JavaのXML DocumentBuilderは解析時間切れで失敗しますか？

Question

私は典型的な使用例だと思います。私はApache HttpClientを使用してリモート（内部）サーバーへのPOSTを行っています。サーバーからの応答はXMLです。

エンティティからの応答をストリームとして取得し、XMLドキュメントに直接解析します。このコードスニペットは私が何をしているかを示しています。

HttpResponse response = httpClient.execute(request); 
int code = response.getStatusLine().getStatusCode(); 
if(code != 200) { 
    returnValue.addParameter("msg", "Recieved invalid status code '" + code + "'"); 
} 
else { 
    HttpEntity entity = response.getEntity(); 

    if (entity != null) { 
     InputStream iStream = entity.getContent(); 
     try { 
      DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder(); 
      Document doc = db.parse(iStream); 

これを私の開発ボックスで実行しても問題ありません。しかし、内部サーバーの1つに展開すると、スニペットdb.parse(iStream)の最後の行で接続タイムアウト例外が発生します。

なぜですか？

私の理解（とフィドラー）は、私がコンテンツのエンティティに尋ねる頃に要求が完了したと言います。したがって、入力ストリームはネットワーク上に引き出されていないので、かなり速くなければなりません！

誰でも何が起こっている可能性がありますか？事前

アップデートで

多くのおかげで、ここで私は

java.net.ConnectException: Connection timed out: connect 
    at java.net.DualStackPlainSocketImpl.connect0(Native Method) ~[?:1.7.0_80] 
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79) ~[?:1.7.0_80] 
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339) ~[?:1.7.0_80] 
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200) ~[?:1.7.0_80] 
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182) ~[?:1.7.0_80] 
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) ~[?:1.7.0_80] 
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[?:1.7.0_80] 
    at java.net.Socket.connect(Socket.java:579) ~[?:1.7.0_80] 
    at java.net.Socket.connect(Socket.java:528) ~[?:1.7.0_80] 
    at sun.net.NetworkClient.doConnect(NetworkClient.java:180) ~[?:1.7.0_80] 
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:432) ~[?:1.7.0_80] 
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:527) ~[?:1.7.0_80] 
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:211) ~[?:1.7.0_80] 
    at sun.net.www.http.HttpClient.New(HttpClient.java:308) ~[?:1.7.0_80] 
    at sun.net.www.http.HttpClient.New(HttpClient.java:326) ~[?:1.7.0_80] 
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:997) ~[?:1.7.0_80] 
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:933) ~[?:1.7.0_80] 
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:851) ~[?:1.7.0_80] 
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1301) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:643) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(XMLEntityManager.java:1297) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(XMLEntityManager.java:1264) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(XMLDTDScannerImpl.java:263) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(XMLDocumentScannerImpl.java:1164) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(XMLDocumentScannerImpl.java:1050) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:964) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243) ~[?:1.7.0_80] 
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:347) ~[?:1.7.0_80] 
    at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:121) ~[?:1.7.0_80] 
    at com.XXXXXX.YYYYY.harness.server.Api.postCxml(Api.java:183) [classes/:?] 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_80] 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_80] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_80] 
    at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_80] 
    at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:160) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) [jersey-common-2.22.2.jar:?] 
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) [jersey-common-2.22.2.jar:?] 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315) [jersey-common-2.22.2.jar:?] 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297) [jersey-common-2.22.2.jar:?] 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:267) [jersey-common-2.22.2.jar:?] 
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) [jersey-common-2.22.2.jar:?] 
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154) [jersey-server-2.22.2.jar:?] 
    at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473) [jersey-container-servlet-core-2.22.2.jar:?] 
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427) [jersey-container-servlet-core-2.22.2.jar:?] 
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388) [jersey-container-servlet-core-2.22.2.jar:?] 
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341) [jersey-container-servlet-core-2.22.2.jar:?] 
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228) [jersey-container-servlet-core-2.22.2.jar:?] 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) [catalina.jar:8.0.30] 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:8.0.30] 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-websocket.jar:8.0.30] 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [catalina.jar:8.0.30] 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:8.0.30] 
    at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71) [log4j-web-2.5.jar:2.5] 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [catalina.jar:8.0.30] 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:8.0.30] 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) [catalina.jar:8.0.30] 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [catalina.jar:8.0.30] 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [catalina.jar:8.0.30] 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) [catalina.jar:8.0.30] 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [catalina.jar:8.0.30] 
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) [catalina.jar:8.0.30] 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [catalina.jar:8.0.30] 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:521) [catalina.jar:8.0.30] 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096) [tomcat-coyote.jar:8.0.30] 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674) [tomcat-coyote.jar:8.0.30] 
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2500) [tomcat-coyote.jar:8.0.30] 
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2489) [tomcat-coyote.jar:8.0.30] 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [?:1.7.0_80] 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [?:1.7.0_80] 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:8.0.30] 
    at java.lang.Thread.run(Thread.java:745) [?:1.7.0_80] 

Answer 1

を取得するスタックトレースがあり、あなたは正確にエラーメッセージを投稿することができますし、外観を持つように応答の内容を投稿することができますそれには何がありますか？

私にとっては、これはネットワーク/セキュリティ設定の問題のようです。

おそらくDocumentBuilderはXMLドキュメントのネットワークソケット経由でDTDにアクセスしようとしていますか？ XML文書にDTD参照がある場合は、それらを編集して原因を証明してください。

Answer 2

KilleKatは、DocumentBuilderが外部DTDを検証しようとしていたことが原因であると指摘していました。私はこの記事に

Make DocumentBuilder.parse ignore DTD references

を使用して

HttpResponse response = httpClient.execute(request); 
int code = response.getStatusLine().getStatusCode(); 
if(code != 200) { 
    returnValue.addParameter("msg", "Recieved invalid status code '" + code + "'"); 
} 
else { 
    HttpEntity entity = response.getEntity(); 

    if (entity != null) { 
     InputStream iStream = entity.getContent(); 
     try { 
      DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
      dbf.setValidating(false); 
      dbf.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false); 

      DocumentBuilder db = dbf.newDocumentBuilder(); 
      Document doc = db.parse(iStream);