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From Enrico Olivelli <eolive...@gmail.com>
Subject Re: Re: ZooKeeper 3.5 blocker issues
Date Thu, 03 Jan 2019 21:20:21 GMT
Il gio 3 gen 2019, 16:49 Norbert Kalmar <nkalmar@cloudera.com.invalid> ha
scritto:

> Hi everyone, Happy New Year!
>
> My patches were merged today, so maven build should be working on master
> branch.
> There is still one Pr open about findbugs -
> https://github.com/apache/zookeeper/pull/742 (Thanks Enrico!)
> Annotations has been introduced instead of central xml, it's quite a
> change, but I agree it's better this way. Still, it's kind of a bigger
> change, so please have a look, and +1 or -1 if you like the new spotbugs
> annotations update.
> +1 from me! :)
>
> I will start to work on creating the assembly (ZOOKEEPER-3028), hopefully I
> will have the PR tomorrow.
>

We should change the release procedure as well, the best would be to use
maven release plugin, I may add that it is better for the release procedure
to run on docker so that we have a reproducible build environment.
We have already most of this stuff already in Bookkeeper project (thanks to
Sijie Guo), there is almost nothing special about about Bookkeeper.

https://bookkeeper.apache.org/community/release_guide/#prepare-release-branch

>
> If these two remaining tickets are done, CI integration can be started
> (ZOOKEEPER-3224), and various processes (release, pre-commit) can be tested
> with maven.
>

I will start a new email thread about this


Thank you Norbert!

Enrico


> Hopefully we will see maven running on Apache builds this month!
>
> Regards,
> Norbert
>
> On Fri, Dec 21, 2018 at 7:20 AM Enrico Olivelli <eolivelli@gmail.com>
> wrote:
>
> > Il ven 21 dic 2018, 04:24 毛蛤丝 <maoling199210191@sina.com> ha scritto:
> >
> > > @Norbert @Enrico
> > > About the checkstyle
> > > Since there were so many,many checkstyle violations in the zk code base
> > > so the CI with checkstyle should ingore the existing codes, only act
> upon
> > > the new codes(new PR)
> > > After that, we can clean up the violations in the code base one module
> by
> > > another,one package by another
> > > if we have the time(but i think we don't[smirk])
> > >
> >
> > Yes it is a task for 3.6.0. Not worth 3.5.
> > We can engage new contributors for this task. It is easy and it does not
> > require knowledge of ZK internals
> >
> > Enrico
> >
> >
> > ----- 原始邮件 -----
> > > 发件人:Enrico Olivelli <eolivelli@gmail.com>
> > > 收件人:DevZooKeeper <dev@zookeeper.apache.org>
> > > 主题:Re: ZooKeeper 3.5 blocker issues
> > > 日期:2018年12月20日 17点10分
> > >
> > >
> > > Great
> > > Il giorno gio 20 dic 2018 alle ore 10:07 Norbert Kalmar
> > > <nkalmar@cloudera.com.invalid> ha scritto:
> > > >
> > > > Subtasks:
> > > > Findbugs, checkstyle -
> > > https://issues.apache.org/jira/browse/ZOOKEEPER-3223
> > > We don't have checksyle. In my experience introducing checkstyle break
> > > every pending patch.
> > > I would like to narrow down this issue to "Spotbugs" and pick in up
> > > > CI integration -
> https://issues.apache.org/jira/browse/ZOOKEEPER-3224
> > > I would like to pick this up
> > > Enrico
> > > > Code coverage - https://issues.apache.org/jira/browse/ZOOKEEPER-3225
> > - I
> > > > laready started this one and some of it is committed with the patch,
> > so I
> > > > will continue to work on it.
> > > > Recipes and contrib -
> > > https://issues.apache.org/jira/browse/ZOOKEEPER-3171
> > > > - Already on it, recipes is done, PR soon available.
> > > > Assembly - https://issues.apache.org/jira/browse/ZOOKEEPER-3029
> > > >
> > > > This are the tasks left I can think of. If anything is missing, feel
> > free
> > > > to create a jira, or let me know.
> > > > The ones I'm already working on - 3225, 3171 - I made a comment,
> Those
> > > > should be ready this week.
> > > >
> > > > Thanks,
> > > > Norbert
> > > >
> > > >
> > > > On Thu, Dec 20, 2018 at 9:07 AM Enrico Olivelli <eolivelli@gmail.com
> >
> > > wrote:
> > > >
> > > > > Great.
> > > > > Can you create JIRA tickets for remaining subtask? So that I can
> pick
> > > them
> > > > > up?
> > > > > I volounter for spotbugs and for CI integration, but let's see the
> > list
> > > > > Enrico
> > > > >
> > > > > Il gio 20 dic 2018, 07:21 Andor Molnar <andor@apache.org> ha
> > scritto:
> > > > >
> > > > > > Ok. Looks like ant still works properly, so let’s commit this
> patch
> > > and
> > > > > > you guys can collaborate to polish the Maven build.
> > > > > >
> > > > > > For now, it’s master-only.
> > > > > >
> > > > > > Thanks,
> > > > > > Andor
> > > > > >
> > > > > >
> > > > > >
> > > > > > > On 2018. Dec 19., at 16:44, Norbert Kalmar
> > > > > <nkalmar@cloudera.com.INVALID>
> > > > > > wrote:
> > > > > > >
> > > > > > > Thank you Enrico, I agree, that we could commit this patch at
> > it's
> > > > > > current
> > > > > > > state, it fulfills the original jira anyways.
