I have Solr 3.6 powering search on a Wordpress site I maintain, and this morning I saw that Sorl could not execute a data import. I was attempting to run http://example.com:9393/solr/wordpress/dataimport?command=full-import. Whereas until today the import would chug happily along, now I am getting only the message, Indexing failed. Rolled back all changes.
I'm probably missing something obvious, but where does Solr keep the data import logs? I would like to check them out to see what the problem is, but I have not been able to find the right logs.
Solr does not have exclusive log file for data-import, log statements related to data-import process are written to standard log file that Solr writes to. If you are using Tomcat it should be ../logs/catalina.out .
Error could be caused by any number of problems between Solr, Data source, perhaps the data itself. You might want to check the following questions as well
Indexing failed. Rolled back all changes. (Solr DataImport)
solr dataimport error: Indexing failed. Rolled back all changes