执行器服务停止线程正在等待IO

Question

我正在使用Apache公共库从Web下载页面这是程序的简化版

 public static void main(String[] args) throws InterruptedException {
        ExecutorService executorService = Executors.newSingleThreadExecutor(r -> new Thread(r,"second"));
        final ExecutorService service = Executors.newFixedThreadPool(2, r -> new Thread(r,"first"));
        final Future<Object> submit = executorService.submit(() -> {
            final Future<Object> create = service.submit(() -> {
                System.out.println("Start");
                org.apache.commons.io.IOUtils.copy(new URL("ny_url").openStream(), new FileWriter(new File("create")));
                System.out.println("End");
                return null;
            });
            try {
                return create.get();
            } catch (InterruptedException exc) {
                System.out.println("Interrupted");
                create.cancel(true);
                return null;
            }
        });
        try {
            submit.get(3000, TimeUnit.MILLISECONDS);
        } catch (ExecutionException e) {
            throw new RuntimeException(e);
        } catch (TimeoutException e) {
            System.out.println("Timeout");
            submit.cancel(true);
            System.out.println("HERE2");
        }
        executorService.shutdown();
        service.shutdownNow();
    }

您可以看到我有两个执行程序，第一个执行程序下载网页，第二个正在等待完成三秒钟，如果作业在3秒内无法下载页面，则主线程发送了Interrupt，我的第二个执行程序捕获了此异常并调用future.cancel(true);最后我关闭了两个执行器，但是，第一个执行器仍在工作，这是它的线程转储]

first" #11 prio=5 os_prio=0 tid=0x00007f18b0002000 nid=0x527d runnable [0x00007f18de08a000]
   java.lang.Thread.State: RUNNABLE
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
    at java.net.SocketInputStream.read(SocketInputStream.java:171)
    at java.net.SocketInputStream.read(SocketInputStream.java:141)
    at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
    at sun.security.ssl.InputRecord.read(InputRecord.java:503)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:975)
    - locked <0x00000000d9004a60> (a java.lang.Object)
    at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:933)
    at sun.security.ssl.AppInputStream.read(AppInputStream.java:105)
    - locked <0x00000000d9004b20> (a sun.security.ssl.AppInputStream)
    at java.io.BufferedInputStream.read1(BufferedInputStream.java:284)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
    - locked <0x00000000d9006b60> (a java.io.BufferedInputStream)
    at sun.net.www.MeteredStream.read(MeteredStream.java:134)
    - locked <0x00000000d9006b88> (a sun.net.www.http.KeepAliveStream)
    at java.io.FilterInputStream.read(FilterInputStream.java:133)
    at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:3444)
    at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
    at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
    at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
    - locked <0x00000000d902a040> (a java.io.InputStreamReader)
    at java.io.InputStreamReader.read(InputStreamReader.java:184)
    at java.io.Reader.read(Reader.java:140)
    at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:2001)
    at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1980)
    at org.apache.commons.io.IOUtils.copy(IOUtils.java:1957)
    at org.apache.commons.io.IOUtils.copy(IOUtils.java:1907)
    at org.apache.commons.io.IOUtils.copy(IOUtils.java:1886)
    at com.devadmin.nma.downloader.TestExecutor.lambda$null$2(TestExecutor.java:17)

因此，我假设第一位执行者的工作对中断一无所知，因为它正在等待IO，问题是，Apache commons在复制流时不检查Thread.isInterrupted，是否可以在不更改线程的情况下停止该线程？图书馆，谢谢

我正在使用Apache公共库从Web下载页面，这里是程序的简化版本public static void main（String [] args）引发InterruptedException {ExecutorService ...

Answer 1

我阅读了此博客https://techblog.bozho.net/interrupting-executor-tasks/这给了我一个想法这是我的程序现在的外观