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From Shawn Heisey <>
Subject Re: AW: CoreContainer#createAndLoad, existing cores not loaded
Date Thu, 29 Jan 2015 17:10:12 GMT
On 1/29/2015 12:13 AM, Clemens Wyss DEV wrote:
> BTW:
> None of my core folders contains a file ... ? Could it be due to the
fact that I am (so far) running only EmbeddedSolrServer, hence no real Solr-Server?

I'm not sure how it's working without files, unless your
solr.xml file has a <cores> element and the cores are defined there.
The old-style solr.xml file works in 4.10.3.

The minimum config you need in a file is nothing at all
-- it just needs to exist.  The name of the core defaults to the name of
the directory where it is found, and the dataDir defaults to "data"
relative to the directory where the was found.  I myself
only have "name" and "dataDir" defined in my files,
because I need both to be different from the default.

[root@bigindy5 cores]# cat s0_0/
#Written by CorePropertiesLocator
#Mon Jan 26 23:38:42 MST 2015

[root@bigindy5 cores]# cat s0_1/
#Written by CorePropertiesLocator
#Mon Jan 26 23:38:42 MST 2015

To answer your other question about whether you should go with 5.0 ...
that depends on how close you are to your production deployment and how
willing you are to deal with bleeding edge software.  The first release
of a new major version is always a risky proposition ... I plan to wait
for the 5.2 or 5.3 release before rolling it into production, and
waiting long enough after the release to make sure that no big problems
are reported by users.  Minor Lucene/Solr releases happen on a very
quick timeline, so I won't have to wait very long.

The following info is available on the dev list, so I'm not giving away
any secrets when I tell you that the first release candidate for 5.0 has
failed to pass the vote.  There will be a new one soon that includes
some additional bugfixes.  If all goes well with that candidate, there
should be a release announcement within a week of the new RC being cut.


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