Cannot allocate from estimates in IIS - Error [en – Unable to process request – Server or Network error]

Products

• Clarity PPM On Premise
• Clarity PPM SaaS

Issue/Introduction

• User is getting error message [en – Unable to process request – Server or Network error] when using select select all option and then performing an “Allocate from Estimates”.(Home -> Project -> Teams tab) 
• User is not getting error when he selects a few resources
• The issue happens if the page results is set to show 50, but does not happen when set to a lower amount (40, 30, etc)

Error in app-ca.logs:

ERROR 2020-07-04 00:22:35,972 [http-nio-80-exec-11] clarity.ui (clarity:admin:zzzzzzz__zzzzzz-zzzz-zzzz-zzzz-zzzzzzzzzzzz:security.logs) UI_MSG[:Sat Jul 04 2020 10:51:26 GMT 0530 (India Standard Time):OnError called--Client Side Exception

java.lang.Exception: VXMLRequest failed.  HTTP status code was: 404

Environment

Release : All Supported Releases

Component : CA PPM RESOURCE MANAGEMENT

Microsoft Information Internet Services (IIS)

Cause

• This is due to the length of the query limit in the URL being above IIS's default limit of 2048.
• To check the query length count in the URL:

1. Copy and paste the URL throwing the 404 error from developer tools into a word document
2. Highlight the data in the URL after the first '?' and then do a Word count. 

Resolution

• Increase the query limit in IIS to be above the query length in the URL
  • The limit can be increased in web.config of IIS settings.
  • See the following Microsoft link with more details: Request Limits <requestLimits>

Workaround: 

1. Go to Home->Projects-> and click on a project
2. Click on the Team tab
3. Click on the Configure icon on the right hand side
4. From the List Column Section tab drop down, select Options
5. Change Rows per Page from 50 to a lower amount
6. Click Save and Return

Additional Information

• See KB 139285 for the full list of known KBs regarding Error: Unable to process request - Server or network error
• See KB: 141061 for tips on how to optimize use of Self Service for Clarity