I'm going to ask for your support regarding a problem we're having today. We also have HDFS DELEGATION TOKEN problem in RA cluster, if some of our controllers (you can accept it as an application) are not restarted within 7 days, the tasks they run fail. Actually, there is a similar situation here, but it looks a little different than what we experience today. Although the controller restarted yesterday, we observed perpetrators with the same error today. After the controller is restarted, the tasks are completed when they are restarted. I am sending the klist outputs from the .4 server, the first one is between 12:45-01:00pm, the next one is around 01:45pm, why did the situation occur here, can I ask for your support?