XF 2.0 Search not always finding keywords + user

[Mr Lucky]

I had a user mention that a search for certain keywords plus his username (for a thread of his) would not bring up the thread in results.

I tested this and although the serach found the thread without his username, he was right - when his name was added to the search - nada.

I rebuilt search index and - tada! - it fixed the issue.

So my question is what can cause that?

I read somewhere it should not normally be necessary to rebuild the search index, or is this something that should be done periodically?

NB: I'm using ES)

 

[S Thomas]

Are you using any kind of third party addons which change post author / date / move posts etc? Any kind of thread manipulation? That's what usually happens when addons don't respect the index.

 

[Mr Lucky]

Are you using any kind of third party addons which change post author / date / move posts etc? Any kind of thread manipulation? That's what usually happens when addons don't respect the index.

No, nothing like that.