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From Rafał Kuć <>
Subject Re: Error: _version_field must exist in schema
Date Wed, 17 Oct 2012 22:25:08 GMT

You can some find information about requirements of SolrCloud at . I don't know if _version_ is
mentioned elsewhere.

As for Websolr - I'm afraid I can't say anything about the cause of
those errors without seeing the exception. 

 Rafał Kuć
 Sematext :: :: Solr - Lucene - Nutch - ElasticSearch

> On Thu, Oct 18, 2012 at 12:09 AM, Rafał Kuć <> wrote:
>> Hello!
>> The _version_ field is needed by some of Solr 4.0 functionality like
>> transaction log or partial documents update. If you want to use them,
>> just update your schema.xml and put the _version_ field definition
>> there.
>> However if you don't want those, you can remove the transaction log
>> configuration in your solrconfig.xml. However please remember that
>> when using SolrCloud you'll need that field.

> Thanks. Where is that bit documented? I don't see it on the Solr wiki:

> I do have a Solr 4 Beta index running on Websolr that does not have
> such a field. It works, but throws many "Service Unavailable" and
> "Communication Error" errors. Might the lack of the _version_ field be
> the reason?

> Thanks.

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