Support Article

Concurrent Exception coming



In a report , there is one Preview button to have the options of Export to pdf, Export to excel etc. Multiple users can see the report at a time, but when multiple users are trying to Preview, exception is faced.

Error Messages

caught exception java.util.ConcurrentModificationException

Steps to Reproduce

  1. Click on Add report button
  2. Submit the report
  3. Report prepared and then click on the Preview button.

Root Cause

A defect in Pegasystems’ code or rules : Not applicable


Perform the following local-change:
To avoid the issue , you can configure a check out option for the user operator ID in Security Tab.

Published April 24, 2017 - Updated April 25, 2017

Have a question? Get answers now.

Visit the Collaboration Center to ask questions, engage in discussions, share ideas, and help others.