Thank you for your response, the error that a user would see is CAS Unavailable, and when we checked our CAS logs it was because the user could not get a connection from the Oracle Database that CAS is using for tickets.
So we have increased our c3p0 connections to avoid this problem but on certain occasions we would see this happen again even though prior days there were heavier loads and no issue. Its as if the connections are not released quick enough for the next user. Thanks! ___________________ Juan Quintanilla UTS - Enterprise Group 305-348-6573 [email protected]<mailto:[email protected]> ________________________________ From: Biondi, Dan <[email protected]> Sent: Wednesday, November 27, 2013 11:50 AM To: [email protected] Cc: Liu, Yuan Subject: [cas-user] FW: CAS with Blackboard Hi Juan, I asked our LMS lead if he was aware of this issue. See his response below. Dan Biondi Portal / LMS / CAS Coordinator Information Resources and Technology Sacramento State o: 916.278.7616 From: Liu, Yuan Sent: Wednesday, November 27, 2013 8:43 AM To: Biondi, Dan Cc: Osburn, Andy G Subject: RE: CAS with Blackboard Hi Dan, There's a known issue with current Blackboard Learn CAS authentication building block - CAS authentication causes "Unable to create new native thread" error after login. This due to a bug where java threads are not being cleared after users have successfully authenticated, so the CAS B2 needs to be updated to latest version. If the system using a self-developed or open source CAS authentication module (e.g., CAS Fallback), they might need to open a ticket to Bb Support. More detailed information would be helpful to troubleshoot this issue: 1. Version of Blackboard Learn system 2. Application server and database server OS 3. Jdk version in application server 4. Memory size 5. Load-balanced environment or not Also they can generate an Oracle AWR report to find out something from database side. -Yuan From: Biondi, Dan Sent: Wednesday, November 27, 2013 8:13 AM To: Liu, Yuan Cc: Osburn, Andy G Subject: FW: CAS with Blackboard Yuan: Are you aware of anything helpful that I could pass on? -db From: Juan Quintanilla [mailto:[email protected]] Sent: Monday, November 25, 2013 8:35 AM To: [email protected]<mailto:[email protected]> Subject: [cas-user] CAS with Blackboard Hi, Wondering if anyone has seen or currently has CAS configured with Blackboard? We encountered some instances were all of a sudden the number of Busy DB Connections in our C3P0 pool jump up 300 and continue to rise until we get the db connection checkout timeout error in our CAS log. We are thinking that its because the connection with Blackboard during Ticket interaction under heavy traffic is not finishing quick enough and closing the DB connection for the next user. Has anyone had any experience with CAS and C3P0 pooling using oracle? In our situation we are having to increase our DB connections to avoid these spikes? Thanks! ___________________ Juan Quintanilla [email protected]<mailto:[email protected]> -- You are currently subscribed to [email protected]<mailto:[email protected]> as: [email protected]<mailto:[email protected]> To unsubscribe, change settings or access archives, see http://www.ja-sig.org/wiki/display/JSG/cas-user -- You are currently subscribed to [email protected] as: [email protected] To unsubscribe, change settings or access archives, see http://www.ja-sig.org/wiki/display/JSG/cas-user -- You are currently subscribed to [email protected] as: [email protected] To unsubscribe, change settings or access archives, see http://www.ja-sig.org/wiki/display/JSG/cas-user
