I have an Informatica integration workflow processing around 200 or 100 records each session for 10 sessions concurrently to REST API (Salesforce). It first authorizes using connected app details (client_id), client and gets token and use this token to post the data to the REST API. However, I get 400 bad request, authentication failure (means it may face error at authorization itself) when I run 10 sessions at a time. With single session it runs fine, so the issue is not with the code and 5 sessions run good but sometimes we receive timeout based commit point.
Is there any concurrent api requests limit that is causing this issue?