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Posted to solr-user@lucene.apache.org by Andy C <an...@gmail.com> on 2018/05/09 19:51:22 UTC
Upgrading to Solr 7.3 but Zookeeper 3.4.11 no longer available on
Zookeeper mirror sites
According to the 7.3 release notes I should be using Zookeeper 3.4.11 with
Solr 7.3.
However it appears that Zookeeper has pulled Zookeeper 3.4.11 from their
mirror sites (this appears to be due to a serious bug in ZK 3.4.11 -
ZOOKEEPER-2960) <https://issues.apache.org/jira/browse/ZOOKEEPER-2960> .
Only 3.4.10 and 3.4.12 are available.
Not quite sure how to proceed. Can I use ZK 3.4.10 or 3.4.12 with Solr 7.3?
Or should I try to find an archived version of ZK 3.4.11 somewhere?
Will Solr 7.3.1 or 7.4 be integrated with ZK 3.4.12? If so, what is the
expected time frame for these releases?
Would appreciate any guidance.
Thanks,
- Andy -
Re: Upgrading to Solr 7.3 but Zookeeper 3.4.11 no longer available on
Zookeeper mirror sites
Posted by Shawn Heisey <ap...@elyograg.org>.
On 5/9/2018 1:51 PM, Andy C wrote:
> According to the 7.3 release notes I should be using Zookeeper 3.4.11 with
> Solr 7.3.
The release notes don't make any specific recommendation about the
version of ZK that you should use for your server. The information in
the release notes that mentions 3.4.11 is only talking about which
version of ZK is included inside Solr. Typically you should use the
latest stable release for your servers, or possibly the latest release
in the same minor version as the client.
> However it appears that Zookeeper has pulled Zookeeper 3.4.11 from their
> mirror sites (this appears to be due to a serious bug in ZK 3.4.11 -
> ZOOKEEPER-2960) <https://issues.apache.org/jira/browse/ZOOKEEPER-2960> .
> Only 3.4.10 and 3.4.12 are available.
>
> Not quite sure how to proceed. Can I use ZK 3.4.10 or 3.4.12 with Solr 7.3?
> Or should I try to find an archived version of ZK 3.4.11 somewhere?
Use 3.4.12. And if a newer 3.4.x version gets released, consider
upgrading your ZK servers. All 3.4.x clients SHOULD work with all 3.4.x
versions of the server, and would probably also work with 3.5.x servers
(which are alpha and beta at this time, not stable).
You can still download 3.4.11 if you REALLY want to, from the Apache
archive:
https://archive.apache.org/dist/zookeeper/
7.3.1 is still using ZK 3.4.11. At this time, ZK isn't upgraded in the
stable branch that will eventually be 7.4. That might happen before 7.4
is released, but I can't be sure.
The only time the bug in 3.4.11 would matter for Solr itself is when
using the embedded zookeeper -- which we do NOT recommend using in
production. The incorrect directories should not actually cause any
problem for the embedded ZK unless an upgrade is attempted while keeping
the same ZK data. The files would need to be moved or the embedded ZK
reconfigured before a newer version could successfully find them.
Thanks,
Shawn
Re: Upgrading to Solr 7.3 but Zookeeper 3.4.11 no longer available on
Zookeeper mirror sites
Posted by Erick Erickson <er...@gmail.com>.
Nope, we just moved to 3.4.11 recently. Raise a JIRA?
On Wed, May 9, 2018 at 1:38 PM, Andy C <an...@gmail.com> wrote:
> Thank Erick.
>
> Was not quite sure from reading the JIRA why the Zookeeper team felt the
> issue was so critical that they felt the need to pull the release from
> their mirrors.
>
> I guess the biggest issue is if you started out with a single ZK instance
> and then implemented a ZK cluster that it would invert the dataDir and
> dataLogDir directories.
>
> It does present something of a PR issue for us, if we tell our customers to
> use a ZK version that has been pulled from the mirrors. Any plans to move
> to ZK 3.4.12 in future releases?
