java - 试图将 Tomcat servlet 的 http 请求发送到另一台服务器，卡在 HttpClientBuilder.create().build();

Question

我尝试从 servlet 中的静态函数向远程服务器发送请求，我使用 org.apache.http.client.HttpClient;

但是当我调试时，它总是停留在创建 HttpClient 上。

我尝试从常规 JAVA 项目运行此代码，它按预期运行和执行，但是当我尝试从 Tomacat 8 调用此方法时，它就是不起作用。

这是假设将图像发送到远程服务器的整个 JAVA 类，我从常规 MAVEN java 项目运行此方法并且它有效但在 tomcat 中我遇到了问题。

此方法locateFileAndUpload 只是将本地文件路径传递给以下方法之一(uploadImageToRemoteServer 或anotherUpload)。此方法从 servlet 内部调用。

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

public class Util {
    public static String UPLOAD_SERVER_LOC = "http://localhost/photopostimg/upload.php";


    /**
     * Get the file name and begin the upload process of the thumbnail and the processed file
     * @param str 
     */
    public static void locateFileAndUpload(String str){
        System.out.println(str);
        try {
            uploadImageToRemoteServer(str);
            //anotherUpload(str);
        } catch (IOException ex) {
            Logger.getLogger(Util.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public static void anotherUpload(String fileLocation) throws IOException {

        String postReceiverUrl = UPLOAD_SERVER_LOC;

        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost uploadFile = new HttpPost(postReceiverUrl);
        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        //builder.addTextBody("field1", "yes", ContentType.TEXT_PLAIN);

        // This attaches the file to the POST:
        File f = new File(fileLocation);
        builder.addBinaryBody(
            "fileToUpload",
            new FileInputStream(f),
            ContentType.APPLICATION_OCTET_STREAM,
            f.getName()
        );

        HttpEntity multipart = builder.build();
        uploadFile.setEntity(multipart);
        CloseableHttpResponse response = httpClient.execute(uploadFile);
        HttpEntity resEntity = response.getEntity();

        if (resEntity != null) {
            String responseStr = EntityUtils.toString(resEntity).trim();
            // you can add an if statement here and do other actions based on the response
            System.out.println(responseStr);
            System.out.println(response.getStatusLine());
        }
    }    


    /**
     * Gets Local File location on Tomcat and uploads it to UPLOAD_SERVER_LOC
     * 
     * @param fileLocation
     * @return
     * @throws IOException 
     */
    public static int uploadImageToRemoteServer(String fileLocation) throws IOException {

        // the URL where the file will be posted
        String postReceiverUrl = UPLOAD_SERVER_LOC;

        // new HttpClient
        //HttpClient httpClient = new DefaultHttpClient();
        HttpClient httpClient = HttpClients.createDefault();
        //HttpClient httpClient = HttpClientBuilder.create().build();

        // post header
        HttpPost httpPost = new HttpPost(postReceiverUrl);

        //Create File
        File file = new File(fileLocation);
        FileBody fileBody = new FileBody(file);

        //Set up HTTP post
        //MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
        MultipartEntityBuilder reqEntity = MultipartEntityBuilder.create();   
        reqEntity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);

        reqEntity.addPart("fileToUpload", fileBody);

        httpPost.setEntity(reqEntity.build());

        // execute HTTP post request
        HttpResponse response = httpClient.execute(httpPost);
        HttpEntity resEntity = response.getEntity();

        if (resEntity != null) {
            String responseStr = EntityUtils.toString(resEntity).trim();
            // you can add an if statement here and do other actions based on the response
            System.out.println(responseStr);
            System.out.println(response.getStatusLine());
        }
        return 0;

    }

}

upload.php

<?php
$maxsize = 20e+6; //set the max upload size in bytes

$error='';
//this will cause the rest of the processing to be skipped
//and the upload form displays
    if (!is_uploaded_file($_FILES['fileToUpload']["tmp_name"]) AND
            !isset($error)) {
        $error = "<b>You must upload a file!</b><br /><br />";
        unlink($_FILES['fileToUpload']['tmp_name']);
    }else if ($_FILES['fileToUpload']['size'] > $maxsize AND ($error=='')) {
        $error = "<b>Error, file must be less than $maxsize bytes.</b><br /><br />";
        unlink($_FILES['fileToUpload']['tmp_name']);
    }else if ($_FILES['fileToUpload']['type'] != "image/gif" AND
            $_FILES["fileToUpload"]["type"] != "image/pjpeg" AND
            $_FILES["fileToUpload"]["type"] != "image/jpeg" AND !isset($error)) {
        $error = "<b>You may only upload .gif .png or .jpeg files .</b><br /><br />";
        unlink($_FILES['fileToUpload']['tmp_name']);
    }

    if ($error=='') {
        $filename =$_FILES['fileToUpload']['name'];
        //Upload file
        move_uploaded_file($_FILES['fileToUpload']['tmp_name'], "img/" . $filename);

        print "<br>Thank you for your upload.";
        //Refresh the page
        exit;
    } else {
        echo ("$error");
    }
?>

