I tried to do a background reindex of Jira since I still needed to do stuff in Jira while it was going on. Unfortunately it was affecting some functionalities I needed to use so I cancelled the reindex while it was at 58%. I read that it was supposedly safe to cancel, but I ended up with an error saying "JIRA is unable to perform a background re-index at this time because the index files are either missing or corrupted."
I then tried to lock JIRA and rebuild the index, but after 12 hours, it was only at 3%. I thought locking JIRA and rebuilding was supposed to be faster than background reindexing. Do you guys have any advice on how to make background re-indexing an option again, or how to speed up re-indexing in general?