Java 为什么Apache HttpClient 4.5.2在非响应http代理上不超时，而是阻止流读取？

简而言之：我想测试一些http代理。我遇到了一个似乎没有响应的代理，但是HttpClient并没有像它应该的那样超时。Stacktrace显示应用程序在读取方法时被阻止。它应该超时，但它不是。一般来说，代码经过测试，在很多其他情况下（包括超时、异常等）都能正常工作

我如何配置我的请求（是的，我在请求执行时使用它们）：

HttpClient正在执行的操作-已发送请求但没有响应：

09:55:06.719 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG o.a.h.c.protocol.RequestAddCookies - CookieSpec selected: default
09:55:06.720 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG o.a.h.c.protocol.RequestAuthCache - Auth cache not set in the context
09:55:06.721 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG o.a.h.i.c.PoolingHttpClientConnectionManager - Connection request: [route: {tls}->http://84.28.86.73:80->https://api.ipify.org:443][total kept alive: 0; route allocated: 0 of 2; total allocated: 0 of 20]
09:55:06.722 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG o.a.h.i.c.PoolingHttpClientConnectionManager - Connection leased: [id: 19][route: {tls}->http://84.28.86.73:80->https://api.ipify.org:443][total kept alive: 0; route allocated: 1 of 2; total allocated: 1 of 20]
09:55:06.723 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG o.a.h.impl.execchain.MainClientExec - Opening connection {tls}->http://84.28.86.73:80->https://api.ipify.org:443
09:55:06.723 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG o.a.h.i.c.DefaultHttpClientConnectionOperator - Connecting to /84.28.86.73:80
09:55:06.786 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG o.a.h.i.c.DefaultHttpClientConnectionOperator - Connection established 192.168.2.144:31914<->84.28.86.73:80
09:55:06.787 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG org.apache.http.headers - http-outgoing-19 >> CONNECT api.ipify.org:443 HTTP/1.1
09:55:06.787 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG org.apache.http.headers - http-outgoing-19 >> Host: api.ipify.org
09:55:06.788 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG org.apache.http.headers - http-outgoing-19 >> User-Agent: Apache-HttpClient/4.5.2 (Java/1.8.0_66)
09:55:06.788 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG org.apache.http.wire - http-outgoing-19 >> "CONNECT api.ipify.org:443 HTTP/1.1[\r][\n]"
09:55:06.788 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG org.apache.http.wire - http-outgoing-19 >> "Host: api.ipify.org[\r][\n]"
09:55:06.789 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG org.apache.http.wire - http-outgoing-19 >> "User-Agent: Apache-HttpClient/4.5.2 (Java/1.8.0_66)[\r][\n]"
09:55:06.789 [ProxyPool-ScheduledWorkers-pool-3-thread-1] DEBUG org.apache.http.wire - http-outgoing-19 >> "[\r][\n]"

