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From Erick Erickson <>
Subject Re: Solr upgrade to latest version
Date Mon, 22 Sep 2014 19:49:01 GMT
Probably go for 4.9.1. There'll be a 4.10.1 out in the not-too-distant
future that you can upgrade to if you wish. 4.9.1 -> 4.10.1 should be
quite painless.

But do _not_ copy your schema.xml and solrconfig.xml files over form
1.4 to 4.x. There are some fairly easy ways to shoot yourself in the
foot there. Take the stock distribution configuration files and copy
_parts_ of your schema.xml and solrconfig.xml you care about.

If you're using multiple cores, read about core discovery here:

And be very aware that you should _not_ remove any of the _field_
entries in schema.xml. In particular _version_ and _root_ should be
left alone. As well as the "id" field.

And you'll have to re-index everything; Solr 4.x will not read Solr
1.4 indexes. If that's impossible, you'll have to upgrade from 1.4 to
3.x, optimize your index, then upgrade from 3.x to 4.x, add some
documents, and optimize/force_merge again.


On Mon, Sep 22, 2014 at 2:29 AM, Danesh Kuruppu <> wrote:
> Hi all,
> I currently working on upgrade sorl 1.4.1 to sorl latest stable release.
> What is the latest stable release I can use?
> Is there specfic things I need to look at when upgrade.
> Need help
> Thanks
> Danesh

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