[Bugs] #3286 UNSP: (RACE CONDITION, only happens for files of small size, < ~ 10KB) No file-completion signal at the receiver

[Sugar Labs Bugs]

#3286: (RACE CONDITION, only happens for files of small size, < ~ 10KB) No file-
completion signal at the receiver
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    Reporter:  ajay_garg                  |          Owner:                             
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  untriaged                  |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:  olpc, dx3                  
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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 1. Initiate a file-transfer from the sender XO.

 2. "Accept" the invitation at the receiver XO.

 3. File gets transmitted (almost instanataneously) (note that it must be a
 file of small size). The file is also seen received in the journal at the
 receiving end.

 4. However, at the receiving or the sending end, there is no "Dismiss"
 option (that signifies end-of-transfer).

 5. Left with no choice, the receiver is forced to click the "Cancel"
 button.

 6. The received file in the journal, gets deleted.

 Again note, that this happens only for files of small size, and that too
 intermittently.

 The issue did not surface even once, when I tested with MP3s (of the order
 of Megabytes.)

 This (intermittent behaviour for small files) occurs on both os883.img and
 dx3g091.img.

 Also, see screenshots.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3286>
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