Lookup failed: javax.naming.CommunicationException: simple bind failed: Samba4サーバ:636 [Root 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] 結果からの推測ですが、デフォルトのキーストア(jre/lib/security/cacrts)であってもVM引数かJAVA_OPTSで
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