: Solr 3.1.0 uses different javabin format from 1.4.1 : So if I use Solrj 1.4.1 jar , then i get javabin error while saving to : 3.1.0 : and if I use Solrj 3.1.0 jar , then I get javabin error while reading the : document from solr 1.4.1.
you can use the XML format to get portability during the upgrade process (solrJ 1.4 can talk to Solr 3.1 using the XML format, and vice-versa) but in general your comment scares me -- reading from one solr instance as the input to indexing in another solr instance will only work if *every* field in your old index was stored. if you are in that situation, then go ahead -- but be careful if you are not in that situation, you will loose any fields that were indexed but not stored. -Hoss