>
> Thanks,
> - Andy -
>
> On Wed, May 9, 2018 at 4:09 PM, Erick Erickson <er...@gmail.com>
> wrote:
>
>> That bug isn't all that critical, at worst you may have to invert
>> where your two directories point.
>>
>> 3.4.11 is available from https://archive.apache.org/dist/zookeeper/
>>
>> Best,
>> Erick
>>
>> On Wed, May 9, 2018 at 12:51 PM, Andy C <an...@gmail.com> wrote:
>> > According to the 7.3 release notes I should be using Zookeeper 3.4.11
>> with
>> > Solr 7.3.
>> >
>> > However it appears that Zookeeper has pulled Zookeeper 3.4.11 from their
>> > mirror sites (this appears to be due to a serious bug in ZK 3.4.11 -
>> > ZOOKEEPER-2960) <https://issues.apache.org/jira/browse/ZOOKEEPER-2960> .
>> > Only 3.4.10 and 3.4.12 are available.
>> >
>> > Not quite sure how to proceed. Can I use ZK 3.4.10 or 3.4.12 with Solr
>> 7.3?
>> > Or should I try to find an archived version of ZK 3.4.11 somewhere?
>> >
>> > Will Solr 7.3.1 or 7.4 be integrated with ZK 3.4.12? If so, what is the
>> > expected time frame for these releases?
>> >
>> > Would appreciate any guidance.
>> >
>> > Thanks,
>> > - Andy -
>>
Re: Upgrading to Solr 7.3 but Zookeeper 3.4.11 no longer available on
Zookeeper mirror sites
Posted by Andy C <an...@gmail.com>.
Thanks Shawn. That makes sense.
On Wed, May 9, 2018 at 5:10 PM, Shawn Heisey <ap...@elyograg.org> wrote:
> On 5/9/2018 2:38 PM, Andy C wrote:
> > Was not quite sure from reading the JIRA why the Zookeeper team felt the
> > issue was so critical that they felt the need to pull the release from
> > their mirrors.
>
> If somebody upgrades their servers from an earlier 3.4.x release to
> 3.4.11, then 3.4.11 might be unable to properly read the existing data
> because it'll be looking in the wrong place. Worst-case scenario could
> result in all data in a ZK ensemble disappearing, and the admin might
> have no idea why it all disappeared. (the data would probably still be
> recoverable from the disk)
>
> That's why it was pulled.
>
> > It does present something of a PR issue for us, if we tell our customers
> to
> > use a ZK version that has been pulled from the mirrors. Any plans to move
> > to ZK 3.4.12 in future releases?
>
> There should be no issues with running 3.4.12 servers with the 3.4.11
> client in Solr. Other version combinations are likely to work as well,
> though there are typically a lot of bugfixes included in later ZK
> releases, so running the latest stable release is recommended.
>
> The ZOOKEEPER-2960 problem is ONLY on the server side. As I mentioned
> before, the ZK version information in the release notes is not a
> recommendation, it serves to inform users what version of ZK is included
> in Solr.
>
> Thanks,
> Shawn
>
>
Re: Upgrading to Solr 7.3 but Zookeeper 3.4.11 no longer available on
Zookeeper mirror sites
Posted by Shawn Heisey <ap...@elyograg.org>.
On 5/9/2018 2:38 PM, Andy C wrote:
> Was not quite sure from reading the JIRA why the Zookeeper team felt the
> issue was so critical that they felt the need to pull the release from
> their mirrors.
If somebody upgrades their servers from an earlier 3.4.x release to
3.4.11, then 3.4.11 might be unable to properly read the existing data
because it'll be looking in the wrong place. Worst-case scenario could
result in all data in a ZK ensemble disappearing, and the admin might
have no idea why it all disappeared. (the data would probably still be
recoverable from the disk)
That's why it was pulled.
