12.x svn LTS recent regression: mysql table for unified index doesn't exist and page edit displays fatal error (even if edition saved properly)
I recently noticed that, in a few tikis that I migrated from a server to a new one. They were working fine for a few days, unified search index being updated on a cron job at night time, page edits fine, etc.
And suddenly, page edits in some tiki sites started to display this fatal error message of missing mysql table for the index (using Mysql Full Text Search engine for the advanced unified search).
I also noticed that the index update failed for one site because some tracker field had a perm name too long for Mysql Full Text Search as unified search engine.
Anyway, I'll dop a note here just in case other people start to experience similar issues, so that we can look for common patterns to track the issue down.
In myc ase, workaround was to manually reindex again the site through console. Then no error was shown in further wiki page edits for the same users, etc.
No idea what happened, but at some point in May or June 2015, this error might have stopped existing. I've reverted the production sites to default value again (index updated automatically upon site changes, and index refreshed only once per day based on cron job) and site doesn't show that error any more.
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