periodic technique library refresh (rudder.batch.techniqueLibrary.updateInterval=5min by default), which ends up with a similar error as above and huge stack trace, because the internal state of technique is broken
• it is impossible to create another technique in the editor, the same error as above will happen when attempting to create another technique

#26863 can be a symptom, when attempting to create the technique again after the first creation request has failed, since resources will already be moved to the target technique folder