Per Period Metrics entering data cell gets locked and unable to edit

Products

• Clarity PPM On Premise
• Clarity PPM SaaS

Issue/Introduction

When entering per period metrics (Time Scale Value - TSV) in the assignment grid, sometimes the cell you are in gets locked, and you are unable to edit the value without clicking out and going back in or waiting a certain amount of time (10 seconds or more) for the cells to unlock

This is noticed after running into defect DE60806 where tabbing can jump you down a row. When you use your mouse to click back into the correct cell and row that cell is not able to be edited (Typing in the cell doesn't change the value). Sometimes the entire row gets locked. So, if you tab to another cell in the same row, you can't enter data in that cell as well. 

Error you may see in the app-ca.logs:

ERROR 2021-05-24 16:44:07,834 [http-nio-1577-exec-551] niku.xql2 (clarity:admin:....:PPM_REST_API) SetAssignmentEstCurve.eval() exception

org.json.JSONException: JSONObject["value"] not found.

From Developer tools, the below URL shows up as pending for a longer period of time then expected. Once this URL processes, you are able to edit the cell again. 
http://<Clarity url>/ppm/rest/v1/projects/7055356/tasks/21689248/assignments/11285269?objectFilter=(projectFilter(projects%3D(7055356)))&tsvParams=(periods%3D(estimateCurve,months,12,2021-01-01T00:00:00,fiscal),(actualCurve,months,12,2021-01-01T00:00:00,fiscal)),(isGrandTotal%3Dtrue),(workEffortUnit%3Dhours)

Environment

Release : 15.9.1, 15.9.2

Component : CLARITY PROJECT MANAGEMENT

Cause

This issue is due to DE60806.

Resolution

Since this issue happens after reproducing DE60806, once you upgrade to a release where that defect is fixed, this issue will no longer occur.

DE60806 is fixed in 15.9.2 patch 1 and 15.9.3

See Per Period Metrics jumps to next row instead of column if you tab quickly for more details on DE60806.

Workaround: Wait until the cells unlock (Other rows will typically be editable)

Additional Information

See also Per Period Metrics known issues