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[address@concealed]

The tricky part in debugging this is that it is so infrequent.  (twice out of thousands of moderated messages) It just happens to be hitting the University Administrations Daily announcements list. :)

I think it is OK in the msg/ spool since the copy that was sent to the moderators for approval was complete.  And mail logs confirm that it was complete going into and out of Sympa at that time.

Then, several minutes later when they send the approval message back to Sympa, the message is sent out truncated.  This indicates to me that the problem is with the write to or the read from the moderated/ spool.

Sympa is running on a SAN partition.  In theory that should not be causing a problem.  (my favorite saying - "Theory and practice are the same in theory.")  But I suspect that we might be seeing some kind of read/write delay that is causing Sympa to terminate the I/O early.

On Apr 18, 2006, at 7:34 AM, Olivier Salaün - CRU wrote:

You need to investigate to find out at what stage the message is truncated ; perform as follows :

1. send a message to the moderated list
2. check the message in sympa's moderation spool ; if it is already corrupted, then you should have another try with sympa.pl process stopped, so you have time to check the message in sympa's msg/ spool
3. subscribe a local (to the server) user and another user (eg you) to the list
   
4. validate the moderated message
5. check if both copy of the message (sent to both users) are the same. It might indicate a problem with one SMTP server.
   

address@concealed wrote:

We have had several cases where a moderated message is truncated  after approval.

The original message comes into Sympa and is sent to the moderators  without any problems.  But when the moderator approves the message a  truncated copy of the message is sent out.

In the first case the message was truncated at exactly 32k  characters.  Today's truncation was at 22,552 characters. (at least  that is how big sendmail says the mail was when it get it from  Sympa)  In both cases the original was much larger.  There are no  errors in the log files.  It looks like the message is getting  truncated either in the copy to the moderation spool or in the read  from the moderation spool.

Sympa has been working well for about a year now and except for these  two instances (both with the same list) I have heard of no other  problems like this.  The list in question is used every day and has  only had two problems about two weeks apart.

Does anyone have any thought on what could be going on here?

Sympa 5.0 / Oracle DB / Solaris / 1350 lists / 40,000 users

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