477363 - duplicated message downloads

Status: RESOLVED INCOMPLETE

(MailNews Core :: Networking: POP, defect)

Description

[zambaccian]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.20) Gecko/20081217 Firefox/2.0.0.20
Build Identifier: version 2.0.0.19 (20081209)

I'm using YPOP's to retrive Yahoo mail. 
Thunderbird downloads same messages for more than one time.
It's a Thunderbird problem (not a YPOP's one), since Outlook doesn't seem to behave this way.

Reproducible: Sometimes

Comment 1

[Matthias Versen [:Matti]]

Does it always do it or only sometimes ?
Did you selected to leave the messages on the server ?

Comment 2

[zambaccian]

It doesn't always reproduce. I set messages to stay on the server.

I set Thunderbird to retrive mail every minute, but this issue occurs randomly, maybe 2 or 3 times each half of hour. Most times, exactly 25 messages are retrived.

Since now, I have at least a duplicate for each message, but its interesting how Thunderbird does retrive duplicates especially for some messages (I can't figure the criteria, if one exists).

Comment 3

[Matthias Versen [:Matti]]

There could be 2 reasons why this happens:
a) Thunderbird is losing the UUID of the message stored in the message index files
b) the server is changing the UUID of some message

Comment 4

[WADA:World Anti-bad-Duping Agency]

(In reply to comment #0)
> since Outlook doesn't seem to behave this way.

Possibly due to difference of timeout setting. Timeout default of outlook family seems to be longer than Tb's one. (It seems for me that MS's default choice is practically better than Tb's choice.)

> User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1;

Get POP3 log with timestamp using DebugView.
> Bug 402793 Comment #1 : Getting NSPR log
> Bug 402793 Comment #6 : Getting NSPR log with timestamp using DebugView on Win
>   SET NSPR_LOG_MODULES=POP3:5
>   SET NSPR_LOG_FILE=WinDebug

> I set Thunderbird to retrieve mail every minute,

Increase the interval value. Will frequency of problem be reduced?

By the way, you enable "Leave messages on server". Is it right?

Comment 5

[WADA:World Anti-bad-Duping Agency]

See RFC 1939 for POP3 command/response.
> http://www.faqs.org/rfcs/rfc1939.html

If you enable "Leave messages on server", keep backup of popstate.dat too.
0. Disable automatic download of all other POP3 accounts.
   (To keep log file small) 
1. Keep backup of postate.dat (UUID of already downloaded mail is held in it)
2. Start Tb, with NSPR logging, with DebugView
3. Save log, and clear display of DebugView, if log becomes large.
4. When problem occurs, keep backup of postate.dat and terminate Tb.
5. Keep backup of postate.dat.
6. Save final log by DebugView.

If Tb's fault is found in log, and if log analysis by developers is required, attach log files(and backups of popstate.dat) to this bug.

Comment 6

[Magnus Melin [:mkmelin]]

Duplicate of bug 263142/bug 237131?

Comment 7

[Wayne Mery (:wsmwk)]

 zambaccian see questions in comment 4, and need log mentioned in comment 4

Comment 8

[Wayne Mery (:wsmwk)]

=> incomplete due to no response from reporter.
please reopen if you can reproduce in version 3.