PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is javax.net.ssl.SSLHandshakeException:

[VinayKumarS]

Certificate issue for oauth.

I have implemented commercewebservices. Using another java program i wants to authenticate and send some data. But while i am authenticating i am getting below error. Can someone help me on this.

 dHJ1c3RlZF9jbGllbnQ9c2VjcmV0
 21:31:20.026 [main] DEBUG org.springframework.web.client.RestTemplate - Created POST request for "https://localhost:9002/authorizationserver/oauth/token?client_id=trusted_client&client_secret=secret&grant_type=client_credentials&username=mark.rivers@rustic-hw.com&password=12341234"
 21:31:20.033 [main] DEBUG org.springframework.web.client.RestTemplate - Setting request Accept header to [text/plain, application/json, application/*+json, */*]
 Exception in thread "main" org.springframework.web.client.ResourceAccessException: I/O error on POST request for "https://localhost:9002/authorizationserver/oauth/token": sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is 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
     at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:666)
     at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:613)
     at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:531)
     at com.javainuse.SpringBootResourceServerApplication.main(SpringBootResourceServerApplication.java:54)
 Caused by: 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
     at sun.security.ssl.Alerts.getSSLException(Unknown Source)
     at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
     at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
     at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
     at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
     at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
     at sun.security.ssl.Handshaker.processLoop(Unknown Source)
     at sun.security.ssl.Handshaker.process_record(Unknown Source)
     at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
     at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
     at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
     at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
     at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
     at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
     at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source)
     at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:78)
     at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
     at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53)
     at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:652)
     ... 3 more
 Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
     at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
     at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
     at sun.security.validator.Validator.validate(Unknown Source)
     at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
     at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
     at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
     ... 18 more
 Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
     at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
     at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
     at java.security.cert.CertPathBuilder.build(Unknown Source)
     ... 24 more
 

[dhanashreesole]

Were you able to get past this? What was your resolution?