All of a sudden, over the past few days, my Ecobee Suite is experiencing frequent exceptions when it tries to contact https://api.ecobee.com. These generally recover within 15-60 seconds if I retry the call every 15 seconds, so I know the arguments to the calls are properly formed.
The specific errors I am seeing are:
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javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException:unable to find valid certification path to requested target javax.net.ssl.SSLPeerUnverifiedException
From what I can tell, these are temporary in nature, as a retry often succeeds.
Given the frequency these are occurring, its probably something SmartThings needs to look into…