Solrj Backward Compatibility After 4.5.1

[Furkan KAMACI]

Hi;

I have  a cluster as SolrCloud of 4.5.1 When I use a Solrj version greater
than 4.5.1 I get an error when deleting a document via CloudSolrServer of
Solrj. When I change the version to 4.5.1 as it works as usual.

I know that I should use same versions to avoid compatibility issues.
However I think that there should/may be backward compatibility between
Solr 4.x versions. If not it would be nice to write down compatibility list
somewhere else.

My question is that: What has changed after 4.5.1 so I can not delete a
document with higher versions of Solrj when using CloudSolrServer?

Thanks;
Furkan KAMACI