If you are already using Apache Lucene 3.1, 3.2 or 3.3, we strongly recommend you upgrade to 3.4.0 because of the index corruption bug on OS or computer crash or power loss (LUCENE-3418), now fixed in 3.4.0.
2011/9/19 Isan Fulia <isan.fu...@germinait.com> > Hi all, > > Does upgrading solr from 3.3 to 3.4 requires reindexing of all the cores or > we can directly copy the data folders to > the new solr ? > > > -- > Thanks & Regards, > Isan Fulia. >