此方法获取 Tomcat 服务器上本地文件的路径，并假设将其发送到 UPLOAD_SERVER_LOC 变量中的 URL。

---

这是卡住的地方:

---

这是日志:

14-Jan-2017 09:25:19.894 SEVERE [http-nio-8084-exec-3] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [PhotoPost] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@45da3370]) and a value of type [org.glassfish.jersey.internal.Errors] (value [org.glassfish.jersey.internal.Errors@7371b780]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
14-Jan-2017 09:25:19.901 SEVERE [http-nio-8084-exec-3] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [PhotoPost] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@22c18b15]) and a value of type [org.glassfish.jersey.process.internal.RequestScope.Instance] (value [Instance{id=289ec83e-c608-4d92-bfb1-63b75b6eb9e9, referenceCounter=2, store size=12}]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
14-Jan-2017 09:25:20.430 INFO [http-nio-8084-exec-3] org.apache.catalina.startup.HostConfig.undeploy Undeploying context [/PhotoPost]
14-Jan-2017 09:25:20.450 INFO [http-nio-8084-exec-6] org.apache.catalina.startup.HostConfig.deployDescriptor Deploying configuration descriptor /Users/pini/Library/Application Support/NetBeans/8.2/apache-tomcat-8.0.27.0_base/conf/Catalina/localhost/PhotoPost.xml
14-Jan-2017 09:25:23.409 INFO [http-nio-8084-exec-6] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
14-Jan-2017 09:25:23.489 INFO [http-nio-8084-exec-6] org.glassfish.jersey.servlet.init.JerseyServletContainerInitializer.addServletWithApplication Registering the Jersey servlet application, named api.ApplicationConfig, at the servlet mapping /api/*, with the Application class of the same name.
14-Jan-2017 09:25:24.125 INFO [http-nio-8084-exec-6] org.glassfish.jersey.server.ApplicationHandler.initialize Initiating Jersey application, version Jersey: 2.5.1 2014-01-02 13:43:00...
14-Jan-2017 09:25:24.925 INFO [http-nio-8084-exec-6] org.apache.catalina.startup.HostConfig.deployDescriptor Deployment of configuration descriptor /Users/pini/Library/Application Support/NetBeans/8.2/apache-tomcat-8.0.27.0_base/conf/Catalina/localhost/PhotoPost.xml has finished in 4,474 ms
14-Jan-2017 09:25:24.936 INFO [http-nio-8084-exec-10] org.apache.catalina.util.LifecycleBase.start The start() method was called on component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/PhotoPost]] after start() had already been called. The second call will be ignored.
14-Jan-2017 09:25:28.669 INFO [http-nio-8084-exec-9] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load [org.apache.http.impl.client.HttpClientBuilder]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
 java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [org.apache.http.impl.client.HttpClientBuilder]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1355)
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1341)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1206)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:344)
    at Utility.Util.uploadImageToRemoteServer(Util.java:87)
    at Utility.Util.locateFileAndUpload(Util.java:33)
    at api.PostResource.insertPost(PostResource.java:150)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:151)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:171)
    at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:152)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:104)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:402)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:349)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:106)
    at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:259)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:318)
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:236)
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1010)
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:373)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:382)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:345)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:220)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

14-Jan-2017 09:25:54.047 INFO [http-nio-8084-exec-9] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load [org.apache.http.impl.client.HttpClientBuilder]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
 java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [org.apache.http.impl.client.HttpClientBuilder]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1355)
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1341)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1206)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
    at Utility.Util.uploadImageToRemoteServer(Util.java:87)
    at Utility.Util.locateFileAndUpload(Util.java:33)
    at api.PostResource.insertPost(PostResource.java:150)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:151)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:171)
    at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:152)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:104)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:402)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:349)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:106)
    at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:259)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:318)
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:236)
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1010)
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:373)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:382)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:345)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:220)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

14-Jan-2017 09:25:57.244 INFO [http-nio-8084-exec-9] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load [org.glassfish.jersey.server.monitoring.RequestEvent$ExceptionCause]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
 java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [org.glassfish.jersey.server.monitoring.RequestEvent$ExceptionCause]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1355)
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1341)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1206)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
    at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:406)
    at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:265)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:318)
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:236)
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1010)
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:373)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:382)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:345)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:220)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

我已经按照要求更新了这个问题!

Answer 1

我在使用 apache HttpClient、tomcat jersey servlet 内部的 HttpClients 时遇到了问题。我不能完全发布这个问题，但它与 ThreadPool 和线程窃取有关，因为我在 TaskExecutor 上运行了这个任务，当像这样执行它时，HttpClient 似乎被阻止了。

我最终使用了这里的 MultipartUtility 类: http://www.codejava.net/java-se/networking/upload-files-by-sending-multipart-request-programmatically

它解决了我的问题。我必须指出，使用 org.apache.http.client.HttpClient 在常规 JAVA 和 MAVEN 项目上对我有用，而且使用起来非常简单。

我花了几个小时才找到一个替代方案，但如果有人可以让它与 apache 的 HttpClient 一起工作并解释确切的问题是什么，那将非常有帮助。