这是我的问题：
2018-12-01 16:03:24.634 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.handler.ASRHandler : 收到Up请求, id=76cfe0da-6f09-43ef-91a4-53c395387aa4, ak=ca5a1988599987899435bd51e76e2d5c73605519
2018-12-01 16:03:24.634 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.access.TokenManager : 当前Token: ca5a1988599987899435bd51e76e2d5c73605519, 不存在: false
2018-12-01 16:03:24.650 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 1, 耗时: 16
2018-12-01 16:03:24.651 INFO 11528 --- [pool-1-thread-1] com.asrapi.service.HTTPService : Up上行 POST-ASR开始：1543651404651
2018-12-01 16:03:24.793 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 159
2018-12-01 16:03:24.964 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 330
2018-12-01 16:03:25.138 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 504
2018-12-01 16:03:25.306 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 672
2018-12-01 16:03:25.470 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 836
2018-12-01 16:03:25.641 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 1007
2018-12-01 16:03:25.805 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 1171
2018-12-01 16:03:25.971 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 1337
2018-12-01 16:03:26.110 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.handler.ASRHandler : 收到Down请求, id=76cfe0da-6f09-43ef-91a4-53c395387aa4, ak=ca5a1988599987899435bd51e76e2d5c73605519
2018-12-01 16:03:26.110 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.access.TokenManager : 当前Token: ca5a1988599987899435bd51e76e2d5c73605519, 不存在: false
2018-12-01 16:03:26.110 INFO 11528 --- [pool-1-thread-1] com.asrapi.service.HTTPService : Down下行 POST-ASR开始：1543651406110
2018-12-01 16:03:26.191 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : Down POST-ASR响应总耗时：81
2018-12-01 16:03:26.191 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : http://audiotest.baidu.com/open_asr_test/down?id=76cfe0da-6f09-43ef-91a4-53c395387aa4, resp_code:200
2018-12-01 16:03:26.191 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : http://audiotest.baidu.com/open_asr_test/down?id=76cfe0da-6f09-43ef-91a4-53c395387aa4, resp_message:OK
2018-12-01 16:03:26.191 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : http://audiotest.baidu.com/open_asr_test/down?id=76cfe0da-6f09-43ef-91a4-53c395387aa4, resp_encoding:chunked
2018-12-01 16:03:26.191 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : http://audiotest.baidu.com/open_asr_test/down?id=76cfe0da-6f09-43ef-91a4-53c395387aa4, resp_protocol:http/1.1
2018-12-01 16:03:26.191 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : ASR response, type: 4, time: 1543651406191
2018-12-01 16:03:36.090 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : ASR response, type: 5, time: 1543651416090
2018-12-01 16:03:36.090 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.utils.ASRUtil : Web response type: 5
2018-12-01 16:03:36.091 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.utils.ASRUtil : Last NLU response type: 5
id: "76cfe0da-6f09-43ef-91a4-53c395387aa4"
err_no: -3001
err_msg: "server read sdk error, not ltv struct"
last <
>
2018-12-01 16:03:36.093 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 11459
2018-12-01 16:03:36.093 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 11459
2018-12-01 16:03:36.093 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 11459
2018-12-01 16:03:36.093 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 11459
2018-12-01 16:03:36.093 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 11459
2018-12-01 16:03:36.093 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 2, 耗时: 11459
2018-12-01 16:03:36.093 INFO 11528 --- [ XNIO-1 I/O-1] com.asrapi.service.HTTPService : receive msg: 3, 耗时: 11459
2018-12-01 16:03:36.110 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : http://audiotest.baidu.com/open_asr_test/down?id=76cfe0da-6f09-43ef-91a4-53c395387aa4, response text:
2018-12-01 16:03:36.126 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : Up POST-ASR响应总耗时：11475
2018-12-01 16:03:36.126 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : http://audiotest.baidu.com/open_asr_test/up?id=76cfe0da-6f09-43ef-91a4-53c395387aa4, resp_code:200
2018-12-01 16:03:36.126 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : http://audiotest.baidu.com/open_asr_test/up?id=76cfe0da-6f09-43ef-91a4-53c395387aa4, resp_message:OK
2018-12-01 16:03:36.126 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : http://audiotest.baidu.com/open_asr_test/up?id=76cfe0da-6f09-43ef-91a4-53c395387aa4, resp_encoding:null
2018-12-01 16:03:36.126 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : http://audiotest.baidu.com/open_asr_test/up?id=76cfe0da-6f09-43ef-91a4-53c395387aa4, resp_protocol:http/1.1
2018-12-01 16:03:36.126 INFO 11528 --- [t.baidu.com/...] com.asrapi.service.HTTPService : http://audiotest.baidu.com/open_asr_test/up?id=76cfe0da-6f09-43ef-91a4-53c395387aa4, response text:
从上面的日志中，我们可以看到“ Down”请求挂断了“ Up”请求，并且在“ Dwon”请求完成后继续执行“ Up”请求。
问题1 ：我想知道为什么挂起了请求。
问题2 ：我想知道为什么要用同一个NIO线程处理两个请求。
问题3 ：我想知道为什么Undertow仅剩一个NIO线程，而为什么不阻止外部的“ dwon”请求，或者为什么Udertow做如果Undertow仍然有更多NIO线程，则不要使用两个NIO线程来处理“上”和“下”请求。
据我所知，Undertow NIO线程= CPU内核，所以我的spring-webflux项目中至少应有4个NIO线程。