Question

我的应用程序中有一个TCP套接字。此时它唯一的功能是周期性地发送数据包以保持与服务器的连接。连接成功后，我的循环是：

while (running) {
    outputStream.write(0x00);
    outputStream.flush();
    Thread.sleep(5000 + random.nextInt(5000));
}

但是，有时并且显然是随机的，write方法会引发以下异常：

java.net.SocketException: sendto failed: EBADF (Bad file descriptor)
    at libcore.io.IoBridge.maybeThrowAfterSendto(IoBridge.java:542)
    at libcore.io.IoBridge.sendto(IoBridge.java:511)
    at java.net.PlainSocketImpl.write(PlainSocketImpl.java:500)
    at java.net.PlainSocketImpl.-wrap1(PlainSocketImpl.java)
    at java.net.PlainSocketImpl$PlainSocketOutputStream.write(PlainSocketImpl.java:266)
    at java.io.OutputStream.write(OutputStream.java:82)
    at libcore.io.Streams.writeSingleByte(Streams.java:53)
    at java.net.PlainSocketImpl$PlainSocketOutputStream.write(PlainSocketImpl.java:262)
    at myapp.Service$TCPClient.run(Service.java:174)
    at java.lang.Thread.run(Thread.java:818)
Caused by: android.system.ErrnoException: sendto failed: EBADF (Bad file descriptor)
    at libcore.io.Posix.sendtoBytes(Native Method)
    at libcore.io.Posix.sendto(Posix.java:211)
    at libcore.io.BlockGuardOs.sendto(BlockGuardOs.java:278)
    at libcore.io.IoBridge.sendto(IoBridge.java:509)
... 8 more

我无法复制错误，有时会发生错误。在下一次迭代中，数据包成功发送，并由服务器接收。始终建立连接。

可能导致此问题以及如何解决问题？

TCP套接字随机抛出SocketException：sendto失败：EBADF（错误的文件描述符）

0 个答案: