[OLINGO-1578] The error messages from Olingo V2 expose implementation details

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: V2 2.0.12
• Component/s: odata2-core
• Assignee: mibo
• Reporter: Vladimir Mikhaylenko
• Created: 25/Jul/22 15:10
• Updated: 30/Aug/22 20:50

Description

Our customers discovered that malformed JSON payload causes CAP to expose the details of the implementation to end users. 

The offending message is here https://github.com/google/gson/blob/503c20bb392e10fd6ffa9a12afdc33d2ba2d2c38/gson/src/main/java/com/google/gson/stream/JsonReader.java#L1412

Olingo wraps all the exceptions under EntityProviderException with message reference EXCEPTION_OCCURED. To filter that on CAP side, we need more specific message reference. 

I have attached suggested changes as a patch.