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  1. ,
    Expert tip

    If you're using wiremock, configure your code to accept wiremock self-signed certificate or create a keystore and certificate that are trusted by your HTTP client and configure wiremock to use that

  2. ,
    via Stack Overflow by carlos

    Set the mail.smtp.ssl.trust system property to an smtp host, like smtp.gmail.com.

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sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
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sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
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sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
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sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)	at java.security.cert.CertPathBuilder.build(Unknown Source)	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)	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.http.HttpURLConnection.getInputStream(Unknown Source)	at java.net.HttpURLConnection.getResponseCode(Unknown Source)	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)	at org.eclipse.egit.github.core.client.GitHubClient.get(GitHubClient.java:733)	at org.eclipse.egit.github.core.client.PageIterator.next(PageIterator.java:173)	at org.eclipse.egit.github.core.service.GitHubService.getAll(GitHubService.java:151)	at org.eclipse.egit.github.core.service.GitHubService.getAll(GitHubService.java:135)	at org.eclipse.egit.github.core.service.LabelService.getLabels(LabelService.java:90)	at org.eclipse.egit.github.core.service.LabelService.getLabels(LabelService.java:79)	at org.eclipse.mylyn.internal.github.core.issue.IssueConnector.refreshLabels(IssueConnector.java:146)	at org.eclipse.mylyn.internal.github.core.issue.IssueConnector.updateRepositoryConfiguration(IssueConnector.java:409)	at org.eclipse.mylyn.internal.tasks.core.sync.UpdateRepositoryConfigurationJob.run(UpdateRepositoryConfigurationJob.java:46)	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)