Please refer to the below error and causes for a connection timeout error.
Error:
2020-03-06 11:56:53 pool-1-thread-1 ERROR AEAgentSeqWFHandler:49 - Error fetching sequential workflows
org.apache.http.conn.HttpHostConnectException: Connect to 172.17.137.8:8443 [/172.17.137.8] failed: Connection refused: connect
Causes:
