On 12/17/2015 8:00 AM, Moll, Dr. Andreas wrote: > we are using SolR for some years now and are currently switching from SolR > 3.6 to 5.3.1. > SolR 5.3.1 deletes all index files when it shuts down and there were external > changes on the index-files > (in our case from a second SolR-server which produces the index).
I have *never* seen Solr delete the index files without outside influence. Either there's a misconfiguration, or something in your environment is doing the delete. If the DirectoryFactory were changed to use RAMDirectoryFactory, then all the data would be in memory, and that would be purged on shutdown, because it doesn't exist anywhere else. Assuming you're using a standard directory implementation that puts files on the disk, there is only one feature that I'm aware of that can automatically delete information -- it's possible to index documents with an expiration date, so it's automatically deleted once the expiration date is reached. I would not expect this to delete everything on shutdown, though. To figure out what's going on, we will need information about your server, exactly how you installed Solr, how it is started, how it is stopped, etc. Thanks, Shawn
