Why can't upload the file to the server?

Question

Java

I'm trying to upload a file to a server that I'm connecting to via the WebDAV protocol.
It turns out to upload small files. But files in the region of 50KB (+ -5KB) will most likely not be sent (but they can, if it doesn’t have to). Files with a large weight, respectively, are not transferred at all.
Most common mistake:

Exception in thread "main" java.net.SocketException: Software caused connection abort: socket write error
  at java.net.SocketOutputStream.socketWrite0(Native Method)

There is also this one:

Exception in thread "main" java.net.SocketException: Connection reset by peer: socket write error
  at java.net.SocketOutputStream.socketWrite0(Native Method)

But it is more difficult to get it (pops up in the same conditions).
Server request code:

byte[] data = getDataForRequest();
//ByteArrayEntity byteArrayEntity = new ByteArrayEntity(data);
BasicHttpEntity entity = new BasicHttpEntity();

HttpPut httpPut = new HttpPut(file);
//httpPut.setEntity(new BufferedHttpEntity(byteArrayEntity));

ByteArrayInputStream bis = new ByteArrayInputStream(data);
entity.setContent(bis);
entity.setContentLength(data.length);
httpPut.setEntity(new BufferedHttpEntity(entity));

setCommonHeaders(httpPut);

HttpResponse response = getClient().execute(HTTP_HOST, httpPut);

Note: The Apache HttpComponents library is being used
. What could be the problem? I remind you that the code works for small files.