调用sdk请求微信第一次均失败，第二次正常什么原因？

[1135831485]

org.apache.http.NoHttpResponseException: api.weixin.qq.com:443 failed to respond
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:143) ~[httpclient-4.4.jar:4.4]
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:57) ~[httpclient-4.4.jar:4.4]
at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:261) ~[httpcore-4.4.jar:4.4]
at org.apache.http.impl.DefaultBHttpClientConnection.receiveResponseHeader(DefaultBHttpClientConnection.java:165) ~[httpcore-4.4.jar:4.4]
at org.apache.http.impl.conn.CPoolProxy.receiveResponseHeader(CPoolProxy.java:167) ~[httpclient-4.4.jar:4.4]
at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:272) ~[httpcore-4.4.jar:4.4]
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:124) ~[httpcore-4.4.jar:4.4]
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:271) ~[httpclient-4.4.jar:4.4]
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184) ~[httpclient-4.4.jar:4.4]
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88) ~[httpclient-4.4.jar:4.4]
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[httpclient-4.4.jar:4.4]
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) ~[httpclient-4.4.jar:4.4]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) ~[httpclient-4.4.jar:4.4]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107) ~[httpclient-4.4.jar:4.4]
at com.riversoft.weixin.common.WxClient.httpPost(WxClient.java:346) [weixin-common-0.9.4.jar:na]
at com.riversoft.weixin.common.WxClient.post(WxClient.java:293) [weixin-common-0.9.4.jar:na]
at com.riversoft.weixin.mp.template.Templates.send(Templates.java:129) [weixin-mp-0.9.4.jar:na]
at com.chuyan.service.WeixinTemplateNotifyService.sendTemplateNotify(WeixinTemplateNotifyService.java:51) [classes/:na]
at com.chuyan.service.TakeOrderService.cancelOrder(TakeOrderService.java:156) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_79]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_79]

[borball]

Can you please share your code and the full stack trace? @1135831485