当我点击表单的提交按钮时，我会收到Exception . 在google上搜索更多内容后，看起来当服务器没有响应HTMLUnit提交的请求时会抛出此异常 . 我正在使用HTMLUnit 2.9 .
java.lang.RuntimeException：org.apache.http.NoHttpResponseException：目标服务器无法响应com.gargoylesoftware.htmlunit.WebClient.download（WebClient.java:2131）com.gargoylesoftware.htmlunit.html.HtmlForm.submit（ HtmlForm.java:135）com.gargoylesoftware.htmlunit.html.HtmlSubmitInput.doClickAction（HtmlSubmitInput.java:75）at com.gargoylesoftware.htmlunit.html.HtmlElement.click（HtmlElement.java:1244）at com.gargoylesoftware.htmlunit .html.HtmlElement.click（HtmlElement.java:1195）在com.gargoylesoftware.htmlunit.html.HtmlElement.click（HtmlElement.java:1158）在com.quinstreet.dms.qaautomationtool.testengine.LeadSubmitter.submitForm（LeadSubmitter.java ：1518）在com.quinstreet.dms.qaautomationtool.testengine.LeadSubmitter.processFodPage（LeadSubmitter.java:627）在com.quinstreet.dms.qaautomationtool.testengine.LeadSubmitter.submitLead（LeadSubmitter.java:431）在com.quinstreet . com.quinstreet.dms.qaa上的dms.qaautomationtool.testengine.LeadSubmitter.run（LeadSubmitter.java:174） utomationtool.util.ThreadPool $ PooledThread.run（ThreadPool.java:123）
引起：org.apache.http.NoHttpResponseException：目标服务器无法在org.apache.http.impl.io.AbstractMessageParser上的org.apache.http.impl.conn.DefaultResponseParser.parseHead（DefaultResponseParser.java:101）回复.parse（AbstractMessageParser.java:252）在org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader（AbstractHttpClientConnection.java:281）在org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader（DefaultClientConnection.java:247）在org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader（AbstractClientConnAdapter.java:219）位于org.apache.http.protocol.HttpRequestExecutor的org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse（HttpRequestExecutor.java:298） . 执行（HttpRequestExecutor.java:125）在org.apache.http.impl.client.DefaultRequestDirector.tryExecute（DefaultRequestDirector.java:645）在org.apache.http.impl.client.DefaultRequestDirector.execute（DefaultRequestDirector.java:464）在org.apache.http.im pl.client.AbstractHttpClient.execute（AbstractHttpClient.java:820）在org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:776）在com.gargoylesoftware.htmlunit.HttpWebConnection.getResponse（HttpWebConnection.java： 152）在com.gargoylesoftware.htmlunit.WebClient.loadWebResponseFromWebConnection（WebClient.java:1439）在com.gargoylesoftware.htmlunit.WebClient.loadWebResponse（WebClient.java:1358）在com.gargoylesoftware.htmlunit.WebClient.download（WebClient.java ：2127）
请提出解决方案或任何类型的线索来解决此问题 .