> > > > > > >
> > > > > > > I'll see what's wrong with the java tests, but honestly, it
> looks
> > > like
> > > > > > > they're just flaky... runs well on local builds with 8 thread.
> > > > > > >
> > > > > > > Regards,
> > > > > > > Norbert
> > > > > > >
> > > > > > > On Wed, Dec 19, 2018 at 2:50 PM Tamas Penzes
> > > > > <tamaas@cloudera.com.invalid
> > > > > > >
> > > > > > > wrote:
> > > > > > >
> > > > > > >> Hi All,
> > > > > > >>
> > > > > > >> For assembly task I would promote the way how HBase works.
> > > > > > >> They create a pure source and a bin tarball separately. Please
> > > see how
> > > > > > they
> > > > > > >> create a release here:
> > > > > > >>
> > > https://github.com/apache/hbase/blob/master/dev-support/make_rc.sh
> > > > > > >> We could probably use the well known "copy+paste technology"
> to
> > > have
> > > > > it
> > > > > > >> within ZooKeeper the same way. ;-)
> > > > > > >>
> > > > > > >> Regards, Tamaas
> > > > > > >>
> > > > > > >> On Wed, Dec 19, 2018 at 2:28 PM Enrico Olivelli <
> > > eolivelli@gmail.com>
> > > > > > >> wrote:
> > > > > > >>
> > > > > > >>> Great work Norbert
> > > > > > >>> I you want I can help,especially for rat, findbugs (need to
> > > switch to
> > > > > > >>> spotbugs anyway) and OWASP stuff (recently I started using
> > Maven
> > > > > > >>> Plugin in other projects)
> > > > > > >>> But I am not sure how can I help you concretely if we do not
> > > commit
> > > > > > your
> > > > > > >>> work.
> > > > > > >>> We could commit the work as it is now, leaving "ant" as
> > official
> > > > > build
> > > > > > >>> method, but having the poms committed will ease
> collaboration.
> > > > > > >>>
> > > > > > >>> We will also have to work on CI jobs, I can help on that part
> > as
> > > well
> > > > > > >>>
> > > > > > >>> Enrico
> > > > > > >>>
> > > > > > >>> Il giorno mer 19 dic 2018 alle ore 12:26 Norbert Kalmar
> > > > > > >>> <nkalmar@cloudera.com.invalid> ha scritto:
> > > > > > >>>>
> > > > > > >>>> Hi everyone,
> > > > > > >>>>
> > > > > > >>>> Some update on the maven migration: I had a few bumps here
> and
> > > there
> > > > > > >>> (just
> > > > > > >>>> looking at the latest patch Andor linked -
> > > > > > >>>> https://github.com/apache/zookeeper/pull/708 - you can see
> on
> > > the
> > > > > > >>> commits).
> > > > > > >>>> Current state is that the build works, tests run, but
> reports
> > > like
> > > > > > >>>> findbugs, clover etc. are not yet implemented. Maven has
> > > plugins for
> > > > > > >> them
> > > > > > >>>> usually, but it's not always trivial, especially with the C
> > > client.
> > > > > > The
> > > > > > >>>> assembly is also left to be done, but it should be fairly
> easy
> > > to
> > > > > do a
> > > > > > >>>> similar tarball then ant does (although this will be also an
> > > > > > >> interesting
> > > > > > >>>> task, as ant does some strange things, like duplicated
> sources
> > > of
> > > > > most
> > > > > > >>>> contrib projects).
> > > > > > >>>>
> > > > > > >>>> I had a seperate jira to do the recipes and contrib maven
> > > build. I
> > > > > do
> > > > > > >> not
> > > > > > >>>> have open PR for it, but recipes is done and I am now
> working
> > > on the
> > > > > > >>>> contrib projects. Most of them is manually build and never
> > gets
> > > > > called
> > > > > > >>> from
> > > > > > >>>> the main build.xml. I will not integrate these either to the
> > > maven
> > > > > > >> build.
> > > > > > >>>> The reason is that there are plans to remove some of them
> from
> > > ZK
> > > > > repo
> > > > > > >>>> anyway. The other reason is that for starters, we want to
> > > replicate
> > > > > > the
> > > > > > >>> ant
> > > > > > >>>> build as closely as possible, without doing any nasty
> > > workarounds in
> > > > > > >>> maven
> > > > > > >>>> to achieve that. And from there, we can improve, use maven's
> > > > > > advantages
> > > > > > >>> to
> > > > > > >>>> shape the build of ZooKeeper. Once it is stable and proven
> to
> > > have
> > > > > all
> > > > > > >>> the
> > > > > > >>>> functionality required for build and release.
> > > > > > >>>>
> > > > > > >>>> Right now, I am trying to stabilize the build as much as
> > > possible.
> > > > > > >> Andor
> > > > > > >>>> also fixed some flaky C tests that for some strange reasons,
> > > become
> > > > > > >>>> extremely flaky with the maven build:
> > > > > > >>>> https://github.com/apache/zookeeper/pull/740
> > > > > > >>>>
> > > > > > >>>> Regards,
> > > > > > >>>> Norbert
> > > > > > >>>>
> > > > > > >>>> On Tue, Dec 18, 2018 at 9:52 AM Andor Molnar
> > > > > > >> <andor@cloudera.com.invalid
> > > > > > >>>>
> > > > > > >>>> wrote:
> > > > > > >>>>
> > > > > > >>>>> Sure, good point. Let's put it on the list.
> > > > > > >>>>>
> > > > > > >>>>> Andor
> > > > > > >>>>>
> > > > > > >>>>>
> > > > > > >>>>> On Tue, Dec 18, 2018 at 12:17 AM Patrick Hunt <
> > > phunt@apache.org>
> > > > > > >>> wrote:
> > > > > > >>>>>
> > > > > > >>>>>> Are folks OK to wait on that OWASP issue I documented over
> > the
> > > > > > >>> weekend?
> > > > > > >>>>>> afaict we are not affected but it would be good to get
> > another
> > > > > pair
> > > > > > >>> of
> > > > > > >>>>> eyes
> > > > > > >>>>>> on it.
> > > > > > >>>>>>
> > > > > > >>>>>> Patrick
> > > > > > >>>>>>
> > > > > > >>>>>> On Mon, Dec 17, 2018 at 2:55 PM Andor Molnár <
> > > andor@apache.org>
> > > > > > >>> wrote:
> > > > > > >>>>>>
> > > > > > >>>>>>> Hi team,
> > > > > > >>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>> I'm proudly announce that thanks to the joint effort from
> > the
> > > > > > >>>>> community,
> > > > > > >>>>>>> the 3.5 blockers list has become empty:
> > > > > > >>>>>>>
> > > > > > >>>>>>> "project = ZooKeeper AND resolution = Unresolved AND
> > > fixVersion =
> > > > > > >>> 3.5.5
> > > > > > >>>>>>> AND priority in (blocker, critical) ORDER BY priority
> DESC,
> > > key
> > > > > > >>> ASC"
> > > > > > >>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>> Well... almost. All the blocker issues have gone, but we
> > > still
> > > > > > >>> have the
> > > > > > >>>>>>> Maven migration to complete before the stable release. If
> > you
> > > > > > >> have
> > > > > > >>> some
> > > > > > >>>>>>> free cycles, please join us testing the Maven build on
> this
> > > PR:
> > > > > > >>>>>>>
> > > > > > >>>>>>> https://github.com/apache/zookeeper/pull/708
> > > > > > >>>>>>>
> > > > > > >>>>>>> I hope we can merge it pretty soon.
> > > > > > >>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>> In terms of the builds, the weather at 3.5 branch is
> quite
> > > sunny
> > > > > > >>>>>> nowadays:
> > > > > > >>>>>>>
> > > > > > >>>>>>> https://builds.apache.org/view/S-Z/view/ZooKeeper/
> > > > > > >>>>>>>
> > > > > > >>>>>>> The Java 11 build is still having some difficulties,
> which
> > > > > > >>> hopefully I
> > > > > > >>>>>>> can address before the holidays:
> > > > > > >>>>>>>
> > > > > > >>>>>>> https://issues.apache.org/jira/browse/ZOOKEEPER-3204
> > > > > > >>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>> If you happen to know about something which is important
> > from
> > > > > > >> 3.5's
> > > > > > >>>>>>> perspective and missing from the above, please don't
> > > hesitate to
> > > > > > >>> share.
> > > > > > >>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>> Happy ZooKeeping!
> > > > > > >>>>>>>
> > > > > > >>>>>>> Andor
> > > > > > >>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>> On 11/2/18 21:12, Fangmin Lv wrote:
> > > > > > >>>>>>>> Andor,
> > > > > > >>>>>>>>
> > > > > > >>>>>>>> Here is the PR to port ZK-3104 from master to 3.4:
> > > > > > >>>>>>>> https://github.com/apache/zookeeper/pull/685.
> > > > > > >>>>>>>>
> > > > > > >>>>>>>> Fangmin
> > > > > > >>>>>>>>
> > > > > > >>>>>>>> On Fri, Nov 2, 2018 at 11:46 AM Fangmin Lv <
> > > > > > >> lvfangmin@gmail.com>
> > > > > > >>>>>> wrote:
> > > > > > >>>>>>>>
> > > > > > >>>>>>>>> Hi Andor,
> > > > > > >>>>>>>>>
> > > > > > >>>>>>>>> Is anyone working on ZK-2778? I can pick it up if there
> > is
> > > no
> > > > > > >>> one
> > > > > > >>>>>>> working
> > > > > > >>>>>>>>> on it yet.
> > > > > > >>>>>>>>>
> > > > > > >>>>>>>>> I'll open a 3.5 PR for ZK-3104 today.
> > > > > > >>>>>>>>>
> > > > > > >>>>>>>>> Fangmin
> > > > > > >>>>>>>>>
> > > > > > >>>>>>>>> On Fri, Oct 26, 2018 at 3:33 AM Andor Molnar <
> > > > > > >> andor@apache.org>
> > > > > > >>>>>> wrote:
> > > > > > >>>>>>>>>
> > > > > > >>>>>>>>>> Hi folks,
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>>>> You’ve probably realised lots of update emails coming
> > from
> > > > > > >>> Jira.
> > > > > > >>>>>> Please
> > > > > > >>>>>>>>>> be aware that we’ve updated a bunch of open
> > > blocker/critical
> > > > > > >>> 3.5
> > > > > > >>>>>>> tickets to
> > > > > > >>>>>>>>>> reflect to what we discussed in this email.
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>>>> If you open up the following jira filter:
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>>>> project = ZooKeeper and resolution = Unresolved and
> > > > > > >> fixVersion
> > > > > > >>> =
> > > > > > >>>>>> 3.5.5
> > > > > > >>>>>>>>>> AND priority in (blocker, critical) ORDER BY priority
> > > DESC,
> > > > > > >>> key ASC
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>>>> You’ll see the most up-to-date list of tickets which
> > need
> > > to
> > > > > > >> be
> > > > > > >>>>>>> addressed
> > > > > > >>>>>>>>>> before the stable 3.5 release.
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>>>> Thank you for your efforts to get this done.
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>>>> Fangmin, ZK-3104 is waiting for backport, but ticket
> has
> > > > > > >>> already
> > > > > > >>>>> been
> > > > > > >>>>>>>>>> resolved. Have you created a separate ticket for the
> > > backport
> > > > > > >>> or
> > > > > > >>>>>> shall
> > > > > > >>>>>>> I
> > > > > > >>>>>>>>>> just reopen it with the right fix versions?
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>>>> Thanks,
> > > > > > >>>>>>>>>> Andor
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>>>>> On 2018. Oct 8., at 12:34, Andor Molnar <
> > > andor@apache.org>
> > > > > > >>> wrote:
> > > > > > >>>>>>>>>>>
> > > > > > >>>>>>>>>>> Hi,
> > > > > > >>>>>>>>>>>
> > > > > > >>>>>>>>>>> Let me summarize and give a quick update on the
> > > outstanding
> > > > > > >>> issues
> > > > > > >>>>>> for
> > > > > > >>>>>>>>>> 3.5 GA:
> > > > > > >>>>>>>>>>> - ZOOKEEPER-1818 (Fix don't care for trunk)
> > > > > > >>>>>>>>>>> - ZOOKEEPER-2778 (Potential server deadlock between
> > > follower
> > > > > > >>> sync
> > > > > > >>>>>> with
> > > > > > >>>>>>>>>> leader and follower receiving external connection
> > > requests.)
> > > > > > >>>>>>>>>>> - ZOOKEEPER-3021 Migrate project structure to Maven
> > > > > > >> (ongoing)
> > > > > > >>>>>>>>>>> - ZOOKEEPER-925 Docs generation to Maven
> > > > > > >>>>>>>>>>> - ZOOKEEPER-3104 (waiting for backport)
> > > > > > >>>>>>>>>>> - ZOOKEEPER-3125 (waiting for backport PR #647)
> > > > > > >>>>>>>>>>>
> > > > > > >>>>>>>>>>> The 2 Maven related tickets are no-brainers as well
> as
> > > the
> > > > > > >>>>>> backports.
> > > > > > >>>>>>>>>> ZK-2778 has been picked up by Maoling (thanks!) as far
> > as
> > > I
> > > > > > >> can
> > > > > > >>>>> see,
> > > > > > >>>>>>>>>> ZK-1818 is the only one waiting for a volunteer.
> > > > > > >>>>>>>>>>> Please correct me if I’ve missed something.
> > > > > > >>>>>>>>>>>
> > > > > > >>>>>>>>>>> Regards,
> > > > > > >>>>>>>>>>> Andor
> > > > > > >>>>>>>>>>>
> > > > > > >>>>>>>>>>>
> > > > > > >>>>>>>>>>>
> > > > > > >>>>>>>>>>>
> > > > > > >>>>>>>>>>>> On 2018. Sep 28., at 18:32, Tamas Penzes
> > > > > > >>>>>> <tamaas@cloudera.com.INVALID
> > > > > > >>>>>>>>
> > > > > > >>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>> Hi All,
> > > > > > >>>>>>>>>>>>
> > > > > > >>>>>>>>>>>> I would add ZOOKEEPER-3021
> > > > > > >>>>>>>>>>>> <
> https://issues.apache.org/jira/browse/ZOOKEEPER-3021
> > >
> > > > > > >>> Migrate
> > > > > > >>>>>>> project
> > > > > > >>>>>>>>>>>> structure to Maven build as a blocker too. Since the
> > > > > > >>> migration
> > > > > > >>>>> has
> > > > > > >>>>>>>>>> started
> > > > > > >>>>>>>>>>>> it would be good to finish before releasing ZK 3.5.x
> > GA.
> > > > > > >>>>>>>>>>>>
> > > > > > >>>>>>>>>>>> ZOOKEEPER-925 <
> > > > > > >>>>> https://issues.apache.org/jira/browse/ZOOKEEPER-925
> > > > > > >>>>>>>
> > > > > > >>>>>>>>>> replace
> > > > > > >>>>>>>>>>>> our forrest site and documentation generation might
> > also
> > > > > > >> be a
> > > > > > >>>>> good
> > > > > > >>>>>>>>>> idea,
> > > > > > >>>>>>>>>>>> since then we could deliver the new MarkDown based
> > > > > > >>> documentation.
> > > > > > >>>>>>>>>>>>
> > > > > > >>>>>>>>>>>> Regards, Tamaas
> > > > > > >>>>>>>>>>>>
> > > > > > >>>>>>>>>>>> On Fri, Sep 14, 2018 at 10:09 AM Fangmin Lv <
> > > > > > >>> lvfangmin@gmail.com
> > > > > > >>>>>>
> > > > > > >>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>>> Oh, sorry for the confusion, I should provide more
> > > > > > >> context.
> > > > > > >>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>> Leader will use on disk txn sync with followers to
> if
> > > the
> > > > > > >>> peer
> > > > > > >>>>>> zxid
> > > > > > >>>>>>>>>> is not
> > > > > > >>>>>>>>>>>>> in it's in memory commit logs, the code is here:
> > > Leader on
> > > > > > >>> disk
> > > > > > >>>>>> txn
> > > > > > >>>>>>>>>> sync
> > > > > > >>>>>>>>>>>>> <
> > > > > > >>>>>>>>>>>>>
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>
> > > > > > >>>>>
> > > > > > >>>
> > > > > > >>
> > > > > >
> > > > >
> > >
> >
> https://github.com/apache/zookeeper/blob/master/src/java/main/org/apache/zookeeper/server/quorum/LearnerHandler.java#L774
> > > > > > >>>>>>>>>>>>>> .
> > > > > > >>>>>>>>>>>>> There is bug that potentially there will be gap in
> > the
> > > txn
> > > > > > >>>>> files,
> > > > > > >>>>>>> like
> > > > > > >>>>>>>>>>>>> after snap sync, etc, so it's possible the peer
> will
> > > miss
> > > > > > >>> txns
> > > > > > >>>>> due
> > > > > > >>>>>>> to
> > > > > > >>>>>>>>>> this.
> > > > > > >>>>>>>>>>>>> The option to disable it is snapshotSizeFactor
> > > > > > >>>>>>>>>>>>> <
> > > > > > >>>>>>>>>>>>>
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>
> > > > > > >>>>>
> > > > > > >>>
> > > > > > >>
> > > > > >
> > > > >
> > >
> >
> https://github.com/apache/zookeeper/blob/master/src/java/main/org/apache/zookeeper/server/ZKDatabase.java#L81
> > > > > > >>>>>>>>>>>>>> ,
> > > > > > >>>>>>>>>>>>> set it to -1 will disable this feature. On 3.5,
> it's
> > > > > > >> better
> > > > > > >>> to
> > > > > > >>>>>> have
> > > > > > >>>>>>> a
> > > > > > >>>>>>>>>> PR to
> > > > > > >>>>>>>>>>>>> set this to -1 by default. It might have more SNAP
> > > sync,
> > > > > > >> but
> > > > > > >>>>> from
> > > > > > >>>>>>> our
> > > > > > >>>>>>>>>> prod
> > > > > > >>>>>>>>>>>>> it doesn't seem to be a big problem to me.
> > > > > > >>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>> I can send out the diff to disable it by default on
> > > 3.5 if
> > > > > > >>> you
> > > > > > >>>>>> guys
> > > > > > >>>>>>>>>> think
> > > > > > >>>>>>>>>>>>> this is the right way to do.
> > > > > > >>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>> Thanks,
> > > > > > >>>>>>>>>>>>> Fangmin
> > > > > > >>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>> On Thu, Sep 13, 2018 at 1:58 AM Andor Molnar <
> > > > > > >>> andor@apache.org>
> > > > > > >>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>>>> What’s needed to turn it off?
> > > > > > >>>>>>>>>>>>>> Do we need a PR or it’s just a config option?
> > > > > > >>>>>>>>>>>>>> Shall we implement a feature switch for that and
> > turn
> > > it
> > > > > > >>> off by
> > > > > > >>>>>>>>>> default?
> > > > > > >>>>>>>>>>>>>> Sorry I don’t have too much insight on disk txn
> > sync.
> > > > > > >>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>> Andor
> > > > > > >>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>> On 2018. Sep 13., at 9:16, Fangmin Lv <
> > > > > > >>> lvfangmin@gmail.com>
> > > > > > >>>>>>> wrote:
> > > > > > >>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>> And to be clear, ZOOKEEPER-2418 is actually just
> > one
> > > > > > >> case
> > > > > > >>> of
> > > > > > >>>>>>>>>>>>>> inconsistency
> > > > > > >>>>>>>>>>>>>>> which could caused by on disk txn sync, as I
> > > mentioned
> > > > > > >> in
> > > > > > >>> a
> > > > > > >>>>>> newer
> > > > > > >>>>>>>>>> JIRA
> > > > > > >>>>>>>>>>>>>>> ZOOKEEPER-2846 <
> > > > > > >>>>>>>>>> https://issues.apache.org/jira/browse/ZOOKEEPER-2846
> >,
> > > > > > >>>>>>>>>>>>>> the
> > > > > > >>>>>>>>>>>>>>> snap sync or txn sync could also leave txns gap
> in
> > > the
> > > > > > >> txn
> > > > > > >>>>> file,
> > > > > > >>>>>>>>>> which
> > > > > > >>>>>>>>>>>>>> is a
> > > > > > >>>>>>>>>>>>>>> more common case could trigger this issue.
> > > > > > >>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>> I would suggest to turn off the on disk txn sync
> by
> > > > > > >>> default
> > > > > > >>>>> for
> > > > > > >>>>>>> now
> > > > > > >>>>>>>>>> to
> > > > > > >>>>>>>>>>>>>>> avoid this issue, after we finished
> ZOOKEEPER-3114,
> > > we
> > > > > > >>> can use
> > > > > > >>>>>>> that
> > > > > > >>>>>>>>>> to
> > > > > > >>>>>>>>>>>>>>> validate the on disk txns during syncing.
> > > > > > >>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>> Thanks,
> > > > > > >>>>>>>>>>>>>>> Fangmin
> > > > > > >>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>> On Wed, Sep 12, 2018 at 9:55 AM Fangmin Lv <
> > > > > > >>>>> lvfangmin@gmail.com
> > > > > > >>>>>>>
> > > > > > >>>>>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>>>>>> Andor,
> > > > > > >>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>> ZOOKEEPER-3114 is about adding real time digest
> > > > > > >> checking
> > > > > > >>> to
> > > > > > >>>>>> help
> > > > > > >>>>>>>>>>>>>> detecting
> > > > > > >>>>>>>>>>>>>>>> inconsistency, it's a new feature with amounts
> of
> > > code
> > > > > > >>>>> change.
