Lucene has never promised that it will work correctly over _two_ major
versions. IndexUpgraderTool simply optimizes into a single segment, which has
it’s own problems
(https://lucidworks.com/post/segment-merging-deleted-documents-optimize-may-bad/).
It does _not_ transform the index to look lik
Hi All,
Since 2015 we are using Solr cloud for search. We are using Solr 5.2.1 now we
want to upgrade Solr 5.2.1 to Solr 7.7.2. Along with Solr we are using
Zookeeper 3.4.6 and wanted to upgrade it to Zookeeper 3.4.10. We have huge
data stored in existing Solr and need to maintained while mig
