[KNOX-3030] SAXException occurs while parsing old topology on the descriptor handle path

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.1.0
• Component/s: Server
• Assignee: Sandor Molnar
• Reporter: Sandor Molnar
• Created: 19/Apr/24 07:04
• Updated: 22/Apr/24 18:11
• Resolved: 22/Apr/24 18:11

Description

In highly concurrent environments  Knox may fail to parse the generated topology from descriptors/shared providers thus topology deployment fails with the following error:

2024-01-26 10:35:25,173 ERROR topology.simple (SimpleDescriptorHandler.java:shouldPersistGeneratedTopology(682)) - Error comparing the generated cdp-proxy topology with the existing version: org.xml.sax.SAXParseException; lineNumber: 35; columnNumber: 20; Error at line 35 char 20: class org.apache.knox.gateway.topology.Provider cannot be cast to class org.apache.knox.gateway.topology.Param (org.apache.knox.gateway.topology.Provider and org.apache.knox.gateway.topology.Param are in unnamed module of loader java.net.URLClassLoader @668bc3d5)
2024-01-26 10:35:25,173 INFO  topology.simple (SimpleDescriptorHandler.java:generateTopology(622)) - Skipping redeployment of the cdp-proxy topology because it already exists and has not changed. 

 This will lead to unreachable end-user endpoints.

Issue Links

• links to: GitHub Pull Request #901