I think I've found the reason for the problem. It's not related to the Spark version. I used the Java process analysis tool Arthas to investigate and found that the AM startup process was blocked at the creation of the Timeline client. And this problem might be due to our TimeLine service using an embedded HBase service. When we configured the HBase used by the TimeLine service to our production environment's HBase, the problem disappeared.     ... View more

Hi @Meepoljd It seems like the issue is with the certificate. Make sure the certificate is created with fqdn. The curl command is working because, as you passing --insecure, it ignores invalid and self-signed certificate errors. ... View more