When customer is running a Java store application, sometimes you will get this exception:

sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: java.io.IOException: Response is unreliable: its validity interval is out-of-date
    at sun.security.validator.PKIXValidator.doValidate(Unknown Source)
    at sun.security.validator.PKIXValidator.doValidate(Unknown Source)
    at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
    at sun.security.validator.Validator.validate(Unknown Source)
    at sun.security.validator.Validator.validate(Unknown Source)
    at com.sun.deploy.security.TrustDecider.isAllPermissionGranted(Unknown Source)
    at com.sun.javaws.security.AppPolicy.grantUnrestrictedAccess(Unknown Source)
    at com.sun.javaws.LaunchDownload.checkSignedResourcesHelper(Unknown Source)
    at com.sun.javaws.LaunchDownload.checkSignedResources(Unknown Source)
    at com.sun.javaws.Launcher.prepareLaunchFile(Unknown Source)
    at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
    at com.sun.javaws.Launcher.launch(Unknown Source)
    at com.sun.javaws.Main.launchApp(Unknown Source)
    at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
    at com.sun.javaws.Main$1.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.security.cert.CertPathValidatorException: java.io.IOException: Response is unreliable: its validity interval is out-of-date
    at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(Unknown Source)
    at sun.security.provider.certpath.PKIXCertPathValidator.doValidate(Unknown Source)
    at sun.security.provider.certpath.PKIXCertPathValidator.engineValidate(Unknown Source)
    at java.security.cert.CertPathValidator.validate(Unknown Source)
    ... 16 more
Caused by: java.io.IOException: Response is unreliable: its validity interval is out-of-date
    at sun.security.provider.certpath.OCSPResponse$SingleResponse.<init>(Unknown Source)
    at sun.security.provider.certpath.OCSPResponse$SingleResponse.<init>(Unknown Source)
    at sun.security.provider.certpath.OCSPResponse.<init>(Unknown Source)
    at sun.security.provider.certpath.OCSPChecker.check(Unknown Source)
    ... 20 more

This is due to the system clock on user's machine doesn't setup correctly.

The Java store application is signed by Sun pre-trusted certificate, which is going to check revocation OCSP by default, if the system clock isn't setup correctly, it will throw the above exception occasionally.