This line in your bootstrap.conf appears to be the problem:
java.arg.16=-Djavax.security.auth.useSubjectCredsOnly=false
This needs to be changed to true:
java.arg.16=-Djavax.security.auth.useSubjectCredsOnly=true
My understanding is that with that set to false, you have a situation where
There were two exception stack traces that occurred once we tried to have the
processors do something after the ticket had expired:
2020-10-20 22:46:25,406 WARN [NiFi Web Server-30101]
o.a.n.c.r.StandardProcessSession StandardProcessSession[id=5424590257] closing