> It does present something of a PR issue for us, if we tell our customers to
> use a ZK version that has been pulled from the mirrors. Any plans to move
> to ZK 3.4.12 in future releases?
There should be no issues with running 3.4.12 servers with the 3.4.11
client in Solr. Other version combinations are likely to work as well,
though there are typically a lot of bugfixes included in later ZK
releases, so running the latest stable release is recommended.
The ZOOKEEPER-2960 problem is ONLY on the server side. As I mentioned
before, the ZK version information in the release notes is not a
recommendation, it serves to inform users what version of ZK is included
in Solr.
Thanks,
Shawn
Re: Upgrading to Solr 7.3 but Zookeeper 3.4.11 no longer available on
Zookeeper mirror sites
Posted by Andy C <an...@gmail.com>.
Thank Erick.
Was not quite sure from reading the JIRA why the Zookeeper team felt the
issue was so critical that they felt the need to pull the release from
their mirrors.
I guess the biggest issue is if you started out with a single ZK instance
and then implemented a ZK cluster that it would invert the dataDir and
dataLogDir directories.
It does present something of a PR issue for us, if we tell our customers to
use a ZK version that has been pulled from the mirrors. Any plans to move
to ZK 3.4.12 in future releases?
Thanks,
- Andy -
On Wed, May 9, 2018 at 4:09 PM, Erick Erickson <er...@gmail.com>
wrote:
> That bug isn't all that critical, at worst you may have to invert
> where your two directories point.
>
> 3.4.11 is available from https://archive.apache.org/dist/zookeeper/
>
> Best,
> Erick
>
> On Wed, May 9, 2018 at 12:51 PM, Andy C <an...@gmail.com> wrote:
> > According to the 7.3 release notes I should be using Zookeeper 3.4.11
> with
> > Solr 7.3.
> >
> > However it appears that Zookeeper has pulled Zookeeper 3.4.11 from their
> > mirror sites (this appears to be due to a serious bug in ZK 3.4.11 -
> > ZOOKEEPER-2960) <https://issues.apache.org/jira/browse/ZOOKEEPER-2960> .
> > Only 3.4.10 and 3.4.12 are available.
> >
> > Not quite sure how to proceed. Can I use ZK 3.4.10 or 3.4.12 with Solr
> 7.3?
> > Or should I try to find an archived version of ZK 3.4.11 somewhere?
> >
> > Will Solr 7.3.1 or 7.4 be integrated with ZK 3.4.12? If so, what is the
> > expected time frame for these releases?
> >
> > Would appreciate any guidance.
> >
> > Thanks,
> > - Andy -
>
Re: Upgrading to Solr 7.3 but Zookeeper 3.4.11 no longer available on
Zookeeper mirror sites
Posted by Erick Erickson <er...@gmail.com>.
That bug isn't all that critical, at worst you may have to invert
where your two directories point.
3.4.11 is available from https://archive.apache.org/dist/zookeeper/
Best,
Erick
On Wed, May 9, 2018 at 12:51 PM, Andy C <an...@gmail.com> wrote:
> According to the 7.3 release notes I should be using Zookeeper 3.4.11 with
> Solr 7.3.
>
> However it appears that Zookeeper has pulled Zookeeper 3.4.11 from their
> mirror sites (this appears to be due to a serious bug in ZK 3.4.11 -
> ZOOKEEPER-2960) <https://issues.apache.org/jira/browse/ZOOKEEPER-2960> .
> Only 3.4.10 and 3.4.12 are available.
>
> Not quite sure how to proceed. Can I use ZK 3.4.10 or 3.4.12 with Solr 7.3?
> Or should I try to find an archived version of ZK 3.4.11 somewhere?
>
> Will Solr 7.3.1 or 7.4 be integrated with ZK 3.4.12? If so, what is the
> expected time frame for these releases?
>
> Would appreciate any guidance.
>
> Thanks,
> - Andy -