I am seeing this error in ION Service, service node in Grid Application. I restarted the ion service but this error occurs again.
I am not able to send out the email with the notification in workflow. I am triggering the workflow in activation policy. I get the notification in the mingle task but I do not receive the actual email.
2018-06-07 20:31:47,123 +0000Z {} ERROR QueueModule org.apache.activemq.broker.TransportConnector: Could not accept connection from tcp://10.2.13.196:58392: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown

Anyone knows what is this error is about?
Thanks,
Jyoti