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StreamCorruptedException  ?!

Posted on 2006-11-09
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Medium Priority
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Last Modified: 2008-03-17
I'm able to do the following with no problems at all:


Socket server=..;
..

out=new DataOutputStream(server.getOutputStream());
in =new DataInputStream(server.getInputStream());
oos=new ObjectOutputStream(server.getOutputStream());


But when I try the following:


ois=new ObjectInputStream(server.getInputStream());


I get the following exception:

java.io.StreamCorruptedException: invalid stream header: 00095253
      at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
           .
           .

(on the ObjectInputStream line..)


Help? :(

Thanks
0
Comment
Question by:InteractiveMind
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12 Comments
 
LVL 25

Author Comment

by:InteractiveMind
ID: 17910421
(The server-side is able to open all four streams no problem..)
0
 
LVL 92

Accepted Solution

by:
objects earned 1600 total points
ID: 17910465
you cannot open a ObjectInputStream and DataInputStream on the same stream like that, ?(and it doesn't make a lot of sense to do it).
You can try opening the OIS first, but I'd suggest not opening a DataInputStream.
0
 
LVL 86

Assisted Solution

by:CEHJ
CEHJ earned 400 total points
ID: 17912482
Was the stream *written* with ObjectOutputStream?
0
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LVL 25

Author Comment

by:InteractiveMind
ID: 17920985
Sorry for the delay guys;

I now see that using a DataInputStream and an OutputInputStream is rather illogical; so I've cut it down to just an ObjectInputStream. This has stopped the exception.

However, now, although I'm able to open an ObjectOutputStream with no problem
oos=new ObjectOutputStream(server.getOutputStream());
my code just hangs when I attempt to open an ObjectInputStream
ois=new ObjectInputStream(server.getInputStream());

(I open the ois straight after the oos)

I'm stumped.
0
 
LVL 86

Assisted Solution

by:CEHJ
CEHJ earned 400 total points
ID: 17921063
Is that happening *before* you try to read from that input stream?
0
 
LVL 25

Author Comment

by:InteractiveMind
ID: 17921071
yes
0
 
LVL 86

Assisted Solution

by:CEHJ
CEHJ earned 400 total points
ID: 17921077
Is it definitely this line that causes it to hang?

>>ois=new ObjectInputStream(server.getInputStream());
0
 
LVL 25

Author Comment

by:InteractiveMind
ID: 17921083
I'm pretty sure it is, yea.

I'm doing the following to make sure:

oos=new ObjectOutputStream(server.getOutputStream());
System.out.println("o");
ois=new ObjectInputStream(server.getInputStream());
System.out.println("i");

It outputs o, but no i (and there's no exception or anything..)  :-\
0
 
LVL 25

Author Comment

by:InteractiveMind
ID: 17922954
well, i'm in the process of recoding my program.
hopefully that will solve the problem (as i'll be more cautious..); i'll get back to ya'll soon.
0
 
LVL 92

Expert Comment

by:objects
ID: 17923409
> my code just hangs when I attempt to open an ObjectInputStream

change the order you open things at the other end
0
 
LVL 25

Author Comment

by:InteractiveMind
ID: 17923541
I tried that as well :(


As it goes though, I finished recoding the program just a few mins ago--and am not getting any problems with it :-)
So I'll just put this hanging problem down to bad coding :-P  (it's a large code-and-fix app)

So, I will split the points (although most will be to objects for his solution to my initial issue).


Thanks very much both
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 17924383
:-)
0

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