> > > > > > >>>>>>> I'll
> > > > > > >>>>>>>>>>>>>> start
> > > > > > >>>>>>>>>>>>>>>> upstream it part by part, but I don't expect
> it's
> > > being
> > > > > > >>>>> merged
> > > > > > >>>>>> in
> > > > > > >>>>>>>>>> the
> > > > > > >>>>>>>>>>>>>> next
> > > > > > >>>>>>>>>>>>>>>> few weeks. So yes, it's a nice to have, but
> > > definitely
> > > > > > >>> not a
> > > > > > >>>>>>> block
> > > > > > >>>>>>>>>> for
> > > > > > >>>>>>>>>>>>>> 3.5.
> > > > > > >>>>>>>>>>>>>>>> Thanks,
> > > > > > >>>>>>>>>>>>>>>> Fangmin
> > > > > > >>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>> On Wed, Sep 12, 2018 at 2:55 AM Andor Molnar <
> > > > > > >>>>> andor@apache.org
> > > > > > >>>>>>>
> > > > > > >>>>>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>>>>>>> Fangmin,
> > > > > > >>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>> Sorry, I just noticed that you want to include
> > the
> > > > > > >>>>> consistency
> > > > > > >>>>>>>>>> fixes
> > > > > > >>>>>>>>>>>>> in
> > > > > > >>>>>>>>>>>>>>>>> the stable version which is fine. Let’s finish
> > the
> > > > > > >>> backports
> > > > > > >>>>>> and
> > > > > > >>>>>>>>>>>>> we’ll
> > > > > > >>>>>>>>>>>>>> be
> > > > > > >>>>>>>>>>>>>>>>> done with them.
> > > > > > >>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>> ZOOKEEPER-3114 is essentially a new feature, I
> > > > > > >> wouldn’t
> > > > > > >>>>> block
> > > > > > >>>>>>> 3.5
> > > > > > >>>>>>>>>>>>> with
> > > > > > >>>>>>>>>>>>>>>>> that. What do you think?
> > > > > > >>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>> Andor
> > > > > > >>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>> On 2018. Sep 12., at 11:52, Andor Molnar <
> > > > > > >>> andor@apache.org
> > > > > > >>>>>>
> > > > > > >>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>>>>>>>> Cool, thanks for the clarification.
> > > > > > >>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>> The updated list is as follows:
> > > > > > >>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>> - ZOOKEEPER-236 (SSL/TLS support for Atomic
> > > Broadcast
> > > > > > >>>>>> protocol)
> > > > > > >>>>>>>>>>>>>>>>>> - ZOOKEEPER-1818 (Fix don't care for trunk)
> > > > > > >>>>>>>>>>>>>>>>>> - ZOOKEEPER-2778 (Potential server deadlock
> > > between
> > > > > > >>>>> follower
> > > > > > >>>>>>> sync
> > > > > > >>>>>>>>>>>>> with
> > > > > > >>>>>>>>>>>>>>>>> leader and follower receiving external
> connection
> > > > > > >>> requests.)
> > > > > > >>>>>>>>>>>>>>>>>> The following are not critical and no blockers
> > for
> > > > > > >> the
> > > > > > >>>>> stable
> > > > > > >>>>>>>>>>>>> release:
> > > > > > >>>>>>>>>>>>>>>>>> Waiting for to be ported to 3.5:
> > > > > > >>>>>>>>>>>>>>>>>> - ZOOKEEPER-3104
> > > > > > >>>>>>>>>>>>>>>>>> - ZOOKEEPER-3125
> > > > > > >>>>>>>>>>>>>>>>>> - ZOOKEEPER-3127
> > > > > > >>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>> New feature:
> > > > > > >>>>>>>>>>>>>>>>>> - ZOOKEEPER-3114 (fixes ZOOKEEPER-2184 too)
> > > > > > >>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>> Regards,
> > > > > > >>>>>>>>>>>>>>>>>> Andor
> > > > > > >>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>> On 2018. Sep 12., at 0:42, Fangmin Lv <
> > > > > > >>>>> lvfangmin@gmail.com>
> > > > > > >>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>>>>>>>>> Hi Andor,
> > > > > > >>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>> That's the on disk txn feature, which was
> > > disabled
> > > > > > >>>>>> internally
> > > > > > >>>>>>>>>> after
> > > > > > >>>>>>>>>>>>>> we
> > > > > > >>>>>>>>>>>>>>>>>>> found the potentially inconsistent issue. The
> > > only
> > > > > > >>>>> solution
> > > > > > >>>>>> we
> > > > > > >>>>>>>>>> have
> > > > > > >>>>>>>>>>>>>>>>> for now
> > > > > > >>>>>>>>>>>>>>>>>>> is waiting for the new digest checking
> feature
> > I
> > > > > > >>> mentioned
> > > > > > >>>>>> in
> > > > > > >>>>>>>>>>>>>>>>>>> ZOOKEEPER-3114.
> > > > > > >>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>> I think there are some other critical
> > consistent
> > > > > > >>> issues we
> > > > > > >>>>>>> just
> > > > > > >>>>>>>>>>>>> fixed
> > > > > > >>>>>>>>>>>>>>>>> on
> > > > > > >>>>>>>>>>>>>>>>>>> master recently: ZOOKEEPER-3104,
> > ZOOKEEPER-3125,
> > > > > > >>>>>>>>>> ZOOKEEPER-3127, I
> > > > > > >>>>>>>>>>>>>>>>> think we
> > > > > > >>>>>>>>>>>>>>>>>>> should include that in the official 3.5
> release
> > > as
> > > > > > >>> well.
