Current 3.10.1 RC is plagued with a deadlock that happens when a client logs out or some other action that may be triggering this. Below is a snippet of a thread dump
While googling around, I found this: https://issues.apache.org/jira/browse/DIRMINA-1012
Which has an interesting comment that the sslFilter needs to come before the threaded Executor. dwd made a patch and testing looks good so far!
we are hopeful that this is fixed in 3.10.1