tSalesforceConnection_1 ComponentException: UNEXPECTED_EXCEPTION

[edane]

hey,

For several days now I have been receiving an error in TALEND STUDIO
When I try to perform a connection test between SALESFORCE and TALEND:
"tSalesforceConnection_1 ComponentException: UNEXPECTED_EXCEPTION"

From the SALESFORCE side I receive that the connection is successful but in TALEND I receive the error I listed above.

im tring to test connection at TEST - sandbox with custom domain not with https://test.salesforce.com

im using TALEND 8 patch - R2026-04

the salesforce upgraded to spring 2026.

thanks

[Rahul_Kale]

Hello edane,

Thank you for reaching out to the Qlik community.
 

The Talend job log clearly shows:-
 

tSalesforceConnection_1 ComponentException: UNEXPECTED_EXCEPTION java.lang.RuntimeException: UNEXPECTED_EXCEPTION

• It fails inside the Salesforce connection component.
• Salesforce side logs success, so authentication is likely OK.
• Error occurs during API/session initialization, not login.
  
  Also, you mentioned:
• Talend 8 (R2026-04).
• Salesforce Spring 2026.
• Using the custom domain (My Domain) sandbox, not https://test.salesforce.com.

This combination is known to cause issues due to API endpoint handling changes + My Domain enforcement.

To deal with this issue, you can use:-
 

Login: test.salesforce.com ✔ Check "Use Sandbox"

Set: API version ≥ 60.0  and install a newer patch (R2026-05+).

Below are the documents that can help you:-
 

Talend Salesforce connection:-
https://help.talend.com/r/en-US/8.0/components/salesforce/tsalesforceconnection

Salesforce login endpoints:-
https://developer.salesforce.com/docs/atlas.en-us.api.meta/api/sforce_api_calls_login.htm

[Denis_Segard]

Hello,
you may too use the method below to generate some more lines when executing the job with log4jLevel=TRACE : 

Add a tJava component with the following "code" :

In Basic Settings :

Logger log = Logger.getLogger("");
ConsoleHandler handler = new ConsoleHandler();
handler.setLevel(Level.ALL);
log.addHandler(handler);
log.setLevel(Level.ALL);

In Advanced Settings :

import java.util.logging.Handler;
import java.util.logging.Logger;
import java.util.logging.Level;
import java.util.logging.ConsoleHandler;

[william12342344]

Likely a Salesforce Spring ’26 compatibility issue with the Talend connector. Update Talend/Salesforce components, verify the API version and custom domain URL, then re-authenticate. The real cause should be in the Talend Studio log behind the generic UNEXPECTED_EXCEPTION.