我的代码作为独立的应用程序运行良好，但在JSP中永远运行。为什么？

Question

我需要从jsp页面调用服务器上的外部.jar文件。我首先尝试运行一个简单的java程序来调用jar文件。它在一秒钟内工作。我的代码是：

import java.io.IOException;

public class callJar_2 {

    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        String jarPath = "C:\\Oyster3.4\\Oyster_v.3.4.13.jar";
        String scriptPath = "C:\\Oyster3.4\\IdentityResolutionRunScript.xml";
        String args1[] = {"java", "-jar", jarPath, "-r", scriptPath};
        ProcessBuilder pb = new ProcessBuilder(args1);
        Process p = pb.start();
    }
}

然后我尝试在JSP中实现相同的功能。我的代码是：

<%
    String s = null;
    String jarPath = "C:\\Oyster3.4\\Oyster_v.3.4.13.jar";
    String scriptPath = "C:\\Oyster3.4\\IdentityResolutionRunScript.xml";
    String args[] = {"java", "-jar", jarPath, "-r", scriptPath};
    ProcessBuilder pb = new ProcessBuilder(args);

    final Process p = pb.start();

    BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));

    BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));

    // read the output from the command
    System.out.println("Here is the standard output of the command:\n");
    while ((s = stdInput.readLine()) != null) {
        System.out.println(s);
    } 

%>

跑步永远不会完成，需要数小时。请帮忙！我怎样才能加快速度？ 我也使用runTime.exec()，但这非常慢。