> > > > > > >>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>> Thanks,
> > > > > > >>>>>>>>>>>>>>>>>>> Fangmin
> > > > > > >>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>> On Tue, Sep 11, 2018 at 11:58 AM Andor
> Molnár <
> > > > > > >>>>>>> andor@apache.org
> > > > > > >>>>>>>>>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>>>>>>>>>> Hi Jeelani,
> > > > > > >>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>> Thanks for letting me know. I'm happy to
> > remove
> > > it
> > > > > > >>> from
> > > > > > >>>>> the
> > > > > > >>>>>>>>>> list
> > > > > > >>>>>>>>>>>>> to
> > > > > > >>>>>>>>>>>>>>>>> get
> > > > > > >>>>>>>>>>>>>>>>>>>> closer to a stable release. :)
> > > > > > >>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>> What's the feature which can be disabled to
> > > avoid
> > > > > > >>> data
> > > > > > >>>>>>>>>>>>>> inconsistency?
> > > > > > >>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>> Andor
> > > > > > >>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>> On 09/10/2018 11:33 PM, Mohamed Jeelani
> wrote:
> > > > > > >>>>>>>>>>>>>>>>>>>>> Thanks Andor for compiling this. Should we
> be
> > > > > > >>> ignoring
> > > > > > >>>>>>>>>>>>>>>>> ZOOKEEPER-2418 as
> > > > > > >>>>>>>>>>>>>>>>>>>> well? This exists in 3.4 as well and the
> > feature
> > > > > > >> can
> > > > > > >>> be
> > > > > > >>>>>>>>>> disabled.
> > > > > > >>>>>>>>>>>>> We
> > > > > > >>>>>>>>>>>>>>>>> are
> > > > > > >>>>>>>>>>>>>>>>>>>> working on a longer term fix for it in 3.6.
> > > > > > >>>>>>>>>>>>>>>>>>>>> Regards,
> > > > > > >>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>> Jeelani
> > > > > > >>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>> On 9/10/18, 5:19 AM, "Andor Molnar"
> > > > > > >>>>>>>>>> <andor@cloudera.com.INVALID
> > > > > > >>>>>>>>>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>>>>>>>>>>> Fine.
> > > > > > >>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>> I'm happy to ignore 1549, 2846 and 2930.
> > Still
> > > we
> > > > > > >>> have
> > > > > > >>>>> the
> > > > > > >>>>>>>>>> list
> > > > > > >>>>>>>>>>>>>> of:
> > > > > > >>>>>>>>>>>>>>>>>>>>> - ZOOKEEPER-236 (SSL/TLS support for Atomic
> > > > > > >>> Broadcast
> > > > > > >>>>>>>>>> protocol)
> > > > > > >>>>>>>>>>>>>>>>>>>>> - ZOOKEEPER-1818 (Fix don't care for trunk)
> > > > > > >>>>>>>>>>>>>>>>>>>>> - ZOOKEEPER-2418 (txnlog diff sync can skip
> > > > > > >> sending
> > > > > > >>> some
> > > > > > >>>>>>>>>>>>>>>>>>>> transactions to
> > > > > > >>>>>>>>>>>>>>>>>>>>> followers)
> > > > > > >>>>>>>>>>>>>>>>>>>>> - ZOOKEEPER-2778 (Potential server deadlock
> > > > > > >> between
> > > > > > >>>>>> follower
> > > > > > >>>>>>>>>>>>> sync
> > > > > > >>>>>>>>>>>>>>>>>>>> with
> > > > > > >>>>>>>>>>>>>>>>>>>>> leader and follower receiving external
> > > connection
> > > > > > >>>>>> requests.)
> > > > > > >>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>> SSL (ZK-236) is a feature which essential
> for
> > > the
> > > > > > >>> 3.5
> > > > > > >>>>>>> release,
> > > > > > >>>>>>>>>>>>>>>>> hence
> > > > > > >>>>>>>>>>>>>>>>>>>> I
> > > > > > >>>>>>>>>>>>>>>>>>>>> wouldn't leave it out or postpone it for
> the
> > > next
> > > > > > >>> stable
> > > > > > >>>>>>>>>>>>> release.
> > > > > > >>>>>>>>>>>>>>>>> PR
> > > > > > >>>>>>>>>>>>>>>>>>>> has
> > > > > > >>>>>>>>>>>>>>>>>>>>> been out for a long time, get on reviewing
> > > please.
> > > > > > >>>>>>>>>>>>>>>>>>>>> The rest are also long outstanding issues
> > which
> > > > > > >> have
> > > > > > >>>>> been
> > > > > > >>>>>>>>>> found
> > > > > > >>>>>>>>>>>>> in
> > > > > > >>>>>>>>>>>>>>>>>>>> the 3.5
> > > > > > >>>>>>>>>>>>>>>>>>>>> branch.
> > > > > > >>>>>>>>>>>>>>>>>>>>> ZK-1818 is something which was found in 3.4
> > and
> > > > > > >>> fixed in
> > > > > > >>>>>>> 3.4,
> > > > > > >>>>>>>>>>>>> but
> > > > > > >>>>>>>>>>>>>>>>>>>> never has
> > > > > > >>>>>>>>>>>>>>>>>>>>> been fixed in 3.5. Quite a serious issue if
> > > still
> > > > > > >>>>> present.
> > > > > > >>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>> I think we should at least run some manual
> > > testing
> > > > > > >>> and
> > > > > > >>>>> see
> > > > > > >>>>>>> if
> > > > > > >>>>>>>>>> we
> > > > > > >>>>>>>>>>>>>>>>>>>> could
> > > > > > >>>>>>>>>>>>>>>>>>>>> repro any of these issues before going
> ahead
> > > with
> > > > > > >> a
> > > > > > >>>>> stable
> > > > > > >>>>>>>>>>>>>> release.
