在执行了一次300个点的两两之间的共同关系查询之后，数据库过了一段时间不能访问，之后我设置了事物超时提交dbms.transaction.timeout=180s，重启之后再次执行复杂查询数据库暂时没有出现不能访问的情况，但是所有查询速度都变慢了，并且debug.log日志文件出现下面的报错，请教一下是什么原因引起的报错，有什么好的的解决办法吗？

2018-10-11 09:36:22.535+0000 ERROR [o.n.b.t.TransportSelectionHandler] Fatal error occurred during protocol selection for connection: [id: 0x78323962, L:/192.168.7.178:7688 ! R:/192.168.7.178:10861] javax.net.ssl.SSLException: Received close_notify during handshake
io.netty.handler.codec.DecoderException: javax.net.ssl.SSLException: Received close_notify during handshake
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:459)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
	at io.netty.handler.codec.ByteToMessageDecoder.handlerRemoved(ByteToMessageDecoder.java:236)
	at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:494)
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:428)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
	at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965)
	at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:808)
	at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:404)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:304)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
	at java.lang.Thread.run(Thread.java:748)
Caused by: javax.net.ssl.SSLException: Received close_notify during handshake
	at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
	at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1666)
	at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1634)
	at sun.security.ssl.SSLEngineImpl.recvAlert(SSLEngineImpl.java:1776)
	at sun.security.ssl.SSLEngineImpl.readRecord(SSLEngineImpl.java:1083)
	at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:907)
	at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:781)
	at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624)
	at io.netty.handler.ssl.SslHandler$SslEngineType$3.unwrap(SslHandler.java:294)
	at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1275)
	at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1177)
	at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1221)
	at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:489)
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:428)
	... 24 more