09:55:06.719[ProxyPool-ScheduledWorkers-pool-3-thread-1]调试o.a.h.c.protocol.RequestAddCookies-CookieSpec已选择：默认值
09:55:06.720[ProxyPool-ScheduledWorkers-pool-3-thread-1]调试o.a.h.c.protocol.RequestAuthCache-未在上下文中设置验证缓存
09:55:06.721[ProxyPool-ScheduledWorkers-pool-3-thread-1]调试o.a.h.i.c.PoollightTPClientConnectionManager-连接请求：[路由：{tls}->http://84.28.86.73:80->https://api.ipify.org:443][保持活动状态的总数：0；分配的路由：0，共2条；分配的总数：0，共20条]
09:55:06.722[ProxyPool-ScheduledWorkers-pool-3-thread-1]调试o.a.h.i.c.PoollightTPClientConnectionManager-租用连接：[id:19][路由：{tls}->http://84.28.86.73:80->https://api.ipify.org:443][保持活动状态的总数：0；分配的路由：1/2；分配的总数：1/20]
09:55:06.723[ProxyPool-ScheduledWorkers-pool-3-thread-1]调试o.a.h.impl.execchain.MainClientExec-打开连接{tls}->http://84.28.86.73:80->https://api.ipify.org:443
09:55:06.723[ProxyPool-ScheduledWorkers-pool-3-thread-1]调试o.a.h.i.c.DefaultHttpClientConnectionOperator-连接到/84.28.86.73:80
09:55:06.786[ProxyPool-ScheduledWorkers-pool-3-thread-1]调试o.a.h.i.c.DefaultHttpClientConnectionOperator-已建立连接192.168.2.144:3191484.28.86.73:80
09:55:06.787[ProxyPool-ScheduledWorkers-pool-3-thread-1]DEBUG org.apache.http.headers-http-outing-19>>CONNECT-api.ipify.org:443 http/1.1
09:55:06.787[ProxyPool-ScheduledWorkers-pool-3-thread-1]调试org.apache.http.headers-http-outing-19>>主机：api.ipify.org
09:55:06.788[ProxyPool-ScheduledWorkers-pool-3-thread-1]DEBUG org.apache.http.headers-http-outing-19>>用户代理：apache HttpClient/4.5.2（Java/1.8.066）
09:55:06.788[ProxyPool-ScheduledWorkers-pool-3-thread-1]DEBUG org.apache.http.wire-http-outing-19>>“CONNECT api.ipify.org:443 http/1.1[\r][\n]”
09:55:06.788[ProxyPool-ScheduledWorkers-pool-3-thread-1]DEBUG org.apache.http.wire-http-outing-19>>“主机：api.ipify.org[\r][\n]”
09:55:06.789[ProxyPool-ScheduledWorkers-pool-3-thread-1]DEBUG org.apache.http.wire-http-outing-19>>“用户代理：apache HttpClient/4.5.2（Java/1.8.066）[\r][\n]”
09:55:06.789[ProxyPool-ScheduledWorkers-pool-3-thread-1]DEBUG org.apache.http.wire-http-outing-19>“[\r][\n]”

这是连接被阻塞的stackrace

Thread [ProxyPool-ScheduledWorkers-pool-3-thread-1] (Suspended) 
SocketInputStream.socketRead0(FileDescriptor, byte[], int, int, int) line: not available [native method]    
SocketInputStream.socketRead(FileDescriptor, byte[], int, int, int) line: not available 
SocketInputStream.read(byte[], int, int, int) line: not available   
SocketInputStream.read(byte[], int, int) line: not available    
LoggingInputStream.read(byte[], int, int) line: 87  
SessionInputBufferImpl.streamRead(byte[], int, int) line: 139   
SessionInputBufferImpl.fillBuffer() line: 155   
SessionInputBufferImpl.readLine(CharArrayBuffer) line: 284  
DefaultHttpResponseParser.parseHead(SessionInputBuffer) line: 140   
DefaultHttpResponseParser.parseHead(SessionInputBuffer) line: 57    
DefaultHttpResponseParser(AbstractMessageParser<T>).parse() line: 261   
LoggingManagedHttpClientConnection(DefaultBHttpClientConnection).receiveResponseHeader() line: 165  
CPoolProxy.receiveResponseHeader() line: 167    
HttpRequestExecutor.doReceiveResponse(HttpRequest, HttpClientConnection, HttpContext) line: 272 
HttpRequestExecutor.execute(HttpRequest, HttpClientConnection, HttpContext) line: 124   
MainClientExec.createTunnelToTarget(AuthState, HttpClientConnection, HttpRoute, HttpRequest, HttpClientContext) line: 472   
MainClientExec.establishRoute(AuthState, HttpClientConnection, HttpRoute, HttpRequest, HttpClientContext) line: 397 
MainClientExec.execute(HttpRoute, HttpRequestWrapper, HttpClientContext, HttpExecutionAware) line: 236  
ProtocolExec.execute(HttpRoute, HttpRequestWrapper, HttpClientContext, HttpExecutionAware) line: 184    
RedirectExec.execute(HttpRoute, HttpRequestWrapper, HttpClientContext, HttpExecutionAware) line: 110    
InternalHttpClient.doExecute(HttpHost, HttpRequest, HttpContext) line: 184  
InternalHttpClient(CloseableHttpClient).execute(HttpUriRequest, HttpContext) line: 82   
InternalHttpClient(CloseableHttpClient).execute(HttpUriRequest, HttpContext) line: 55   
Ipify.getExternalIp(HttpClient, RequestConfig, HttpContext) line: 48    
Ipify.getExternalIp(HttpClient, HttpContext) line: 33   
<obsolete method in<unknown declaring type>>    
ProxyTester.isHttpsProxyValidQuiet(HttpsProxyHost) line: 105    
FetchProxiesFromSourceTask.run() line: 72   
Executors$RunnableAdapter<T>.call() line: not available 
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>(FutureTask<V>).runAndReset() line: not available 
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>.access$301(ScheduledThreadPoolExecutor$ScheduledFutureTask) line: not available  
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>.run() line: not available    
ScheduledThreadPoolExecutor(ThreadPoolExecutor).runWorker(ThreadPoolExecutor$Worker) line: not available    
ThreadPoolExecutor$Worker.run() line: not available 
Thread.run() line: not available    

