我需要帮助！
我使用Java 8在Tomcat 8上运行CentOS 6上的应用程序。
我在Apache httpclient（版本4）中配置TLSv1.2如下：
HttpComponentsHttpInvokerRequestExecutor httpInvokerRequestExecutor = new HttpComponentsHttpInvokerRequestExecutor();
SSLContext sslcontext= SSLContexts.custom().loadTrustMaterial(null,
new TrustSelfSignedStrategy()).build();
// Allow TLSv1.2 protocol, use NoopHostnameVerifier to trust self-singed cert
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext,
new String[] { "TLSv1" , "TLSv1.1", "TLSv1.2" }, null, new NoopHostnameVerifier());
CloseableHttpClient httpClient = HttpClients.custom().
setSSLSocketFactory(sslsf).build();
httpInvokerRequestExecutor.setHttpClient(httpClient);
我使用上面的代码连接到可能配置了TLSv1或TLSv1.2的服务器。
不幸的是，当服务器配置了TLSv1.2时，我有时会遇到以下异常：Received fatal alert: protocol_version。
它的工作时间最但我希望它能够始终。
有什么问题？
我错过了什么配置？
是负载问题吗？
加
我们在测试期间发现，在异常的情况下，客户端开始与TLSv1协商而不使用TLSv1.2。
我们的配置有什么问题？
Caused by: javax.net.ssl.SSLException: Received fatal alert: protocol_version
at sun.security.ssl.Alerts.getSSLException(Alerts.java:208) ~[?:1.8.0_71]
at sun.security.ssl.Alerts.getSSLException(Alerts.java:154) ~[?:1.8.0_71]
at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:2023) ~[?:1.8.0_71]
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1125) ~[?:1.8.0_71]
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375) ~[?:1.8.0_71]
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403) ~[?:1.8.0_71]
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387) ~[?:1.8.0_71]
at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:394) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:353) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:134) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107) ~[httpclient-4.4.1.jar:4.4.1]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55) ~[httpclient-4.4.1.jar:4.4.1]
at org.springframework.remoting.httpinvoker.HttpComponentsHttpInvokerRequestExecutor.executeHttpPost(HttpComponentsHttpInvokerRequestExecutor.java:312) ~[spring-web-4.1.9.RELEASE.jar:4.1.9.RELEASE]
at org.springframework.remoting.httpinvoker.HttpComponentsHttpInvokerRequestExecutor.doExecuteRequest(HttpComponentsHttpInvokerRequestExecutor.java:230) ~[spring-web-4.1.9.RELEASE.jar:4.1.9.RELEASE]
at org.springframework.remoting.httpinvoker.AbstractHttpInvokerRequestExecutor.executeRequest(AbstractHttpInvokerRequestExecutor.java:138) ~[spring-web-4.1.9.RELEASE.jar:4.1.9.RELEASE]
at org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor.executeRequest(HttpInvokerClientInterceptor.java:194) ~[spring-web-4.1.9.RELEASE.jar:4.1.9.RELEASE]
at org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor.executeRequest(HttpInvokerClientInterceptor.java:176) ~[spring-web-4.1.9.RELEASE.jar:4.1.9.RELEASE]
at org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor.invoke(HttpInvokerClientInterceptor.java:144) ~[spring-web-4.1.9.RELEASE.jar:4.1.9.RELEASE]
... 27 more