Outbound REST Does not Produce Array as Root Element, Causing Deserialization Error at External System (Doc ID 2877499.1)

Last updated on APRIL 04, 2025

Applies to:

Symptoms

On : 21.8 version, Siebel EAI

When attempting to invoke an outbound REST service that expects an array as the root element, the external system responds with a deserialization error, indicating the generated JSON is not an Array of Integer.

Further analysis of restoutbound.log shows Siebel produced the json message

ERROR
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(external system error while parsing the message Siebel produced in the request)
 
exceptionType=Internal Server Error, callContextUUID=Optional.empty, userMessages=[], extensions={}} xxx.lang.JesTechnicalException: Cannot deserialize value of type `java.util.ArrayList` from Object value (token `JsonToken.START_OBJECT`) at [Source: (BufferedInputStream); line: 1, column: 1]


STEPS
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The issue can be reproduced at will with the following steps:


1. in tools, import 3NEWswagger.json.

2. in the client, simulate the proxy business service siefsconnectorpartnerservice3 , method AdminRestResource_resendPartnerToSiebelFromList_post:post
with appropriate inputs.

3. check restoutbound.log of the internal container and confirm it produced converted JSON :

{"test":[12345679,12345678]}

The expectation was to produce just "[12345679,12345678]" as tested in https://editor.swagger.io/

Changes

Cause

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