I am trying to make a apex callout from salesforce to external system which is hosted inside in corporate firewall. Firewall sends the request to load-balancer which sends the request to appropriate web server.
I am getting below exception when trying this call from salesforce while I can getting correct response while making a callout from SOAP UI.
As per my client they don't provide any certificate. I am not sure what is happening and how to resolve the issue. As per log it seems like I need to install the certificates.
Any help would be appreciated.
Log -
[51]|System.HttpRequest[Endpoint=https://someURL/servlet/request, Method=POST]
07:51:12.268 (268755208)|CALLOUT_REQUEST|[51]|System.HttpRequest retrying request in response to handshake failure: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
07:51:12.423 (423017546)|EXCEPTION_THROWN|[51]|System.CalloutException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
07:51:12.423 (423110461)|SYSTEM_METHOD_EXIT|[51]|System.Http.send(ANY)