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From Manohar Sripada <manohar...@gmail.com>
Subject Re: Index BackUp using JDK 8 & Restore using JDK 7. Does this work?
Date Mon, 18 Apr 2016 16:02:10 GMT
Thanks Shawn! :-)

On Mon, Apr 18, 2016 at 6:42 PM, Shawn Heisey <apache@elyograg.org> wrote:

> On 4/18/2016 12:49 AM, Manohar Sripada wrote:
> > We are using Solr 5.2.1 and JDK 7. We do create a static index in one
> > cluster (solr cluster 1) and ship that index to another cluster (Solr
> > cluster 2).  Solr Cluster 2 is the one where queries will be fired.
> >
> > Due to some unavoidable reasons, we want to upgrade Solr Cluster 1 to JDK
> > 8. But, we can't upgrade Solr cluster 2 to JDK 8 in near future. Does the
> > backed up index from Solr cluster 1 which uses JDK 8 works when restored
> in
> > Solr cluster 2 which uses JDK 7?
>
> The Lucene index format (Solr is a Lucene application) is the same
> regardless of Java version or hardware platform.  Some programs (rrdtool
> being the prominent example) have a different file format on 32-bit CPUs
> compared to 64-bit CPUs ... but Lucene/Solr is not one of those programs.
>
> Some info you might already know: Solr 4.8.x through 5.5.x require Java
> 7.  Solr 6.0.0 requires Java 8.
>
> Thanks,
> Shawn
>
>

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