Hi,
I see this issue/symptom documented in KB:1103592
Symptoms: 'netstat -an |grep 8145' shows no process listening on port 8145
Java version 1.8.0_242 is not compatible yet for SC 4.x, downgrade to a previous version of Java. Both 1.8.0_232 and 1.8.0_222 are known to work.
SnapCenter for Oracle stops working after upgrading Java to 1.8.0_242:
https://kb.netapp.com/app/answers/answer_view/a_id/1103592
Thanks!