Java 重用HttpClient https连接时出现异常

我正在使用ApacheHttpClient。在调试某些东西时，我发现在使用相同的连接（连接保持活动）第二次执行相同的HTTPS头请求时出错。主持人是。我不知道哪里出了问题，是服务器吗？这是一个HttpClient错误吗？我倾向于认为这是某个地方的HttpClient错误。不管怎样，我想知道是否有人能给我指出正确的方向。以下是代码和日志信息：

import org.apache.http.HttpHost;
import org.apache.http.client.methods.HttpHead;
import org.apache.http.client.params.ClientPNames;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.junit.Test;

import java.io.IOException;

/**
 * Created with IntelliJ IDEA.
 * User: dongsheng
 * Date: 1/10/13
 * Time: 4:10 PM
 * To change this template use File | Settings | File Templates.
 */
public class HttpClientTest {

    private int connectionTimeout = 1000;
    private int socketTimeout = 10000;
    private String host = "dongshengcn.iriscouch.com";
//    private String host = "dongshengcn.cloudant.com";
    private int port = 443;
    boolean useExpectContinue = true;

    public DefaultHttpClient configureClient() {
        HttpParams params = new BasicHttpParams();
        HttpProtocolParams.setUseExpectContinue(params, useExpectContinue);
        HttpConnectionParams
                .setConnectionTimeout(params, connectionTimeout);
        HttpConnectionParams.setSoTimeout(params, socketTimeout);
        HttpConnectionParams.setTcpNoDelay(params, Boolean.TRUE);

        String protocol = "https";
        params.setParameter(ClientPNames.DEFAULT_HOST, new HttpHost(host,
                port, protocol));
        DefaultHttpClient client = new DefaultHttpClient(params);

        return client;
    }

    @Test
    public void test_dafault_http_client() throws IOException {
        String uri = "/ektorp-test/";
        DefaultHttpClient client = configureClient();

        org.apache.http.HttpResponse rsp = client.execute(new HttpHead(uri));
        System.out.println(rsp.toString());

        try {
            org.apache.http.HttpResponse rsp2 = client.execute(new HttpHead(uri));
            System.out.println(rsp.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}



