javax.net.ssl|DEBUG|B3|nioEventLoopGroup-4-1|2020-09-24 14:26:06.591 CEST|SSLEngineInputRecord.java:214|READ: TLSv1.2 handshake, length = 3307
javax.net.ssl|DEBUG|B3|nioEventLoopGroup-4-1|2020-09-24 14:26:06.591 CEST|CertificateMessage.java:357|Consuming server Certificate handshake message (
"Certificates": [
  "certificate" : {
    "version"            : "v3",
    "serial number"      : "2B D3 CA 24 E7 85 7C CC",
    "signature algorithm": "SHA256withRSA",
    "issuer"             : "EMAILADDRESS=support@fortinet.com, CN=FGT80ETK18004392, OU=Certificate Authority, O=Fortinet, L=Sunnyvale, ST=California, C=US",
    "not before"         : "2019-03-14 18:50:10.000 CET",
    "not  after"         : "2021-04-12 19:50:10.000 CEST",
    "subject"            : "C=US, ST=California, O=Apple Inc., OU="management:idms.group.533599                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              ", CN=api.push.apple.com",
    "subject public key" : "RSA",
    "extensions"         : [
      {
        ObjectId: 2.5.29.19 Criticality=true
        BasicConstraints:[
          CA:false
          PathLen: undefined
        ]
      },
      {
        ObjectId: 2.5.29.15 Criticality=true
        KeyUsage [
          DigitalSignature
          Key_Encipherment
        ]
      },
      {
        ObjectId: 2.5.29.17 Criticality=false
        SubjectAlternativeName [
          DNSName: api.push.apple.com
          DNSName: api-carry.push.apple.com
          DNSName: mr-api.push.apple.com
          DNSName: pv-api.push.apple.com
          DNSName: st-api.push.apple.com
        ]
      }
    ]}
]
)
javax.net.ssl|ERROR|B3|nioEventLoopGroup-4-1|2020-09-24 14:26:06.595 CEST|TransportContext.java:312|Fatal (CERTIFICATE_UNKNOWN): PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target (
"throwable" : {
  sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
...