SSL - SSLHandshakeException: Unrecognized SSL message, plaintext connection?

一、异常日志

 

javax.net.ssl.SSLHandshakeException: SSL handshake failed.
    Caused by: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
        at com.sun.net.ssl.internal.ssl.EngineInputRecord.bytesInCompletePacket(EngineInputRecord.java:152)
        at com.sun.net.ssl.internal.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:806)
        at com.sun.net.ssl.internal.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:721)
        at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:607)
        at org.apache.mina.filter.ssl.SslHandler.unwrap(SslHandler.java:725)
        at org.apache.mina.filter.ssl.SslHandler.unwrapHandshake(SslHandler.java:663)
        at org.apache.mina.filter.ssl.SslHandler.handshake(SslHandler.java:549)
        at org.apache.mina.filter.ssl.SslHandler.messageReceived(SslHandler.java:349)
        at org.apache.mina.filter.ssl.SslFilter.messageReceived(SslFilter.java:476)
        ... 15 more

 

二、问题原因

    客户端产生该异常，是因为对方提供的不是 https 服务的端口
    服务端产生该异常，是因为客户端以 http 协议访问服务端的 https 服务