501851 - If appending to IMAP offline-store file is interfered with other software, mail data at offset=0 in offline-store(length=102,256 bytes) is used as mail data

Status: NEW

(MailNews Core :: Database, defect)

Description

[WADA:World Anti-bad-Duping Agency]

If appending to IMAP offline-store file is interfered with other software, mail data at offset=0 in offline-store(length=102,256 bytes) is used as mail data. 

[Build ID]
> Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.1pre) Gecko/20090630 Shredder/3.0b3pre

[Steps to produce]
(1) Folder-X contains multiple mails. Total data size>100KB. offline-use=Yes
    Some mails of small UID("Order Received") is text/plain mails.
    Delete Folder-X / Folder-X.msf, Restart Tb.
    Open Activity manager, and wait for sync.
    Confirm that mail data at offset=0 is text/plain mail.
(2) Open offline-store file(Folder-X) by external program(I used Sakura Editor)
(3) Copy some text/plain mails to IMAP folder Folder-X,
    open Folder-X, wait for end of sync(Activity Manager)
(4) Close offline-store file(Folder-X) by by external program. 
(5) View mail, View mail source, Save As - .eml
     => mail data at offset=0 is displayed/used
        mail data length = 102,256 bytes (file size of saved .eml file)

Write open error/Write error of offline-store file should be processed correctly.

Note:
Some of reports of "data of first mail was displayed" are possibley above phenomenon.

Comment 1

[WADA:World Anti-bad-Duping Agency]

Attachment: Screen shot of garbled display

mail-1 : zzzz  (written in offline-store)
mail-2 : a-01  (written in offline-store)
mail-3 : hello (write to offline-store is interfered by text editor)
mail-4 : From King VII (written in offline-store)

(mail-body of mail-1 = "zzzz" line) + (whole mail data for mail-2) + (whole mail data for mail-4) is displayed as mail body of mail-3.

Comment 2

[WADA:World Anti-bad-Duping Agency]

Phenomenon was changed by Tb 3.0.1. Bug 542723 is for Tb 3.0.1,

Comment 5

[Wayne Mery (:wsmwk)]

I occasionally see something like this (or perhaps one of the other issues cited in bug 714489)