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Support Article

Unable to establish SSL connection for Pega IAC



A PRPC node is being configured in the prgateway servlet.  User provides a secured connection (SSL) to load balancer which redirect to the PRPC server.
An error is thrown "invalid certificate error".
When the URL of the PRPC server is used instead of the load balancer, no error is thrown.


Error Messages

No error message but Invalid certificate error is thrown.

Steps to Reproduce

Configure a node in the prgateway servlet to connect to a load balancer with SSL.

Root Cause

This is an SSL interoperability issue between the client (the JVM) and the server (load balancer).
After debugging the SSL error, we found the server returned the message "
Unrecognized name". This is linked to a new SSL feature called SNI (server name indication). This feature helps managing certificate on servers.
Starting from Oracle JVM version 7, client jvm has this feature turned on and are sending a hostname to the server (the load balance in this case).
The load balancer didn't recognized the name provided, returned the message and then the client (the JVM) throws the error.

Note: Some users ignore this "". The Oracle JVM version 7 does not.  See Oracle defect "JDK-7127374 " resolved as "not an issue".


This is not a PRPC issue and is entirely environmental.

There are several way to address this:
- Use Oracle JVM 6 or below as it is not using the SNI feature. However it is preferable not to downgrade a JVM and look for other solution.
- Disable SNI on the client jvm by adding the following parameter to your jvm
- Configure the SNI feature on the server (the load balancer in this case).

Suggest Edit

Published February 9, 2016 - Updated October 8, 2020

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