Re: error flushing output to client

[Alan Brown]

On Mon, 19 Sep 2005, GioiaBa wrote:

> but I know for sure that Some of those, do NOT have Norton Antivirus 2005
> installed.. so there has to be another reason for this..
> but I know it is not simple to find out why it happens..

large messages, slow connections, short timeouts set on the clients
(default is usually 60 seconds per message)

Re: error flushing output to client

[GioiaBa]

Thanks Daniel 

well in fact, I don't konw the pc user environment for all users having 
these trouble sometimes..
but I know for sure that Some of those, do NOT have Norton Antivirus 2005 
installed.. so there has to be another reason for this..
but I know it is not simple to find out why it happens.. 

any other hints will be appreciated.. 


thanks again..
: ) 



Daniel Senie Scrive: 


At 08:56 AM 9/19/2005, GioiaBa wrote:

Hi list !
my problem is that I have these entries in my /var/log/maillog file
#
Sep 18 10:31:36 mail popper[13054]: I/O error flushing output to client 
user1 at adsl000.domain.com.au [xxx.xxx.xxx.xxx]: Operation not permitted 
(1)


This error indicates the TCP session has gone away from under qpopper. In 
other words, the TCP session was closed because the remote endpoint (PC in 
this case) closed the connection. 


#
and the client itself (using Oexpress or Outlook) gets an error that it 
disappears when it do 'send and receive' once again..

it happens not all days, and not for all the users..
I searched the list, and found someonelse having the same trouble, but I 
can't still have a solution...

I'm running slackware 10 with
log2db-0.6 ; qpopper4.0.5 ; sendmail 8.12.11
thanks anyone..


Generally this is caused by timeouts that are too short on the PC, or 
antivirus software doing dumb things, with the latter becoming epidemic of 
late. We've moved a lot of customers to POP on alternate port with TLS 
(TCP/995) to get their email away from the interference caused by the 
latest live updates to Norton Antivirus 2005. There may be a better 
solution to dealing with Norton (configuration, bug fix, or uninstall) but 
this work-around has at least made it possible to keep customers 
functional. Your problem may or may not be at all related to antivirus, 
but it's something to look at.  





GB 

Re: error flushing output to client

[Daniel Senie]

At 08:56 AM 9/19/2005, GioiaBa wrote:

Hi list !
my problem is that I have these entries in my /var/log/maillog file
#
Sep 18 10:31:36 mail popper[13054]: I/O error flushing output to 
client user1 at adsl000.domain.com.au [xxx.xxx.xxx.xxx]: Operation 
not permitted (1)


This error indicates the TCP session has gone away from under 
qpopper. In other words, the TCP session was closed because the 
remote endpoint (PC in this case) closed the connection.



#
and the client itself (using Oexpress or Outlook) gets an error that 
it disappears when it do 'send and receive' once again..

it happens not all days, and not for all the users..
I searched the list, and found someonelse having the same trouble, 
but I can't still have a solution...

I'm running slackware 10 with
log2db-0.6 ; qpopper4.0.5 ; sendmail 8.12.11
thanks anyone..


Generally this is caused by timeouts that are too short on the PC, or 
antivirus software doing dumb things, with the latter becoming 
epidemic of late. We've moved a lot of customers to POP on alternate 
port with TLS (TCP/995) to get their email away from the interference 
caused by the latest live updates to Norton Antivirus 2005. There may 
be a better solution to dealing with Norton (configuration, bug fix, 
or uninstall) but this work-around has at least made it possible to 
keep customers functional. Your problem may or may not be at all 
related to antivirus, but it's something to look at. 

Re: error flushing output to client

[Netlink Tech]

I am using enable-chunky-writes, enable-hash-spool=2, 
enable-temp-drop-dir, enable-standalone.
The temp drop is not on a seperate partition right now, but I can try that too.
Thnx
On Thu, 3 Mar 2005, Tim Villa wrote:

> Try enable-chunky-writes, and perhaps having the temp drop folder residing 
> on a separate partition from your mail spools.  Both will address 
> performance issues - the first for the link, the second for the server disk 
> IO.
> 
> At 02:44 2005/03/03, Netlink Tech wrote:
> >Hello,
> >
> >Is this still active?
> >
> >Trying to find info on 'error flushing output to client' errors with
> >qpopper 4.05, Linux, etc.
> >
> >Most of problems are slow connections and/or large messages and/or large
> >number of messages.
> >
> >What is the solution to not have these problems.
> >
> >OR what is a suitable replacement for qpopper?
> >
> >Tried cucipop, but I have a number of users that use PINE to read e-mail,
> >which causes problems with UIDL and messages appearing as new (another
> >copy downloaded) to Outlook Express.
> >
> >Thanks,
> >Curt
> 
> --
> Tim Villa, Network / Systems Administrator
> M252, Business School and Law School
> The University of Western Australia CRICOS provider number 00126G
> Phone: +61-8-6488-1796, Fax: +61-8-6488-1068
> Mail  WWW 
> 
> 

Re: error flushing output to client

[Tim Villa]

Try enable-chunky-writes, and perhaps having the temp drop folder residing 
on a separate partition from your mail spools.  Both will address 
performance issues - the first for the link, the second for the server disk IO.

At 02:44 2005/03/03, Netlink Tech wrote:
Hello,
Is this still active?
Trying to find info on 'error flushing output to client' errors with
qpopper 4.05, Linux, etc.
Most of problems are slow connections and/or large messages and/or large
number of messages.
What is the solution to not have these problems.
OR what is a suitable replacement for qpopper?
Tried cucipop, but I have a number of users that use PINE to read e-mail,
which causes problems with UIDL and messages appearing as new (another
copy downloaded) to Outlook Express.
Thanks,
Curt
--
Tim Villa, Network / Systems Administrator
M252, Business School and Law School
The University of Western Australia CRICOS provider number 00126G
Phone: +61-8-6488-1796, Fax: +61-8-6488-1068
Mail  WWW 

Re: error flushing output to client

[Kenneth Porter]

On Mon, 2002-04-08 at 08:52, Nathan Martinez wrote:
> I have run across a problem with one of our clients.  They are using
> Microsoft Outlook 2000 in Workgroup mode.  Each time that they try to get
> their mail, this error shows up in my logs:
> 
> Apr  8 18:45:10 mail in.qpopper[18979]: I/O error flushing output to client
> laptop at 172.18.203.200 [172.18.203.200]: Operation not permitted (1)
> 
> This user has quite a bit of mail (50MB), but it should still work.  Has
> anyone ran across this problem before?  Thanks for your help.

Looks like a classic client-side timeout. Qpopper is busy copying the
spool right after the password is issued, and Outlook is timing out
waiting for this to complete.