Keeping an eye on it now to see what is happening. The total number of sessions (bearing in mind it is 20:11 on a Sunday) keeps switching between 11 and 12 - so pretty trivial. The number of concurrent connections is floating between 1800 and 2000+ (maximum 3892) so that is not going up at an alarming rate at the moment. I was wondering if this number of connections is normal for so few sessions though? Why is the number of connections so much higher than the number of sessions? I obviously don't know the difference.

There are a lot of warnings
21:06:03 Current delay for tasks scheduled on thread pool TLS/SSL HANDSHAKE is 18 seconds. Timer​-1
21:06:03 If the delay issue persists, taking a JVM full thread dump may be the best way to investigate the issue. Timer​-1
21:06:05 Current delay for tasks scheduled on thread pool TLS/SSL HANDSHAKE is 19 seconds. Timer​-1
21:06:05 If the delay issue persists, taking a JVM full thread dump may be the best way to investigate the issue. Timer​-1
21:06:07 Current delay for tasks scheduled on thread pool TLS/SSL HANDSHAKE is 19 seconds. Timer​-1
21:06:07 If the delay issue persists, taking a JVM full thread dump may be the best way to investigate the issue. Timer​-1
21:06:09 Current delay for tasks scheduled on thread pool TLS/SSL HANDSHAKE is 19 seconds. Timer​-1