Reference for Understanding the thread dump : https://docs.oracle.com/cd/E13150_01/jrockit_jvm/jrockit/geninfo/diagnos/using_threaddumps.html

This thread is one of many worker threads in Java's common thread pool. Right now, it's paused, waiting for something from the pool while trying to establish a secure connection. It's been waiting for over 4 hours, which suggests it might be stuck or delayed due to network problems or issues with the thread pool itself.

Please refer your implementation for the configuration changes like network timeouts and check if the remote server is currently up and running healthy.