Re: BUG : XMAIL 1.27 with SSL

U.Mutlu via xmail wrote on 05/26/2015 07:06 AM:
> Oversea Site via xmail wrote on 05/26/2015 05:14 AM:
>> No Log Error. No Fatal Error log. No Core Dump
>>
>> It's not RAM or HW problem. It's XMAIL internal issue, because when I switch
>> to stunnel, all problems solved. And then when I test K9-MAIL with
>> XMAIL+STUNNEL, K9 Client will not have any JAVA somethings Exception Error
>>
>> Two tests
>>
>> 1. Very Important Thing in Xmail 1.27 Native SSL
>>
>> If the emailbox has many emails such as 10000, Microsoft Outlook with SSL or
>> NON-SSL download them, it WILL NOT have this issue.
>> Some Tencent Foxmail for Windows, after finish ssl session, it will take the
>> server be FIN_WAIT2 (some version, not all)
>> But K9-MAIL for Android, Download first 1000, it will appear the error in
>> K9-MAIL randomly.
>>
>>
>> 2. Xmail 1.27 + Stunnel Proxy
>>
>> If the emailbox has many emails such as 10000, Microsoft Outlook with SSL or
>> NON-SSL download them, it WILL NOT have this issue.
>> Some Tencent Foxmail for Windows, after finish ssl session, it WILL NOT have
>> any problem. Server WILL NOT TAKE FIN_WAIT_2
>> K9-MAIL for Android, Download first 1000, it will NOT DISPLAY any error when
>> it finished download emails.
>
> I would need full description about the server HW and SW (OS version,
> xmail start params etc., any xmail patches applied etc.).
>
> There is of course also the possibility that the bug lies in the
> said mobile client program, especially if it goes online via
> unstable mobile links as it seems to be a link latency problem,
> or the client does not close the socket cleanly. Take a look at these:
> https://github.com/Automattic/socket.io/issues/1380
> http://stackoverflow.com/questions/5328155/preventing-fin-wait2-when-closing-socket

Check this too:

# cat /proc/sys/net/ipv4/tcp_fin_timeout
60

The following page is informative too:
http://httpd.apache.org/docs/2.0/misc/fin_wait_2.html

-- 
cu
Uenal

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