Groups > comp.lang.java.programmer > #8489

Buffered reading seems to corrupt data stream

Path	csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!nx02.iad01.newshosting.com!newshosting.com!69.16.185.11.MISMATCH!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!border3.nntp.dca.giganews.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.westnet.com.au!news.westnet.com.au.POSTED!not-for-mail
NNTP-Posting-Date	Mon, 03 Oct 2011 09:59:05 -0500
From	"Qu0ll" <Qu0llSixFour@gmail.com>
Newsgroups	comp.lang.java.programmer
Subject	Buffered reading seems to corrupt data stream
Date	Tue, 4 Oct 2011 01:58:41 +1100
MIME-Version	1.0
Content-Type	text/plain; format=flowed; charset="iso-8859-1"; reply-type=original
Content-Transfer-Encoding	7bit
X-Priority	3
X-MSMail-Priority	Normal
Importance	Normal
X-Newsreader	Microsoft Windows Live Mail 15.4.3538.513
X-MimeOLE	Produced By Microsoft MimeOLE V15.4.3538.513
Message-ID	<y4Cdne-uvN4kUBTTnZ2dnUVZ_hWdnZ2d@westnet.com.au> (permalink)
Lines	36
X-Usenet-Provider	http://www.giganews.com
NNTP-Posting-Host	124.168.28.143
X-Trace	sv3-K8h8ellJvmKK7wXd03A4vBNnEP9NfauLotmcfojr8QeZTyoC5Z5yxjVD2x3EwdNKQ7rVwVMYg/PYhh1!7kYMuHUr0T1Kx5ucwrhQfER1bJuL6joY282+7dg2jkzvfiLa5PatajCjD9qErXkSZVx2qyCDnabL!5pDN8G9NIruiwA9sy9Kiig==
X-Complaints-To	abuse@westnet.com.au
X-Abuse-and-DMCA-Info	Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info	Otherwise we will be unable to process your complaint properly
X-Postfilter	1.3.40
X-Original-Bytes	2457
Xref	x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:8489

Show key headers only | View raw

I am trying to repeatedly send a byte array from a server to a client where 
both the writing and the reading is done in a buffered manner with the 
following code on the server:

DataOutputStream dos = new DataOutputStream(os);
dos.writeInt(bytes.length);
dos.write(bytes);
dos.flush();

and this on the client:

System.out.println("Reading size...");
final DataInputStream dis = new DataInputStream(new 
BufferedInputStream(is));
final int size = dis.readInt();
final byte[] bytes = new byte[size];
System.out.println("Reading " + size + " bytes...");
dis.readFully(bytes);

The problem is that for the second or third read, the size variable is 
coming back as garbage (extremely high or even negative value) and the 
reading of the byte array blocks as it waits for a large amount of data to 
be received or crashes with the invalid negative size even though the 
previous size value and the previous bytes themselves are correct.  However, 
if I remove the BufferedInputStream wrapping of stream, it works perfectly.

Why would that be?

--
And loving it,

-Qu0ll (Rare, not extinct)
_________________________________________________
Qu0llSixFour@gmail.com
[Replace the "SixFour" with numbers to email me]

Back to comp.lang.java.programmer | Previous | Next — Next in thread | Find similar

Thread

Buffered reading seems to corrupt data stream "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-10-04 01:58 +1100
  Re: Buffered reading seems to corrupt data stream "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-10-04 02:26 +1100
    Re: Buffered reading seems to corrupt data stream Ronny Schütz <usenet.r96@gishpuppy.com> - 2011-10-03 17:54 +0200
      Re: Buffered reading seems to corrupt data stream "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-10-04 07:07 +1100
        Re: Buffered reading seems to corrupt data stream Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-10-03 13:18 -0700
      Re: Buffered reading seems to corrupt data stream "Qu0ll" <Qu0llSixFour@gmail.com> - 2011-10-04 10:54 +1100
    Re: Buffered reading seems to corrupt data stream Roedy Green <see_website@mindprod.com.invalid> - 2011-10-03 11:46 -0700
  Re: Buffered reading seems to corrupt data stream Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-10-03 08:44 -0700
  Re: Buffered reading seems to corrupt data stream markspace <-@.> - 2011-10-03 11:33 -0700
    Re: Buffered reading seems to corrupt data stream Lew <lewbloch@gmail.com> - 2011-10-04 08:48 -0700
      Re: Buffered reading seems to corrupt data stream Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-10-04 09:07 -0700
        Re: Buffered reading seems to corrupt data stream Lew <lewbloch@gmail.com> - 2011-10-04 12:06 -0700

csiph-web