Is there a way to dynamically update a synonym file without restarting Solr server?

Question

As we know there is a synonym.txt file in conf directory, which I wanted to update whenever I found some new synonym words...

So is there any way to

Answer 1

I think you can build your own SynonymFilterFactory that extends the original and use your a custom FSTSynonymFilterFactory as delegator. your SynonymFilterFactory should extends the original SlowSynonymFilterFactory and call:

map = loadSolrSynonyms(loader, true, analyzer);

whenever you want to reload the synonym file.

For reloading your file when it changes you can use a watchdog thread that awke up every X time and check whether the sysnonim file was changed or you can use some file watcher to get notification when the file was changed.