例外情况如下：

java.io.IOException: Filesystem closed
        at org.apache.hadoop.hdfs.DFSClient.checkOpen(DFSClient.java:815)
        at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:868)
        at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:934)
        at java.io.DataInputStream.read(DataInputStream.java:100)
        at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:91)
        at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:59)
        at com.tencent.oceanus.utils.HdfsFileSystem.getFileV2(HdfsFileSystem.java:94)
        at com.tencent.oceanus.utils.Utils.setLocalFilePath(Utils.java:2910)
        at com.tencent.oceanus.server.jobs.JobManager.compile(JobManager.java:231)
        at com.tencent.oceanus.server.jobs.transitions.StartTransitionCallback$StartThread.start(StartTransitionCallback.java:236)
        at com.tencent.oceanus.server.jobs.transitions.StartTransitionCallback$StartThread.run(StartTransitionCallback.java:142)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

这是我的密码。我应该如何修改我的代码？
文件存储在hdfs上，我应该使用hadoop的api吗？或者如何让错误报告更清楚？
我测试了“so”文件，它可以被读取。这个so文件需要被读取，因为使用了jni。
我试过很多次了，请帮帮我。

package com.tencent.wxapp.core.jni;

import java.io.*;
import java.util.List;

public class JNI{
    public native byte[] call(List<String> jList);
    static{

        InputStream is = JNI.class.getResourceAsStream("/JNIdll.so");

        File file = null;

        try {
            file = File.createTempFile("lib", ".so");
        } catch (IOException e) {
            e.printStackTrace();
        }
        OutputStream os = null;
        try {
            os = new FileOutputStream(file);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        byte[] buffer = new byte[1024];
        int length = 0;
        while (true) {
            try {
                if (!((length = is.read(buffer)) != -1)) break;
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                os.write(buffer, 0, length);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        try {
            is.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {
            os.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        System.load(file.getAbsolutePath());
        file.deleteOnExit();

    }
}