Hello,
We have just deployed a new DMS with four Linux Cassandra servers in a cluster and four Linux Elastricsearch servers in a cluster. They are connected to the DMS via HTTPS using unsigned SSL certifications.
For the Cassandra cluster, I am using the Apache Cassandra Cluster Monitor 1.0.1.5 and am getting an error in the logs complaining about the unsigned certification as you can see in the attached screenshot. Is it possible to monitor the servers with unsigned certs or can a change be made to the driver to allow it? 
For the Elastic cluster, I am using the Elastic ElasticSearch Cluster Monitor 1.0.1.2 and I am getting an error in the streamviewer complaining about an invalid server response. I am unsure what I am missing or if the certifications are causing issues as well for this one.
Hi David,
For the Cassandra certificate issues:
You can play around with the encryption settings on the 'General' page of the connector. You can disable the TLS validation altogether or you can also disable the revocation check on the certificate (see screenshot) to validate if you can get things working then. If you want to keep the security checks, then you will need to add the certificate(s) to the trusted certificates of the server on which DataMiner is hosted that runs that validation element.
Most likely you will need to do something similar for Elastic.
I figured that out after I posted this, it was right in my face the whole time. Thank you!
It is odd that DataMiner will connect to Cassandra over TLS but the Cluster Monitor won't. There might be an issue with the connection configuration in the element. I would try disabling TLS Validation in the encryption options of the element to see if that helps.
Hi, I assume that in this case an unsigned cert is the same thing as a self-signed cert? I don’t know the specifics of the monitoring drivers, but I would think that if DataMiner is able to connect to the cassandra/elastic cluster, the driver should be as well. Is it possible to verify your DMA is able to connect to both clusters?