Hi,

We are facing weird issue on hanging job which never finishes. can not open job page by clicking on job name which later results into ERR_CONNECTION_CLOSED.

This problem happening after upgrading jenkins 2.176 to 2.235.2 (Even we didn't update plugins). Later thought plugins update is necessary so updated all plugins but problem is still there. 

The issue is happening once in while and only some of jobs are affected which we can not open. Restarting jenkins server helps.

The plugins Version.

Pipeline Groovy : 2.90

Pipeline Job: 2.40

what could be the reason??