OutputStream.write（）成功，但此数据未送达

我在写一个插座一个很奇怪的行为。 在我的移动客户端我使用的是初始化的插槽如下：

I have a very strange behaviour during writing to a socket. In my mobile client I'm using a socket which is initialized as follows:

private void initSocket()
{
    socket = new Socket();
    socket.connect(new InetSocketAddress(host, port));

    os = new DataOutputStream(socket.getOutputStream());
    is = new DataInputStream(socket.getInputStream());
}

然后定期（每60秒），我阅读和写一些数据，这个​​插座（在code这里是一个有点简单）：

then periodically (every 60 seconds) I read and write some data to this socket (the code here is a little bit simplified):

if(!isSocketInitialized())
{
    initSocket();
}

byte[] msg = getMessage();

os.write(msg);
os.flush();

int bytesAvailable = is.available( );
if(bytesAvailable>0)
{
    byte[] inputBuffer = new byte[bytesAvailable];

    int numRead = is.read(inputBuffer, 0, bytesAvailable);
    processServerReply(inputBuffer, numRead);
}

和它的作品。但是......有时候（很频繁，每天可能1〜2次）我的服务器不接收数据。我的客户端日志是这样的：

And it works. But... Sometimes (very infrequently, maybe 1 or 2 times per day) my server don't receive data. My client log looks like:

Written A
Written B
Written C
Written D
Written E

等。但是在服务器端，它看起来像：

and so on. But on the server side it looks like:

Received A
Received E

B，C没有接收D个数据记录，尽管事实是在客户端，它看起来像所有数据被发送，没有任何例外！

B,C,D data records were not received, despite of fact that on the client side it looks like all data was sent without any exceptions!

这样的差距可以是小（2-3分钟），这是不是很糟糕，但有时也可以是非常大的（1-2小时= 60-120次），它是真正为我的客户一个问题。

Such gaps can be small (2-3 minutes) which is not very bad, but sometimes they can be very big (1-2 hours = 60-120 cycles) and it is really a problem for my customers.

我真的不知道有什么可以是错误的。该数据似乎是由客户端被发送，但它从未到达在服务器端。我检查它也有一个代理。

I really have no idea what can be wrong. The data seems to be sent by client, but it never arrives on the server side. I've checked it also with a proxy.

我只有日志，我无法重现此问题（但它发生在我的客户，每天一个以上的时间），并在日志有时我看到连接异常而破SENDTO失败：ECONNRESET（连接由同行复位）。之后，该程序将关闭套接字，重新初始化它：

I have only logs and I can't reproduce this issue (but it happens to my customer more then one time every day) and in logs sometimes I see that the connection is broken with an Exception "sendto failed: ECONNRESET (Connection reset by peer)". After that the program closes the socket, reinitializes it:

// close
is.close();
os.close();
socket.close();

// reinitialize
initSocket();

和尝试，如上所述，再次写入数据。然后，我看到了问题：连接建立，写成功，但没有数据到达服务器

and tries to write the data again as described above. Then I see the problem: connection established, writing successful, but NO DATA arrived on the server!

可能是它是与ECONNRESET可能是没有，但我想提一提这个，因为可能是很重要的。

May be it has something to do with ECONNRESET may be not, but I want to mention this because may be it is important.

我会很感激的任何想法和建议。

I would be very grateful for any ideas and tips.

P.S。也许它起着一定的作用：客户端code被移动（这是在汽车）的Andr​​oid移动设备上运行。互联网连接通过GPRS建立。

P.S. Maybe it plays some role: the client code runs on an Android mobile device which is moving (it is in a car). The internet connection is established through GPRS.

UPD：我可以重现它！至少部分地（客户端发送A，B，C，D，E和服务器只接收A）。它发生的每一次的话：

UPD: I can reproduce it! At least partially (the client send A,B,C,D,E and the server receives only A). It happens every time if:

1. 建立连接，客户端读取和写入 - >确定

1. The connection is established, the client reads and writes -> OK

的连接丢失（我关掉我的无线路由器:)），我成了IOException异常，我关闭了流和插座 - >确定

The connection is lost (I turn off my WLAN router :)), I became IOException, I close the streams and socket -> OK

我把我的路由器，连接又回来了，我再次初始化套接字，程序执行的write（）无异常，但没有数据......到达服务器。

I turn on my router, the connection is back, I initialize the socket again, the program executes write() without exceptions, but... no data arrives at the server.

顺便说一句，因为连接回来用（）返回始终为0。

BTW since the connection is back again available() returns always 0.