I think in general our website documentation is not complete and I think it
would be great if we could improve it significantly. For instance, there is
no place where all configurations are described properly (other than
reading the code). I think that PRs and help in improving the doc would be
highly appreciated.
Thanks,
Marco
On Tue, 16 Apr 2019, 05:13 Meisam Fathi, wrote:
> Hi Peter,
>
> Are you using ZooKeeper for recovery store?
> If yes, in conf/livy.conf, is
> livy.server.recovery.zk-state-store.key-prefix
> set to different values in different Livy instances? If not, all of Livy
> instances will read/write the recovery data from/to the same path, which is
> default is /livy/v1 by default.
>
> @dev mailing list:
> This behavior is not documented in livy.conf nor on the website. It might
> be a good idea to document it somewhere.
>
> Thanks,
> Meisam
>
> On Fri, Apr 12, 2019 at 3:20 PM Meisam Fathi
> wrote:
>
> > Hi Peter,
> >
> > Livy 0.6 has a new feature to give each session a name:
> > https://github.com/apache/incubator-livy/pull/48
> >
> > Would this feature be useful in your usecase?
> >
> > Thanks,
> > Meisam
> >
> > On Fri, Apr 12, 2019, 8:51 AM Peter Wicks (pwicks)
> > wrote:
> >
> >> Greetings,
> >>
> >>
> >>
> >> I have a custom service that connects to Livy, v0.4 soon to be v0.5 once
> >> we go to HDP3. If sessions already exist it logs the session ID’s and
> >> starts using them, if sessions don’t exist it creates new ones. The
> problem
> >> is the account used to launch the Livy sessions is not unique to this
> >> service, nor is the kind of session. So sometimes it grabs other
> people’s
> >> sessions and absconds off with them. Also, there are multiple instances
> of
> >> the service, running under the same account, and they are not supposed
> to
> >> use each other’s sessions… that’s not working out so well.
> >>
> >>
> >>
> >> The service names the sessions, but I can’t find any way to retrieve
> >> detailed session data so that I can update the service to check if the
> Livy
> >> Session belongs to the service or not.
> >>
> >>
> >>
> >> I found some older comments 2016/2017 about retrieving Livy sessions by
> >> name. I don’t really need that, I just want to be able to read the name
> >> through the regular sessions REST call.
> >>
> >>
> >>
> >> Any REST calls I missed, or undocumented calls… that can help?
> >>
> >>
> >>
> >> Thanks,
> >>
> >> Peter
> >>
> >>
> >>
> >> Ref:
> >>
> https://github.com/meisam/livy/wiki/Design-doc-for-Livy-41:-Accessing-sessions-by-name
> ,
> >> https://issues.cloudera.org/browse/LIVY-41
> >>
> >>
> >>
> >>
> >>
> >
>
