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2019

Quite the problem is  mis-matched time on the Learn server and the tool provider. So first, make certain both servers are running some means of syncing to a time server, ex: ntpd. Second, from a case that I needed help from our OAuth expert with, make certain that the code that calculates the OAuth signature includes everything, including the port. Example: If the Learn server is available on https://mybig.co.com:8443 then the OAuth signature calculation for the LTI launch must include the 8443 portion of the URL. 

 

May all your LTI launches be successful!

Recently we had a report that an application running on a partner's server was no longer able to send requests to Blackboard's Learn servers. They were SOAP requests - which is being deprecated - but that wasn't the issue. 

 

We've moved our servers to TLSv1.1/1.2. We're also using a modern set of ciphers. Make certain you're using both and you'll be able to connect!

 

Here's one article that describes a symptom and solution for those using Microsoft .Net libraries.

https://stackoverflow.com/questions/35621686/authentication-failed-because-the-remote-party-has-closed-the-transport-stream-e

 

Happy Coding!

I've been getting multiple inquires about finding log files in SaaS. As of 3600.0.0, Kibana is no longer available in SaaS. READ: https://blackboard.secure.force.com/btbb_articleview?id=kA41O000000Cgaa 

 

To stay up to date on changes like this to Learn - keep abreast of announcements on Behind the Blackboard. This video shows you how you can subscribe to receive an email  when a new release comes out with changes like this.

 

Here is our latest help documentation about getting the log files from SaaS:  https://help.blackboard.com/Learn/Administrator/SaaS/System_Management/Logs