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
