java.io.IOException : Invalid argument and Too many open files

Question

我使用下载种子的库。但今天发生了一些错误(日志):

Could not create temp files
java.io.IOException: Invalid argument
    at java.io.RandomAccessFile.setLength(Native Method)
    at jBittorrentAPI.DownloadManager.checkTempFiles(DownloadManager.java:261)
    at jBittorrentAPI.DownloadManager.(DownloadManager.java:108)
    at torrentstealer.DownloadTorrent.run(DownloadTorrent.java:65)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Could not create temp files
java.io.IOException: Invalid argument
    at java.io.RandomAccessFile.setLength(Native Method)
    at jBittorrentAPI.DownloadManager.checkTempFiles(DownloadManager.java:261)
    at jBittorrentAPI.DownloadManager.(DownloadManager.java:108)
    at torrentstealer.DownloadTorrent.run(DownloadTorrent.java:65)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Could not create temp files
java.io.IOException: Invalid argument
    at java.io.RandomAccessFile.setLength(Native Method)
    at jBittorrentAPI.DownloadManager.checkTempFiles(DownloadManager.java:261)
    at jBittorrentAPI.DownloadManager.(DownloadManager.java:108)
    at torrentstealer.DownloadTorrent.run(DownloadTorrent.java:65)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Could not create temp files
java.io.IOException: Invalid argument
    at java.io.RandomAccessFile.setLength(Native Method)
    at jBittorrentAPI.DownloadManager.checkTempFiles(DownloadManager.java:261)
    at jBittorrentAPI.DownloadManager.(DownloadManager.java:108)
    at torrentstealer.DownloadTorrent.run(DownloadTorrent.java:65)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Could not create temp files
java.io.FileNotFoundException: /root/TorrentStealer/downloads/MAME - Update ROMs (v0.141 to v0.141u2)/lah_l104.zip (Too many open files)
    at java.io.RandomAccessFile.open(Native Method)
    at java.io.RandomAccessFile.(RandomAccessFile.java:212)
    at jBittorrentAPI.DownloadManager.checkTempFiles(DownloadManager.java:260)
    at jBittorrentAPI.DownloadManager.(DownloadManager.java:108)
    at torrentstealer.DownloadTorrent.run(DownloadTorrent.java:65)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Could not create temp files
java.io.FileNotFoundException: /root/TorrentStealer/downloads/Degrassi.Junior.High.S01-S03.INTERNAL.DVDRip.XviD-FFNDVD/Degrassi.Junior.High.S01.INTERNAL.DVDRip.XviD-FFNDVDDegrassi.Junior.High.S01E10.INTERNAL.DVDRip.XviD-FFNDVDdegrassi.junior.high.s01e10.internal.dvdrip.xvid-ffndvd.r10 (Too many open files)
    at java.io.RandomAccessFile.open(Native Method)
    at java.io.RandomAccessFile.(RandomAccessFile.java:212)
    at jBittorrentAPI.DownloadManager.checkTempFiles(DownloadManager.java:260)
    at jBittorrentAPI.DownloadManager.(DownloadManager.java:108)
    at torrentstealer.DownloadTorrent.run(DownloadTorrent.java:65)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Could not create temp files
java.io.FileNotFoundException: /root/TorrentStealer/downloads/MAME - Update ROMs (v0.141 to v0.141u2)/lah_l108.zip (Too many open files)
    at java.io.RandomAccessFile.open(Native Method)
    at java.io.RandomAccessFile.(RandomAccessFile.java:212)
    at jBittorrentAPI.DownloadManager.checkTempFiles(DownloadManager.java:260)
    at jBittorrentAPI.DownloadManager.(DownloadManager.java:108)
    at torrentstealer.DownloadTorrent.run(DownloadTorrent.java:65)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)

依此类推，日志继续。我发现这个文件存在，这是发生错误的代码的一部分:

    /**
     * Check the existence of the files specified in the torrent and if necessary,
     * create them
     *
     * @return int
     * @todo Should return an integer representing some error message...
     */
    public synchronized int checkTempFiles() {
        String saveas = Constants.SAVEPATH; // Should be configurable
        if (this.nbOfFiles > 1)
            saveas += this.torrent.saveAs + "/";
        else
        {
            this.torrent.saveAs = this.torrent.name.get(0).toString();
        }
        new File(saveas).mkdirs();
        for (int i = 0; i < this.nbOfFiles; i++) {
            File temp = new File(saveas + ((String) (this.torrent.name.get(i))));
            try {
                this.output_files[i] = new RandomAccessFile(temp, "rw");
                this.output_files[i].setLength((Integer)this.torrent.length.get(
                        i));
            } catch (IOException ioe) {
                System.err.println("Could not create temp files");
                ioe.printStackTrace();
            }
        }
        return 0;
    }

这里调用的是:

        // запуск закачки
        dm.startListening(49152, 65535);
        dm.startTrackerUpdate();<p></p>

<pre><code>    while(true)
    {
        if(dm.isComplete())
        {
            break;
        }

        try
        {
            Thread.sleep(100);
        }
        catch(InterruptedException ex)
        {
            Logger.getLogger(DownloadTorrent.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    dm.stopTrackerUpdate();
    dm.closeTempFiles();</code></pre>
</code></pre>

<p>And upper code called here:

        ex = Executors.newFixedThreadPool(3);</p>

    for(String torrentFile : torrentFiles)
    {
        ex.submit(new DownloadTorrent("/root/TorrentStealer/torrents/" + torrentFile));
    }

    // ожидание завершения потоков загрузки файлов торрентов
    ex.shutdown();

    try
    {
        ex.awaitTermination(30, TimeUnit.MINUTES);
    }
    catch(InterruptedException ex1)
    {
        Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex1);
    }

    ex.shutdownNow();</code></pre>

以下是修复“打开文件过多”的说明: http://wiki.magnolia-cms.com/display/WIKI/Too+Many+Open+Files

我设置了999999个最大文件，修复了一段时间的错误，然后设置了9999999进行测试，并没有真正起作用，总是发生错误。服务器重启后运行后一瞬间不可能有9999999个打开的文件!

所以我不知道该怎么办。你能帮我吗？

以下是发生异常时打开文件的计数:T217:~# lsof |厕所-l结果是:2708

Answer 1

堆栈跟踪在 java.io.RandomAccessFile.setLength() 处指示错误，该错误接受 long数据类型。在您的代码中，您转换 this.torrent.length.get(i) 的结果为整数。

什么does this.torrent.length.get(i)返回？

当您将返回的数据转换为整数时，可能会出现一些缩小尺寸的问题，可能会返回负数，从而导致 RandomAccessFile.setLength()错误输出。