EMQX 使用SSL证书 设备只能注册5000多个到EMQX 再多就会出现异常

MqttException (0) - javax.net.ssl.SSLHandshakeException: Remote host terminated the handshake
        at org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:38)
        at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:738)
        at java.base/java.lang.Thread.run(Thread.java:842)
Caused by: javax.net.ssl.SSLHandshakeException: Remote host terminated the handshake
        at java.base/sun.security.ssl.SSLSocketImpl.handleEOF(SSLSocketImpl.java:1715)
        at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1514)
        at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1421)
        at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:455)
        at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:426)
        at org.eclipse.paho.client.mqttv3.internal.SSLNetworkModule.start(SSLNetworkModule.java:159)
        at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:724)
        ... 1 more
Caused by: java.io.EOFException: SSL peer shut down incorrectly
        at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:489)
        at java.base/sun.security.ssl.SSLSocketInputRecord.readHeader(SSLSocketInputRecord.java:478)
        at java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:160)
        at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:111)
        at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1506)
        ... 6 more
MqttException (0) - javax.net.ssl.SSLHandshakeException: Remote host terminated the handshake
        at org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:38)
        at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:738)
        at java.base/java.lang.Thread.run(Thread.java:842)
Caused by: javax.net.ssl.SSLHandshakeException: Remote host terminated the handshake
        at java.base/sun.security.ssl.SSLSocketImpl.handleEOF(SSLSocketImpl.java:1715)
        at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1514)
        at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1421)
        at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:455)
        at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:426)
        at org.eclipse.paho.client.mqttv3.internal.SSLNetworkModule.start(SSLNetworkModule.java:159)
        at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:724)
        ... 1 more
Caused by: java.io.EOFException: SSL peer shut down incorrectly
        at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:489)
        at java.base/sun.security.ssl.SSLSocketInputRecord.readHeader(SSLSocketInputRecord.java:478)
        at java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:160)
        at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:111)
        at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1506)
        ... 6 more
已断开连接 (32109) - java.io.EOFException
        at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:197)
        at java.base/java.lang.Thread.run(Thread.java:842)
Caused by: java.io.EOFException
        at java.base/java.io.DataInputStream.readByte(DataInputStream.java:273)
        at org.eclipse.paho.client.mqttv3.internal.wire.MqttInputStream.readMqttWireMessage(MqttInputStream.java:92)
        at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:137)
        ... 1 more