Symptoms
The Analytics Agent startup fails with the following error in the Analytics Agent logs:
[2017-06-02T13:09:47,657+02:00] [ERROR] [analytics-agent-sync-thread-0] [c.a.a.agent.sync.ErrorMessageHelper] Analytics agent failed to connect to the controller registration endpoint.
com.appdynamics.analytics.shared.rest.exceptions.ClientException: Could not execute request to https://<controller host>/rest/analytics/agent/register
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Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Diagnosis
The issue occurs when using a self-signed certificate for the Controller.
The Analytics Agent uses a truststore for the JRE to validate the certificate of the connecting server. The truststore does not have self-signed certificates added to the store by default.
Solution
Import the client certificate to the JRE truststore, which is located in the Java directory used by the Analytics Agentby default.
Example: JAVA_HOME/lib/security/cacerts
