Android : Socket - java.net.SocketException: sendto failed: EPIPE (Broken pipe)

问题

I am trying to make connection with server using socket. The connection pipe is broken as shown below exceptions.

01-31 14:47:16.536: W/System.err(27255): java.net.SocketException: sendto failed: EPIPE (Broken pipe)
01-31 14:47:16.550: W/System.err(27255):    at libcore.io.IoBridge.maybeThrowAfterSendto(IoBridge.java:496)
01-31 14:47:16.550: W/System.err(27255):    at libcore.io.IoBridge.sendto(IoBridge.java:465)
01-31 14:47:16.550: W/System.err(27255):    at java.net.PlainSocketImpl.write(PlainSocketImpl.java:507)
01-31 14:47:16.550: W/System.err(27255):    at java.net.PlainSocketImpl.access$100(PlainSocketImpl.java:46)
01-31 14:47:16.664: W/NetworkManagementSocketTagger(24437): setKernelCountSet(10021, 1) failed with errno -2
01-31 14:47:16.684: W/System.err(27255):    at java.net.PlainSocketImpl$PlainSocketOutputStream.write(PlainSocketImpl.java:269)
01-31 14:47:16.693: W/System.err(27255):    at java.io.DataOutputStream.write(DataOutputStream.java:98)
01-31 14:47:16.693: W/System.err(27255):    at java.io.OutputStream.write(OutputStream.java:82)
01-31 14:47:16.693: W/System.err(27255):    at com.x.x.y.sendRec(y.java:460)
01-31 14:47:16.693: W/System.err(27255):    at com.x.x.y.access$0(y.java:384)
01-31 14:47:16.693: W/System.err(27255):    at com.x.x.y$2.run(y.java:363)
01-31 14:47:16.693: W/System.err(27255):    at java.lang.Thread.run(Thread.java:856)
01-31 14:47:16.693: W/System.err(27255): Caused by: libcore.io.ErrnoException: sendto failed: EPIPE (Broken pipe)
01-31 14:47:16.693: W/System.err(27255):    at libcore.io.Posix.sendtoBytes(Native Method)
01-31 14:47:16.693: W/System.err(27255):    at libcore.io.Posix.sendto(Posix.java:146)
01-31 14:47:16.693: W/System.err(27255):    at libcore.io.BlockGuardOs.sendto(BlockGuardOs.java:177)
01-31 14:47:16.693: W/System.err(27255):    at libcore.io.IoBridge.sendto(IoBridge.java:463)

Here is the code and on this line outStreamRec.write(bData); throwing exception.

    try {
        port = 86;
        byterecv = new byte[1040];
        clientRec = new Socket();
        clientRec.connect(new InetSocketAddress("192.168.1.36", port));
        System.out.println("Just connected to " + clientRec.getRemoteSocketAddress());
    } catch (IOException e2) {
        // TODO Auto-generated catch block
        e2.printStackTrace();
    }
    while (true) {
        try {
            System.out.println("Connecting to " + ServerUrl.url + " on port " + port);              
            OutputStream outToServerRec = clientRec.getOutputStream();
            DataOutputStream outStreamRec = new DataOutputStream(outToServerRec);

            outStreamRec.write(bData);

            InputStream inFromServerPlay = clientRec.getInputStream();
            DataInputStream inStreamPlay = new DataInputStream(inFromServerPlay);
            while ((lstream = inStreamPlay.read(byterecv)) != -1) {
                System.out.println("startrec bytearray -- " + byterecv.length);
                bos1.write(byterecv, 0, lstream);
            }                
            if (stopcall == true) {
                clientRec.close();
                break;
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

Note: if I close the socket connection immediate works fine. But I want to keep the connection alive still I close the socket connection manually. Onclick of stop button I am closing the connection.

I searched the web, but didn't find a way to fix this.

回答1:

The peer closed the connection while you were writing to it. That usually means you sent it something it didn't understand. Is it perhaps an HTTP server? Or some other protocol that you haven't implemented in your client code?

回答2:

My two cents: we had the same issue (BROKEN EPIPE), and looking through Fiddler (or Charls, or WireShark, or other proxy debugger / listener / etc) we've noticed that no request gets sent out at all.

The reason was that we added "Content-Length" header with the wrong value.

回答3:

I met this kind issue on a Samsung Tablet(GT-P5113, Android 4.2.2) device, the application works well on other devices(Nexus 4/5/7).

The code in the Libcore/io/IoBridge.java looks like :

public static int sendto(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, int flags, InetAddress inetAddress, int port) throws IOException {
    boolean isDatagram = (inetAddress != null);
    if (!isDatagram && byteCount <= 0) {
        return 0;
    }
    int result;
    try {
        result = Libcore.os.sendto(fd, bytes, byteOffset, byteCount, flags, inetAddress, port);
    } catch (ErrnoException errnoException) {
        result = maybeThrowAfterSendto(isDatagram, errnoException);
    }
    return result;
}

while the Libcore.os.sendto() is a native call.

Maybe try one more time is a good candidate for workaround.