[PD-dev] [ pure-data-Bugs-1891178 ] netsend/netreceive sometimes drop data

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Bugs item #1891178, was opened at 2008-02-11 15:45
Message generated for change (Comment added) made by sistisette
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Category: puredata
Group: v0.40.1
>Status: Closed
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: Matteo Sisti Sette (sistisette)
Assigned to: Nobody/Anonymous (nobody)
>Summary: netsend/netreceive sometimes drop data

Initial Comment:
If you send a great enough number of messages throught a netsend immediately after the connection is established (for example triggered by the 1 output of netsend), the first messages are lost (and no error message issued). Netreceive receives some corrupted data, and then the last N messages sent.

The attached patch illustrates the problem.


** TEST PROCEDURE:
Click on the [connect ...( message box

** EXPECTED BEHAVIOUR:
On PD output window the following should appear:

CONNECTED: 1
DATA: bla bla 1
DATA: bla bla 2
DATA: bla bla 3
...
DATA: bla bla 1000

** OBSERVED BEHAVIOUR
The following output appears:
CONNECTED: 1
DATA: 53
DATA: bla bla 954
DATA: bla bla 955
...
DATA: bla bla 1000

====

Note that if you later click the [bng], all works as expected, i.e. no message is lost: message loss only seems to happen when too many messages are sent immediately after connection.


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>Comment By: Matteo Sisti Sette (sistisette)
Date: 2008-02-17 17:11

Message:
Logged In: YES 
user_id=1709568
Originator: YES

fixed in 0.41-2

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Comment By: Nobody/Anonymous (nobody)
Date: 2008-02-13 12:54

Message:
Logged In: NO 

This DOESN'T ONLY happen when the burst of messages is sent immediately
after connection.

I have experienced message loss even sending a big burst of messages to a
netsend that has been connected for a long time.

I may send a burst of M messages and loose messages K through N with
0<K<N<M.
In this case message N+1 is corrupted (its last part is received).

Also, it seems that the burst doesn't need to be sent in 0 logical time to
reproduce the bug. It seems it is sufficient to send enough messages in
enough little time.

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