Thread[ProxyPool-ScheduledWorkers-pool-3-Thread-1]（挂起）
SocketInputStream.socketRead0（文件描述符，字节[]，int，int，int）行：不可用[本机方法]
SocketInputStream.socketRead（文件描述符，字节[]，int，int，int）行：不可用
SocketInputStream.read（字节[]，int，int，int）行：不可用
SocketInputStream.read（字节[]，int，int）行：不可用
LoggingInputStream.read（字节[]，int，int）行：87
SessionInputBufferImpl.streamRead（字节[]，int，int）行：139
SessionInputBufferImpl.fillBuffer（）行：155
SessionInputBufferImpl.readLine（CharArrayBuffer）行：284
DefaultHttpResponseParser.parseHead（SessionInputBuffer）行：140
DefaultHttpResponseParser.parseHead（SessionInputBuffer）行：57
DefaultHttpResponseParser（AbstractMessageParser）.parse（）行：261
LoggingManagedHTTPClient连接（默认BHTTPClientConnection）。接收方负责人（）行：165
CPoolProxy.receiveResponseHeader（）行：167
HttpRequestExecutor.doReceiveResponse（HttpRequest、HttpClientConnection、HttpContext）行：272
执行（HttpRequest、HttpClientConnection、HttpContext）行：124
MainClientExec.createTunnelToTarget（AuthState、HttpClientConnection、HttpRoute、HttpRequest、HttpClientContext）行：472
MainClientExec.establishRoute（AuthState、HttpClientConnection、HttpRoute、HttpRequest、HttpClientContext）行：397
MainClientExec.execute（HttpRoute，HttpRequestWrapper，HttpClientContext，HttpExecutionAware）行：236
ProtocolExec.execute（HttpRoute，HttpRequestWrapper，HttpClientContext，HttpExecutionAware）行：184
执行（HttpRoute，HttpRequestWrapper，HttpClientContext，HttpExecutionAware）行：110
InternalHttpClient.doExecute（HttpHost、HttpRequest、HttpContext）行：184
InternalHttpClient（CloseableHttpClient）.execute（HttpUriRequest，HttpContext）行：82
InternalHttpClient（CloseableHttpClient）.execute（HttpUriRequest，HttpContext）行：55
getExternalIp（HttpClient、RequestConfig、HttpContext）行：48
getExternalIp（HttpClient，HttpContext）行：33
ProxyTester.IsHttpProxyValidQuiet（HttpProxyHost）线路：105
FetchProxiesFromSourceTask.run（）行：72
Executors$RunnableAdapter.call（）行：不可用
ScheduledThreadPoolExecutor$ScheduledFutureTask（FutureTask）。runAndReset（）行：不可用
ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301（ScheduledThreadPoolExecutor$ScheduledFutureTask）行：不可用
ScheduledThreadPoolExecutor$ScheduledFutureTask.run（）行：不可用
ScheduledThreadPoolExecutor（ThreadPoolExecutor）.runWorker（ThreadPoolExecutor$Worker）行：不可用
ThreadPoolExecutor$Worker.run（）行：不可用
Thread.run（）行：不可用

