Hi Abhijit, Nilesh, Thanks for your reply. Keith from Fusion sent me this KB that resolved my issue. I am reposting here just in case it helps someone else. In our case, the second solution worked for us. We had turned off the load balancing functionality but were still seeing the error. Our server.xml file had the parameter maxHttpHeaderSize instead of Maxheadersize so make sure to look out for that if the first solution applies you.
Problem Users are encountering the following error msg: Unable to setup data connection, which is preventing the application from working correctly (ARERR 9351) Solution 1 Problem due to Maxheadersize limits. The Server.xml file is set at 8k and the Load Balancers are set to 4K. Changing the Load Balancers to 8K resolves the issue Problem In this scenario a security component blocks the GET Requests from Midtier. For POST Requests there are no problems. It seems that Midtier decides, depending of the length (2047), whether a GET or POST will be used. Why are not all requests be sent via POST? Is there a way with which we could change GET request to POST? Solution 2 Kindly note that we do not recommend changing GET requests to POST as wherever GET request is necessary, it will be used which POST might not be able to substitute. If you still wish to use the POST requests instead of GET then you may alter Midtier's config.properties file. Below, is the parameter which you will need to modify in your Midtier's config.properties file: ----------------------------- Change, arsystem.xmlhttp.get=true to, arsystem.xmlhttp.get=false => This will require Restart of your Midtier server. ----------------------------- Note: This modification will be applicable for only Backchannel requests of Midtier. Regards, Chike Agu From: Action Request System discussion list(ARSList) [mailto:[email protected]] On Behalf Of Abhijit Hendre Sent: Friday, June 19, 2015 2:34 AM To: [email protected] Subject: Re: Unable to setup data connection, which is preventing the application from working correctly. HTTP Communication Error : 403 (ARERR 9351) ** Kindly refer below article written by mid-tier SME to understand probable causes behind this issue and solutions. https://communities.bmc.com/mobile/mobile-access.jspa#jive-content?content=%2Fapi%2Fcore%2Fv3%2Fcontents%2F195880 On 18-Jun-2015 11:39 pm, "Agu, Chike U" <[email protected]<mailto:[email protected]>> wrote: ** Hi listers, I started getting this error yesterday after logging into our midtier server. Our home page loads some data after logging in through the midtier without any issues. But when I try to open other forms that loads data I start getting this error: Unable to setup data connection, which is preventing the application from working correctly. HTTP Communication Error : 403 (ARERR 9351) I have scoured the internet for answers but no cigar. Please let me know if you resolved this issue before. Regards, Chike This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email _ARSlist: "Where the Answers Are" and have been for 20 years_ _ARSlist: "Where the Answers Are" and have been for 20 years_ This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email _______________________________________________________________________________ UNSUBSCRIBE or access ARSlist Archives at www.arslist.org "Where the Answers Are, and have been for 20 years"