Running HttpClientTest
2013/01/11 10:12:05:288 EST [DEBUG] BasicClientConnectionManager - Get connection for route {s}->https://dongshengcn.iriscouch.com:443
2013/01/11 10:12:06:065 EST [DEBUG] DefaultClientConnectionOperator - Connecting to dongshengcn.iriscouch.com:443
2013/01/11 10:12:07:201 EST [DEBUG] RequestAddCookies - CookieSpec selected: best-match
2013/01/11 10:12:07:223 EST [DEBUG] RequestAuthCache - Auth cache not set in the context
2013/01/11 10:12:07:223 EST [DEBUG] RequestTargetAuthentication - Target auth state: UNCHALLENGED
2013/01/11 10:12:07:224 EST [DEBUG] RequestProxyAuthentication - Proxy auth state: UNCHALLENGED
2013/01/11 10:12:07:224 EST [DEBUG] DefaultHttpClient - Attempt 1 to execute request
2013/01/11 10:12:07:224 EST [DEBUG] DefaultClientConnection - Sending request: HEAD /ektorp-test/ HTTP/1.1
2013/01/11 10:12:07:226 EST [DEBUG] headers - >> HEAD /ektorp-test/ HTTP/1.1
2013/01/11 10:12:07:226 EST [DEBUG] headers - >> Host: dongshengcn.iriscouch.com:443
2013/01/11 10:12:07:226 EST [DEBUG] headers - >> Connection: Keep-Alive
2013/01/11 10:12:07:303 EST [DEBUG] DefaultClientConnection - Receiving response: HTTP/1.1 404 Host not found
2013/01/11 10:12:07:304 EST [DEBUG] headers - << HTTP/1.1 404 Host not found
2013/01/11 10:12:07:304 EST [DEBUG] headers - << Content-Length: 14
2013/01/11 10:12:07:307 EST [DEBUG] DefaultHttpClient - Connection can be kept alive indefinitely
2013/01/11 10:12:07:309 EST [DEBUG] BasicClientConnectionManager - Releasing connection org.apache.http.impl.conn.ManagedClientConnectionImpl@21cc5069
2013/01/11 10:12:07:309 EST [DEBUG] BasicClientConnectionManager - Connection can be kept alive indefinitely
HTTP/1.1 404 Host not found [Content-Length: 14]
2013/01/11 10:12:07:309 EST [DEBUG] BasicClientConnectionManager - Get connection for route {s}->https://dongshengcn.iriscouch.com:443
2013/01/11 10:12:07:310 EST [DEBUG] DefaultHttpClient - Stale connection check
2013/01/11 10:12:07:311 EST [DEBUG] RequestAddCookies - CookieSpec selected: best-match
2013/01/11 10:12:07:311 EST [DEBUG] RequestAuthCache - Auth cache not set in the context
2013/01/11 10:12:07:311 EST [DEBUG] RequestTargetAuthentication - Target auth state: UNCHALLENGED
2013/01/11 10:12:07:311 EST [DEBUG] RequestProxyAuthentication - Proxy auth state: UNCHALLENGED
2013/01/11 10:12:07:311 EST [DEBUG] DefaultHttpClient - Attempt 1 to execute request
2013/01/11 10:12:07:311 EST [DEBUG] DefaultClientConnection - Sending request: HEAD /ektorp-test/ HTTP/1.1
2013/01/11 10:12:07:311 EST [DEBUG] headers - >> HEAD /ektorp-test/ HTTP/1.1
2013/01/11 10:12:07:311 EST [DEBUG] headers - >> Host: dongshengcn.iriscouch.com:443
2013/01/11 10:12:07:311 EST [DEBUG] headers - >> Connection: Keep-Alive
2013/01/11 10:12:07:314 EST [DEBUG] DefaultHttpResponseParser - Garbage in response: Host not found
2013/01/11 10:12:07:314 EST [DEBUG] DefaultClientConnection - Connection 0.0.0.0:62168<->173.192.57.98:443 closed
2013/01/11 10:12:07:315 EST [DEBUG] DefaultClientConnection - Connection 0.0.0.0:62168<->173.192.57.98:443 shut down
2013/01/11 10:12:07:315 EST [DEBUG] BasicClientConnectionManager - Releasing connection org.apache.http.impl.conn.ManagedClientConnectionImpl@67c7980c
2013/01/11 10:12:07:315 EST [DEBUG] BasicClientConnectionManager - Connection can be kept alive for 9223372036854775807 MILLISECONDS
org.apache.http.client.ClientProtocolException
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:909)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)
    at HttpClientTest.test_dafault_http_client(HttpClientTest.java:69)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:53)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
    at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
    at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:175)
    at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:107)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:68)
Caused by: org.apache.http.ProtocolException: The server failed to respond with a valid HTTP response
    at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:103)
    at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:62)
    at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:254)
    at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:289)
    at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:252)
    at org.apache.http.impl.conn.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.java:191)
    at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:300)
    at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:127)
    at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:712)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:517)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
    ... 32 more
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.411 sec

