You might want to compare marc.properties files to see if there are any significant differences there (there haven't been too many index changes between 1.x and 2.x, but a couple
of fields may have gone single- to multi-valued, etc., and that could have consequences). Additionally, you might get better compatibility by indexing over HTTP instead of doing direct writing, but in theory, all SolrMarc versions should work with older versions
From: Duffy, Mark [firstname.lastname@example.org]
Sent: Tuesday, December 31, 2013 10:29 AM
Subject: [VuFind-Tech] Vufind 2.1 Indexing Workflow for Vufind 1.x
Can anyone think of any problems with using vufind 2.1 indexing workflow for vufind 1.x. We are testing out Solr 4.6 and wanted to use the SolrMarc.jar available in 2.1. We are very early days, so wanted to know if anyone has any comments
on differences between the two.