I wouldn't worry about filling holes in joists either. It not gonna effect the integrity of the joist one iota. Now if a joist is bad, you'll either have to replace it or sister a joist alongside it. I wouldn't worry about trying to glue together a split joist either. Just replace or sister new one alongside it with deck screws and construction adhesive.

Communists: I still hate them even after they changed their name to "liberals".
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My boss asked why I wasn't working. I told him I was being a democrat for Halloween.