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https://issues.apache.org/jira/browse/CONNECTORS-1238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15470334#comment-15470334
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Karl Wright commented on CONNECTORS-1238:
-----------------------------------------

Hi Abe-san,

Zookeeper version in build.xml on trunk is:

{code}
    <property name="zookeeper.version" value="3.4.8"/>
{code}

Zookeeper is pretty good about backwards compatibility so I think it is ok to 
be ahead of Solrj for this.

Also, if you want to attempt to upgrade to solrj 6.x, please by all means go 
ahead.  We override several Solrj classes, though, in order to fix problems in 
SolrJ code.  Some of these overrides will probably need to remain while others 
we can perhaps remove.  So I think some careful testing is going to be needed.

> Update MCF's lucene/solr connector to use the most recent solr jar etc.
> -----------------------------------------------------------------------
>
>                 Key: CONNECTORS-1238
>                 URL: https://issues.apache.org/jira/browse/CONNECTORS-1238
>             Project: ManifoldCF
>          Issue Type: Task
>          Components: Build, Lucene/SOLR connector
>    Affects Versions: ManifoldCF 2.3
>            Reporter: Karl Wright
>            Assignee: Karl Wright
>             Fix For: ManifoldCF 2.6
>
>
> Solr is up to revision 5.3, and 5.3.1 is also imminent.  We should bring MCF 
> up to date, especially since there's now a new "security module" which 
> provides authentication of various kinds.
> It's possible that this will also require updates to httpclient.  Some effort 
> has been made to make Kerberos be more usable in the client, although I don't 
> know where that effort stands.  It may not be available even yet.  In general 
> we try to upgrade to whatever version Solr is happy with, since Solr is so 
> dependent on precise versions of httpclient.
> [~alessandro.benedetti]], perhaps you might have some experience with this?



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