Bad udp checksum is a side effect of wireshark when offloading is enabled.
What is happening is that wireshark captures the data before the TX offloaded
checksumming occurs. So the TX looks incorrect, but it’s intentional because
the hardware will do it instead. RX should look fine, and every TX should
*look* like bad checksum if offload enabled, but it’s actually going to be fine
on the wire.
From: banuchka [mailto:tyrche...@gmail.com]
Sent: Friday, April 14, 2017 7:53 AM
To: xCAT Users Mailing list; Jarrod Johnson
Subject: Re: [xcat-user] Confluent as console server. Consoles hangs ~after 24h.
I can see keepalive messages to consoles… and I've seen “bad udp cksum” hope
that is a problem.
I’ve turned off TX/RX offloading(and generic offloading as well) on my eth
card. Now tcpdump on 623 looks much better.
On 14 April 2017 at 12:42:03, Jarrod Johnson
(jjohns...@lenovo.com<mailto:jjohns...@lenovo.com>) wrote:
If you ctrl-e, c, o, does it restore the console after the time?
Can you tell that it goes after exactly 24hours on the dot?
When console hung, does ‘ipmitool sol activate’ say ‘session already active’?
Does /var/log/confluent/consoles/<nodename> have any interesting events crop up?
Pyghmi will do keepalive as well, and if that’s the problem, it should be much
shorter than 24 hours. In fact, it should be checking if the SOL payload is
active and owned by confluent specifically every couple of minutes.
From: banuchka [mailto:tyrche...@gmail.com]
Sent: Friday, April 14, 2017 5:55 AM
To: xcat-user@lists.sourceforge.net<mailto:xcat-user@lists.sourceforge.net>
Subject: Re: [xcat-user] Confluent as console server. Consoles hangs ~after 24h.
My last reply was incorrect. Problems still here. Im trying to find something
usefull inbetween confluent/pyghmi...
Confluent restart solves hangs/reopen all connections.
I think it isnt the best option to restart confluent 1 or 2 times in 24h.
--
banuchka
On 13 April 2017 at 17:03:19, banuchka
(tyrche...@gmail.com<mailto:tyrche...@gmail.com>) wrote:
It is Dell’s related problem, not 100% but…
Confluent from current master is doing things well :)
Thanks for pretty nice tool “confluentdbutil".
On 13 April 2017 at 11:30:14, banuchka
(tyrche...@gmail.com<mailto:tyrche...@gmail.com>) wrote:
Looks like that problem was before… The fix was to use ipmitool with
keepalive(one from xcat repos).
Here pyghmi is used maybe that the reason?
On 13 April 2017 at 08:22:28, banuchka
(tyrche...@gmail.com<mailto:tyrche...@gmail.com>) wrote:
Hi,
Im trying to completely migrate from conserver to confluent, but catch strange
behaviour.
Some of my consoles hangs ~after 24, so no any new messages in their logs or in
rcons.
I send messages with timestamp from OS >/dev/console every 30-60min and take a
look on them for monitoring purposes(consoles availability monitoring).
I can open rcons and hit enter, after few secs console is waking up(strange). I
didnt see it happen with conserver or maybe im wrong...
Some details:
- as i can see the bigest part of consoles with hangs behaviour are Dell idrac.
Doesnt matter which type of RacSerial or IPMISerial is in use.
- racreset hard/ipmitool bmc reset didnt do the things
- hit enter to console wake it up(for example with expect i can send \r\n\f,
but it looks bad)
- i didnt try to clean confluent's conf and restart it. Not sure it may help.
- HP consoles works well, same ipmi
- few consoles with custom pluging works good as well
So maybe my question is not about confluent, but if some of you have some
knowledge about same problems please share it! ;)
--
banuchka
--
banuchka
--
banuchka
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