> > > > > > >>>>>>>>>>>>>>>>>>>>> Regards,
> > > > > > >>>>>>>>>>>>>>>>>>>>> Andor
> > > > > > >>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>> On Fri, Sep 7, 2018 at 3:24 AM, Michael
> Han <
> > > > > > >>>>>>> hanm@apache.org>
> > > > > > >>>>>>>>>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>>>>>>>>>>>> I haven't went through the entire list,
> but
> > > looks
> > > > > > >>> like
> > > > > > >>>>>> lots
> > > > > > >>>>>>>>>> of
> > > > > > >>>>>>>>>>>>> the
> > > > > > >>>>>>>>>>>>>>>>>>>> JIRA
> > > > > > >>>>>>>>>>>>>>>>>>>>>> issues listed in this thread, such as
> > > > > > >>> ZOOKEEPER-1549,
> > > > > > >>>>>> 2846,
> > > > > > >>>>>>>>>> also
> > > > > > >>>>>>>>>>>>>>>>>>>> affects
> > > > > > >>>>>>>>>>>>>>>>>>>>>> 3.4 releases. Should we scope these issues
> > > out?
> > > > > > >>>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>> I think historically the single
> outstanding
> > > > > > >>> blocking
> > > > > > >>>>>> issue
> > > > > > >>>>>>>>>> for a
> > > > > > >>>>>>>>>>>>>>>>>>>> stable 3.5
> > > > > > >>>>>>>>>>>>>>>>>>>>>> release is the reconfig feature and
> security
> > > > > > >>> concerns
> > > > > > >>>>>>> around
> > > > > > >>>>>>>>>> it
> > > > > > >>>>>>>>>>>>>>>>>>>> (somehow
> > > > > > >>>>>>>>>>>>>>>>>>>>>> addressed in ZOOKEEPER-2014), and the
> alpha
> > > and
> > > > > > >>> beta
> > > > > > >>>>>>> releases
> > > > > > >>>>>>>>>>>>> were
> > > > > > >>>>>>>>>>>>>>>>>>>> created
> > > > > > >>>>>>>>>>>>>>>>>>>>>> to stabilize that feature.
> > > > > > >>>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>
> > > > > > >>>>>
> > > > > > >>>
> > > > > > >>
> > > > > >
> > > > >
> > >
> >
> https://urldefense.proofpoint.com/v2/url?u=http-3A__zookeeper-2Duser.578899.n2.nabble.com_Zookeeper-2Dwith-2D&d=DwIBaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=Vl4oKanLQehvaulUvoKg8A&m=wqlhnot9c-pQLdkGkccSGNpELUNUnB-wy_h0iA3PRqI&s=_tGtL3nMWtuPrXKXDx27AIWOzyyT7W-CjIVLDFZwT0E&e=
> > > > > > >>>>>>>>>>>>>>>>>>>>>> SSL-release-date-tt7581744.html
> > > > > > >>>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>> So it looks like we are in good shape to
> > > release.
> > > > > > >>>>>> Something
> > > > > > >>>>>>>>>>>>> might
> > > > > > >>>>>>>>>>>>>>>>>>>> worth
> > > > > > >>>>>>>>>>>>>>>>>>>>>> doing to claim the quality of 3.5 is on
> par
> > > with
> > > > > > >>> 3.4
> > > > > > >>>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>> * Run Jepsen on 3.5 - 3.4 passed the test
> > for
> > > the
> > > > > > >>>>> record
> > > > > > >>>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>
> > > > > > >>>>>
> > > > > > >>>
> > > > > > >>
> > > > > >
> > > > >
> > >
> >
> https://urldefense.proofpoint.com/v2/url?u=https-3A__aphyr.com_posts_291-2Djepsen-2Dzookeeper&d=DwIBaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=Vl4oKanLQehvaulUvoKg8A&m=wqlhnot9c-pQLdkGkccSGNpELUNUnB-wy_h0iA3PRqI&s=VjORkX5s7hrJyl8mW9Q4cfeSWF4qfTdyRjcuAiBt0y4&e=
> > > > > > >>>>>>>>>>>>>>>>>>>>>> * Fix all flaky tests on 3.5 - 3.4 has
> > little
> > > or
> > > > > > >> no
> > > > > > >>>>> flaky
> > > > > > >>>>>>>>>> tests
> > > > > > >>>>>>>>>>>>> at
> > > > > > >>>>>>>>>>>>>>>>>>>> all.
> > > > > > >>>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>> On Tue, Sep 4, 2018 at 1:48 AM, Andor
> Molnar
> > > > > > >>>>>>>>>>>>>>>>>>>> <andor@cloudera.com.invalid>
> > > > > > >>>>>>>>>>>>>>>>>>>>>> wrote:
> > > > > > >>>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>>> Thanks Maoling! That would be huge help,
> I
> > > > > > >>> appreciate
> > > > > > >>>>>> it.
> > > > > > >>>>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>>> Andor
> > > > > > >>>>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>>>>>
> > > > > > >>>>>>>>>>
> > > > > > >>>>>>>
> > > > > > >>>>>>
> > > > > > >>>>>
> > > > > > >>>
> > > > > > >>
> > > > > >
> > > > > > --
> > > > >
> > > > >
> > > > > -- Enrico Olivelli
> > > > >
> > >
> > --
> >
> >
> > -- Enrico Olivelli
> >
>
-- 


-- Enrico Olivelli

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