java - InputStream returns -1 before end of file -

i'm streaming file server , streaming out socket (basically stream proxy). being used buffer song. once buffer full, no more data read socket until buffer empties out. however, once more data read, inputstream read x more bytes, return -1 signaling end of file, when not. there timeout happening?

here's example code:

  inputstream data = realresponse.getentity().getcontent();    ...some code...    int totalbytes = 0;   int count = 0;   // start streaming content.   byte[] buff = new byte[1024 * 50];   while (isrunning && (readbytes = data.read(buff, 0, buff.length)) != -1) {     totalbytes += readbytes;      log(count + ": buffer:" + buff + " readbytes:" + readbytes + " total:" + totalbytes);     client.getoutputstream().write(buff, 0, readbytes);     log("finished write");     count++;              } 

an example of log like:

0: buffer:b@45030a50 readbytes: 16164 total: 16164 1: buffer:b@45030a50 readbytes: 16384 total: 32548 ... 100: buffer:b@45030a50 readbytes: 16384 total: 1654564 <a long pause here> 100: buffer:b@45030a50 readbytes: 16384 total: 1670948 100: buffer:b@45030a50 readbytes: 16384 total: 1687332 -1 received 

any or suggestions appreciate

read() returns -1 @ end of stream , not before. if getting -1 earlier expected, data shorter expected, or server closing end earlier expected.