import org.apache.http.HttpHost；
导入org.apache.http.client.methods.HttpHead；
导入org.apache.http.client.params.ClientPNames；
导入org.apache.http.impl.client.DefaultHttpClient；
导入org.apache.http.params.BasicHttpParams；
导入org.apache.http.params.HttpConnectionParams；
导入org.apache.http.params.HttpParams；
导入org.apache.http.params.HttpProtocolParams；
导入org.junit.Test；
导入java.io.IOException；
/**
*使用IntelliJ IDEA创建。
*用户：东胜
*日期：1/10/13
*时间:下午四时十分
*要更改此模板，请使用文件|设置|文件模板。
*/
公共类HttpClientTest{
专用int连接超时=1000；
私有int socketTimeout=10000；
私有字符串host=“dongshengcn.irisuchch.com”；
//私有字符串host=“dongshengcn.cloudant.com”；
专用int端口=443；
布尔useExpectContinue=true；
公共默认HttpClient配置客户端（）{
HttpParams params=新的BasicHttpParams（）；
HttpProtocolParams.setUseExpectContinue（参数，useExpectContinue）；
HttpConnectionParams
.setConnectionTimeout（参数，connectionTimeout）；
HttpConnectionParams.setSoTimeout（参数，socketTimeout）；
HttpConnectionParams.setTcpNoDelay（参数，布尔值.TRUE）；
字符串协议=“https”；
params.setParameter（ClientPNames.DEFAULT_主机，新的HttpHost（主机，
端口、协议）；
DefaultHttpClient客户端=新的DefaultHttpClient（参数）；
返回客户；
}
@试验
public void test_dafault_http_client（）引发IOException{
字符串uri=“/ektorp test/”；
DefaultHttpClient=configureClient（）；
org.apache.http.HttpResponse rsp=client.execute（新的HttpHead（uri））；
System.out.println（rsp.toString（））；
试一试{
org.apache.http.HttpResponse rsp2=client.execute（新的HttpHead（uri））；
System.out.println（rsp.toString（））；
}捕获（例外e）{
e、 printStackTrace（）；
}
}
}
运行HttpClientTest
2013/01/11 10:12:05:288 EST[DEBUG]基本客户端连接管理器-获取路由{s}的连接->https://dongshengcn.iriscouch.com:443
2013/01/11 10:12:06:065 EST[DEBUG]DefaultClientConnectionOperator-连接到东升CN.iriscoch.com:443
2013/01/11 10:12:07:201东部标准时间[调试]请求添加Cookies-CookieSpec选定：最佳匹配
2013/01/11 10:12:07:223 EST[DEBUG]RequestAuthCache-未在上下文中设置验证缓存
2013/01/11 10:12:07:223 EST[DEBUG]RequestTargetAuthentication-目标身份验证状态：未被质询
2013/01/11 10:12:07:224 EST[DEBUG]RequestProxyAuthentication-代理身份验证状态：未被质询
2013/01/11 10:12:07:224 EST[DEBUG]DefaultHttpClient-尝试1执行请求
2013/01/11 10:12:07:224 EST[DEBUG]DefaultClientConnection-发送请求：HEAD/ektorp test/HTTP/1.1
2013/01/11 10:12:07:226 EST[DEBUG]头->>HEAD/ektorp test/HTTP/1.1
2013/01/11 10:12:07:226 EST[调试]头->>主机：东升网.虹膜科技网：443
2013/01/11 10:12:07:226 EST[调试]头->>连接：保持活动状态
2013/01/11 10:12:07:303 EST[DEBUG]DefaultClientConnection-接收响应：未找到HTTP/1.1 404主机
2013/01/11 10:12:07:304 EST[DEBUG]头->头/ektorp测试/HTTP/1.1
2013/01/11 10:12:07:311 EST[调试]头->>主机：东升网.虹膜科技网：443
2013/01/11 10:12:07:311 EST[调试]头->>连接：保持活动状态
2013/01/11 10:12:07:314 EST[DEBUG]DefaultHttpResponseParser-响应中的垃圾：找不到主机
2013/01/11 10:12:07:314 EST[DEBUG]DefaultClientConnection-连接0.0.0:62168173.192.57.98:443已关闭
2013/01/11 10:12:07:315 EST[DEBUG]DefaultClientConnection-连接0.0.0:62168173.192.57.98:443关闭
2013/01/11 10:12:07:315 EST[DEBUG]基本客户端连接管理器-发布连接org.apache.http.impl.conn。ManagedClientConnectionImpl@67c7980c
2013/01/11 10:12:07:315 EST[调试]基本客户端连接管理器-连接可以保持活动状态9223372036854775807毫秒
org.apache.http.client.ClientProtocolException
位于org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:909）
位于org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:805）
位于org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:784）
在HttpClientTest.test_dafault_http_客户端（HttpClientTest.java:69）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）中
位于java.lang.reflect.Method.invoke（Method.java:597）
位于org.junit.runners.model.FrameworkMethod$1.runReflectVeCall（FrameworkMethod.java:45）
位于org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:15）
位于org.junit.runners.model.FrameworkMethod.invokeeexplosive（FrameworkMethod.java:42）
位于org.junit.internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:20）
位于org.junit.runners.ParentRunner.runLeaf（ParentRunner.java:263）
位于org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:68）
位于org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:47）
位于org.junit.runners.ParentRunner$3.run（ParentRunner.java:231）
位于org.junit.runners.ParentRunner$1.schedule（ParentRunner.java:60）
在组织