编辑：荣誉奖：

在我看来，这是一个设计缺陷，因为无法根据请求设置

soTimeout

之前的SSL握手

并在此处报告错误：

Thread [ProxyPool-ScheduledWorkers-pool-3-thread-1] (Suspended) 
SocketInputStream.socketRead0(FileDescriptor, byte[], int, int, int) line: not available [native method]    
SocketInputStream.socketRead(FileDescriptor, byte[], int, int, int) line: not available 
SocketInputStream.read(byte[], int, int, int) line: not available   
SocketInputStream.read(byte[], int, int) line: not available    
LoggingInputStream.read(byte[], int, int) line: 87  
SessionInputBufferImpl.streamRead(byte[], int, int) line: 139   
SessionInputBufferImpl.fillBuffer() line: 155   
SessionInputBufferImpl.readLine(CharArrayBuffer) line: 284  
DefaultHttpResponseParser.parseHead(SessionInputBuffer) line: 140   
DefaultHttpResponseParser.parseHead(SessionInputBuffer) line: 57    
DefaultHttpResponseParser(AbstractMessageParser<T>).parse() line: 261   
LoggingManagedHttpClientConnection(DefaultBHttpClientConnection).receiveResponseHeader() line: 165  
CPoolProxy.receiveResponseHeader() line: 167    
HttpRequestExecutor.doReceiveResponse(HttpRequest, HttpClientConnection, HttpContext) line: 272 
HttpRequestExecutor.execute(HttpRequest, HttpClientConnection, HttpContext) line: 124   
MainClientExec.createTunnelToTarget(AuthState, HttpClientConnection, HttpRoute, HttpRequest, HttpClientContext) line: 472   
MainClientExec.establishRoute(AuthState, HttpClientConnection, HttpRoute, HttpRequest, HttpClientContext) line: 397 
MainClientExec.execute(HttpRoute, HttpRequestWrapper, HttpClientContext, HttpExecutionAware) line: 236  
ProtocolExec.execute(HttpRoute, HttpRequestWrapper, HttpClientContext, HttpExecutionAware) line: 184    
RedirectExec.execute(HttpRoute, HttpRequestWrapper, HttpClientContext, HttpExecutionAware) line: 110    
InternalHttpClient.doExecute(HttpHost, HttpRequest, HttpContext) line: 184  
InternalHttpClient(CloseableHttpClient).execute(HttpUriRequest, HttpContext) line: 82   
InternalHttpClient(CloseableHttpClient).execute(HttpUriRequest, HttpContext) line: 55   
Ipify.getExternalIp(HttpClient, RequestConfig, HttpContext) line: 48    
Ipify.getExternalIp(HttpClient, HttpContext) line: 33   
<obsolete method in<unknown declaring type>>    
ProxyTester.isHttpsProxyValidQuiet(HttpsProxyHost) line: 105    
FetchProxiesFromSourceTask.run() line: 72   
Executors$RunnableAdapter<T>.call() line: not available 
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>(FutureTask<V>).runAndReset() line: not available 
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>.access$301(ScheduledThreadPoolExecutor$ScheduledFutureTask) line: not available  
ScheduledThreadPoolExecutor$ScheduledFutureTask<V>.run() line: not available    
ScheduledThreadPoolExecutor(ThreadPoolExecutor).runWorker(ThreadPoolExecutor$Worker) line: not available    
ThreadPoolExecutor$Worker.run() line: not available 
Thread.run() line: not available