Thanks for guidelines! Ill try these paths out, and join the marathon 
mailing-list (was oblivious there was one ;))


Maciej Strzelecki
Operations Engineer
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________________________________
From: Vinod Kone <[email protected]>
Sent: Thursday, July 16, 2015 7:09 PM
To: [email protected]
Subject: Re: Marathon can no longer deploy any apps after a failover

Sounds like a marathon issue. Mind asking in marathon's mailing list?

On Thu, Jul 16, 2015 at 8:02 AM, Nikolay Borodachev 
<[email protected]<mailto:[email protected]>> wrote:
Maciej,

I had a similar problem but it got solved by setting LIBPROCESS_IP environment 
variable to the host IP address for the Marathon process.

Nikolay


From: Maciej Strzelecki 
[mailto:[email protected]<mailto:[email protected]>]
Sent: Thursday, July 16, 2015 7:30 AM
To: [email protected]<mailto:[email protected]>
Subject: Marathon can no longer deploy any apps after a failover


Problem:



If i restart a current framework leader for marathon ( the host from active 
frameworks tab in mesos ui) , a new one is elected after a moment and any new 
deployments are stuck infinitely at  'deploying' state (empty black bar, 0/1 
and hanging - with debug level i dont see any errors in marathon/mesos logs)

Also the old tasks are untouchable at that time - yes, they keep running, but 
cant kill, restart nor scale them.


When that happens i can:

stop marathon on all masters

remove the framework via a curl to mesos api /shutdown

purge /marathon from zookeper cli

restart docker services on all slaves (that kills the zombie containers)
restart mesos-slave services on all slaves (pampering my paranoia here)
then i can deploy apps again.



How can i avoid this problem? Any basic settings im missing? This is scary, as 
the reboot of a single master (out of 3 or 5 servers) freezes everything that 
is deployed using marathon, and the steps to reclaim control introduce downtime 
to every single app sunning there.









Configuration:



Running ubuntu 14.04.2. LTS

mesos                               0.22.1-1.0.ubuntu1404

marathon                            0.9.0-1.0.381.ubuntu1404

chronos                             2.3.4-1.0.81.ubuntu1404



The cluster  uses 3 masters and a 15 slaves. Also the master machines are 
running mesos-slave process (albeit those machines give only a  portion of 
resources as offerrings)



The configuration for mesos/marathon is very "default" dependant, options 
specified You can see below. The quorum is 2.



Marathon service is run on 3 master machines



root@mesos-master1 ~ # tree /etc/marathon/
/etc/marathon/
`-- conf
    |-- event_subscriber
    |-- framework_name
    |-- hostname
    |-- logging_level
    `-- zk

1 directory, 5 files
root@mesos-master1 ~ # tree /etc/mesos
/etc/mesos
`-- zk

0 directories, 1 file
root@mesos-master1 ~ # tree /etc/mesos-slave/
/etc/mesos-slave/
|-- containerizers
|-- docker_stop_timeout
|-- executor_registration_timeout
|-- executor_shutdown_grace_period
|-- hostname
|-- ip
|-- logging_level
`-- resources

0 directories, 8 files
root@mesos-master1 ~ # tree /etc/mesos-master
/etc/mesos-master
|-- cluster
|-- hostname
|-- ip
|-- logging_level
|-- quorum
`-- work_dir

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