调用https://open.weixin.qq.com/connect/oauth2/authorize api时偶尔报javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake错误，这几天报错频繁些。jdk版本是1.7，设置的信任证书和设置了TLSv1.2版本。平均几天会出现2到3次，请问是什么原因？

我们生产环境，在微信支付时，抛出异常：（用的是CloseablehttpClient连接，这是个偶发现象） System Exception:javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake     at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:992)     at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)     at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)     at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)     at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:396)     at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:355)     at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)     at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:373)     at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:381)     at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:237)     at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)     at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)     at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)     at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)     at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)     at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)     at com.ms.config.wx.sdk.WeChatUtil.processHttpPost(WeChatUtil.java:555)     at com.ms.config.wx.sdk.WeChatUtil.unifiedorder(WeChatUtil.java:135)     at com.ms.tpp.service.handler.wechat.WechatMiniProgramPaymentServiceImpl.pay(WechatMiniProgramPaymentServiceImpl.java:78) 网上查了下设置系统参数，System.setProperty("https.protocols", "TLSv1,TLSv1.1,TLSv1.2");升级JDK版本等 但这是个偶发现象，如果可以都可以，如果不可以都不可以，应该不是上面的方法能解决的。有大侠遇到过吗？要怎样解决呢？